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Tropical Storm Isaias Wind Speed Probabilities Number 27
2020-08-03 22:42:30| National Hurricane Center (Atlantic)
Issued at 2100 UTC MON AUG 03 2020 000 FONT14 KNHC 032042 PWSAT4 TROPICAL STORM ISAIAS WIND SPEED PROBABILITIES NUMBER 27 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092020 2100 UTC MON AUG 03 2020 AT 2100Z THE CENTER OF TROPICAL STORM ISAIAS WAS LOCATED NEAR LATITUDE 32.0 NORTH...LONGITUDE 79.4 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 60 KTS...70 MPH...110 KM/H. Z INDICATES COORDINATED UNIVERSAL TIME (GREENWICH) ATLANTIC STANDARD TIME (AST)...SUBTRACT 4 HOURS FROM Z TIME EASTERN DAYLIGHT TIME (EDT)...SUBTRACT 4 HOURS FROM Z TIME CENTRAL DAYLIGHT TIME (CDT)...SUBTRACT 5 HOURS FROM Z TIME WIND SPEED PROBABILITY TABLE FOR SPECIFIC LOCATIONS CHANCES OF SUSTAINED (1-MINUTE AVERAGE) WIND SPEEDS OF AT LEAST ...34 KT (39 MPH... 63 KM/H)... ...50 KT (58 MPH... 93 KM/H)... ...64 KT (74 MPH...119 KM/H)... FOR LOCATIONS AND TIME PERIODS DURING THE NEXT 5 DAYS PROBABILITIES FOR LOCATIONS ARE GIVEN AS OP(CP) WHERE OP IS THE PROBABILITY OF THE EVENT BEGINNING DURING AN INDIVIDUAL TIME PERIOD (ONSET PROBABILITY) (CP) IS THE PROBABILITY OF THE EVENT OCCURRING BETWEEN 18Z MON AND THE FORECAST HOUR (CUMULATIVE PROBABILITY) PROBABILITIES ARE GIVEN IN PERCENT X INDICATES PROBABILITIES LESS THAN 1 PERCENT PROBABILITIES FOR 34 KT AND 50 KT ARE SHOWN AT A GIVEN LOCATION WHEN THE 5-DAY CUMULATIVE PROBABILITY IS AT LEAST 3 PERCENT. PROBABILITIES FOR 34...50...64 KT SHOWN WHEN THE 5-DAY 64-KT CUMULATIVE PROBABILITY IS AT LEAST 1 PERCENT. - - - - WIND SPEED PROBABILITIES FOR SELECTED LOCATIONS - - - - FROM FROM FROM FROM FROM FROM FROM TIME 18Z MON 06Z TUE 18Z TUE 06Z WED 18Z WED 18Z THU 18Z FRI PERIODS TO TO TO TO TO TO TO 06Z TUE 18Z TUE 06Z WED 18Z WED 18Z THU 18Z FRI 18Z SAT FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT ILE ST PIERRE 34 X X( X) X( X) 2( 2) 1( 3) X( 3) X( 3) BURGEO NFLD 34 X X( X) X( X) 3( 3) 2( 5) X( 5) X( 5) PTX BASQUES 34 X X( X) 1( 1) 4( 5) 2( 7) X( 7) X( 7) EDDY POINT NS 34 X X( X) 2( 2) 5( 7) X( 7) X( 7) X( 7) SYDNEY NS 34 X X( X) 1( 1) 4( 5) 2( 7) X( 7) X( 7) SABLE ISLAND 34 X X( X) 1( 1) 3( 4) X( 4) X( 4) X( 4) HALIFAX NS 34 X X( X) 6( 6) 5(11) 1(12) X(12) X(12) YARMOUTH NS 34 X X( X) 16(16) 3(19) 1(20) X(20) X(20) MONCTON NB 34 X X( X) 7( 7) 10(17) 1(18) X(18) X(18) ST JOHN NB 34 X X( X) 13(13) 9(22) X(22) X(22) X(22) EASTPORT ME 34 X X( X) 21(21) 8(29) 1(30) X(30) X(30) BAR HARBOR ME 34 X X( X) 39(39) 4(43) X(43) X(43) X(43) BAR HARBOR ME 50 X X( X) 1( 1) 2( 3) X( 3) X( 3) X( 3) AUGUSTA ME 34 X X( X) 52(52) 3(55) X(55) X(55) X(55) AUGUSTA ME 50 X X( X) 5( 5) 1( 6) X( 6) X( 6) X( 6) PORTLAND ME 34 X 2( 2) 56(58) 1(59) X(59) X(59) X(59) PORTLAND ME 50 X X( X) 8( 8) 1( 9) X( 9) X( 9) X( 9) CONCORD NH 34 X 3( 3) 63(66) X(66) X(66) X(66) X(66) CONCORD NH 50 X X( X) 16(16) X(16) X(16) X(16) X(16) CONCORD NH 64 X X( X) 1( 1) X( 1) X( 1) X( 1) X( 1) PORTSMOUTH NH 34 X 3( 3) 60(63) X(63) X(63) X(63) X(63) PORTSMOUTH NH 50 X X( X) 11(11) X(11) X(11) X(11) X(11) WORCESTER MA 34 X 6( 6) 64(70) X(70) X(70) X(70) X(70) WORCESTER MA 50 X X( X) 17(17) X(17) X(17) X(17) X(17) WORCESTER MA 64 X X( X) 1( 1) X( 1) X( 1) X( 1) X( 1) SPRINGFIELD MA 34 X 8( 8) 64(72) X(72) X(72) X(72) X(72) SPRINGFIELD MA 50 X X( X) 21(21) X(21) X(21) X(21) X(21) SPRINGFIELD MA 64 X X( X) 2( 2) X( 2) X( 2) X( 2) X( 2) BOSTON MA 34 X 4( 4) 60(64) X(64) X(64) X(64) X(64) BOSTON MA 50 X X( X) 9( 9) X( 9) X( 9) X( 9) X( 9) HYANNIS MA 34 X 5( 5) 45(50) X(50) X(50) X(50) X(50) HYANNIS MA 50 X X( X) 3( 3) X( 3) X( 3) X( 3) X( 3) NANTUCKET MA 34 X 6( 6) 38(44) X(44) X(44) X(44) X(44) PROVIDENCE RI 34 X 9( 9) 57(66) X(66) X(66) X(66) X(66) PROVIDENCE RI 50 X X( X) 10(10) X(10) X(10) X(10) X(10) BRIDGEPORT CT 34 X 22(22) 54(76) X(76) X(76) X(76) X(76) BRIDGEPORT CT 50 X 1( 1) 24(25) X(25) X(25) X(25) X(25) BRIDGEPORT CT 64 X X( X) 2( 2) X( 2) X( 2) X( 2) X( 2) NEW HAVEN CT 34 X 18(18) 58(76) X(76) X(76) X(76) X(76) NEW HAVEN CT 50 X 1( 1) 25(26) X(26) X(26) X(26) X(26) NEW HAVEN CT 64 X X( X) 3( 3) X( 3) X( 3) X( 3) X( 3) HARTFORD CT 34 X 12(12) 63(75) X(75) X(75) X(75) X(75) HARTFORD CT 50 X X( X) 23(23) X(23) X(23) X(23) X(23) HARTFORD CT 64 X X( X) 2( 2) X( 2) X( 2) X( 2) X( 2) NEW LONDON CT 34 X 11(11) 60(71) X(71) X(71) X(71) X(71) NEW LONDON CT 50 X X( X) 17(17) X(17) X(17) X(17) X(17) NEW LONDON CT 64 X X( X) 2( 2) X( 2) X( 2) X( 2) X( 2) ALBANY NY 34 X 6( 6) 53(59) X(59) X(59) X(59) X(59) ALBANY NY 50 X X( X) 11(11) X(11) X(11) X(11) X(11) POUGHKEEPSIE 34 X 16(16) 52(68) X(68) X(68) X(68) X(68) POUGHKEEPSIE 50 X 1( 1) 18(19) X(19) X(19) X(19) X(19) POUGHKEEPSIE 64 X X( X) 2( 2) X( 2) X( 2) X( 2) X( 2) MONTAUK POINT 34 X 14(14) 55(69) X(69) X(69) X(69) X(69) MONTAUK POINT 50 X X( X) 13(13) X(13) X(13) X(13) X(13) ISLIP NY 34 X 31(31) 47(78) X(78) X(78) X(78) X(78) ISLIP NY 50 X 3( 3) 23(26) X(26) X(26) X(26) X(26) ISLIP NY 64 X X( X) 2( 2) X( 2) X( 2) X( 2) X( 2) NYC JFK AIRPRT 34 X 45(45) 35(80) X(80) X(80) X(80) X(80) NYC JFK AIRPRT 50 X 7( 7) 23(30) X(30) X(30) X(30) X(30) NYC JFK AIRPRT 64 X X( X) 3( 3) X( 3) X( 3) X( 3) X( 3) NYC CNTRL PARK 34 X 39(39) 38(77) X(77) X(77) X(77) X(77) NYC CNTRL PARK 50 X 7( 7) 21(28) X(28) X(28) X(28) X(28) NYC CNTRL PARK 64 X X( X) 3( 3) X( 3) X( 3) X( 3) X( 3) NEWARK NJ 34 X 44(44) 32(76) X(76) X(76) X(76) X(76) NEWARK NJ 50 X 8( 8) 19(27) X(27) X(27) X(27) X(27) NEWARK NJ 64 X X( X) 2( 2) X( 2) X( 2) X( 2) X( 2) TRENTON NJ 34 X 61(61) 14(75) X(75) X(75) X(75) X(75) TRENTON NJ 50 X 17(17) 9(26) X(26) X(26) X(26) X(26) TRENTON NJ 64 X 1( 1) 2( 3) X( 3) X( 3) X( 3) X( 3) NWS EARLE NJ 34 X 60(60) 20(80) X(80) X(80) X(80) X(80) NWS EARLE NJ 50 X 16(16) 15(31) X(31) X(31) X(31) X(31) NWS EARLE NJ 64 X 1( 1) 3( 4) X( 4) X( 4) X( 4) X( 4) ALLENTOWN PA 34 X 43(43) 15(58) X(58) X(58) X(58) X(58) ALLENTOWN PA 50 X 9( 9) 5(14) X(14) X(14) X(14) X(14) PHILADELPHIA 34 X 70(70) 6(76) X(76) X(76) X(76) X(76) PHILADELPHIA 50 X 24(24) 3(27) X(27) X(27) X(27) X(27) PHILADELPHIA 64 X 2( 2) 1( 3) X( 3) X( 3) X( 3) X( 3) ATLANTIC CITY 34 X 79(79) 3(82) X(82) X(82) X(82) X(82) ATLANTIC CITY 50 X 31(31) 6(37) X(37) X(37) X(37) X(37) ATLANTIC CITY 64 X 3( 3) 1( 4) X( 4) X( 4) X( 4) X( 4) BALTIMORE MD 34 X 50(50) 1(51) X(51) X(51) X(51) X(51) BALTIMORE MD 50 X 11(11) X(11) X(11) X(11) X(11) X(11) DOVER DE 34 1 79(80) 1(81) X(81) X(81) X(81) X(81) DOVER DE 50 X 33(33) X(33) X(33) X(33) X(33) X(33) DOVER DE 64 X 3( 3) X( 3) X( 3) X( 3) X( 3) X( 3) ANNAPOLIS MD 34 1 60(61) X(61) X(61) X(61) X(61) X(61) ANNAPOLIS MD 50 X 16(16) X(16) X(16) X(16) X(16) X(16) WASHINGTON DC 34 2 41(43) 1(44) X(44) X(44) X(44) X(44) WASHINGTON DC 50 X 7( 7) X( 7) X( 7) X( 7) X( 7) X( 7) CAPE HENLOPEN 34 1 85(86) X(86) X(86) X(86) X(86) X(86) CAPE HENLOPEN 50 X 45(45) 1(46) X(46) X(46) X(46) X(46) CAPE HENLOPEN 64 X 5( 5) X( 5) X( 5) X( 5) X( 5) X( 5) OCEAN CITY MD 34 3 86(89) X(89) X(89) X(89) X(89) X(89) OCEAN CITY MD 50 X 50(50) X(50) X(50) X(50) X(50) X(50) OCEAN CITY MD 64 X 5( 5) X( 5) X( 5) X( 5) X( 5) X( 5) PAX RIVER NAS 34 3 75(78) 1(79) X(79) X(79) X(79) X(79) PAX RIVER NAS 50 X 27(27) X(27) X(27) X(27) X(27) X(27) PAX RIVER NAS 64 X 3( 3) X( 3) X( 3) X( 3) X( 3) X( 3) WALLOPS CDA 34 3 88(91) X(91) X(91) X(91) X(91) X(91) WALLOPS CDA 50 X 52(52) X(52) X(52) X(52) X(52) X(52) WALLOPS CDA 64 X 6( 6) X( 6) X( 6) X( 6) X( 6) X( 6) CHARLOTTESVIL 34 3 9(12) X(12) X(12) X(12) X(12) X(12) RICHMOND VA 34 4 66(70) X(70) X(70) X(70) X(70) X(70) RICHMOND VA 50 X 17(17) X(17) X(17) X(17) X(17) X(17) DANVILLE VA 34 4 4( 8) 1( 9) X( 9) X( 9) X( 9) X( 9) NORFOLK NAS 34 6 87(93) X(93) X(93) X(93) X(93) X(93) NORFOLK NAS 50 X 57(57) X(57) X(57) X(57) X(57) X(57) NORFOLK NAS 64 X 5( 5) X( 5) X( 5) X( 5) X( 5) X( 5) NORFOLK VA 34 6 88(94) X(94) X(94) X(94) X(94) X(94) NORFOLK VA 50 X 57(57) X(57) X(57) X(57) X(57) X(57) NORFOLK VA 64 X 5( 5) X( 5) X( 5) X( 5) X( 5) X( 5) OCEANA NAS VA 34 6 89(95) X(95) X(95) X(95) X(95) X(95) OCEANA NAS VA 50 X 56(56) X(56) X(56) X(56) X(56) X(56) OCEANA NAS VA 64 X 5( 5) X( 5) X( 5) X( 5) X( 5) X( 5) ELIZABETH CTY 34 19 76(95) X(95) X(95) X(95) X(95) X(95) ELIZABETH CTY 50 X 52(52) X(52) X(52) X(52) X(52) X(52) ELIZABETH CTY 64 X 3( 3) X( 3) X( 3) X( 3) X( 3) X( 3) GREENSBORO NC 34 4 2( 6) X( 6) X( 6) X( 6) X( 6) X( 6) RALEIGH NC 34 35 6(41) X(41) X(41) X(41) X(41) X(41) RALEIGH NC 50 2 2( 4) X( 4) X( 4) X( 4) X( 4) X( 4) ROCKY MT NC 34 62 29(91) X(91) X(91) X(91) X(91) X(91) ROCKY MT NC 50 7 30(37) X(37) X(37) X(37) X(37) X(37) ROCKY MT NC 64 X 3( 3) X( 3) X( 3) X( 3) X( 3) X( 3) CAPE HATTERAS 34 22 44(66) X(66) X(66) X(66) X(66) X(66) CAPE HATTERAS 50 1 3( 4) X( 4) X( 4) X( 4) X( 4) X( 4) FAYETTEVILLE 34 73 X(73) X(73) X(73) X(73) X(73) X(73) FAYETTEVILLE 50 16 X(16) X(16) X(16) X(16) X(16) X(16) CHARLOTTE NC 34 2 2( 4) X( 4) X( 4) X( 4) X( 4) X( 4) CHERRY PT NC 34 89 7(96) X(96) X(96) X(96) X(96) X(96) CHERRY PT NC 50 21 27(48) X(48) X(48) X(48) X(48) X(48) CHERRY PT NC 64 1 1( 2) X( 2) X( 2) X( 2) X( 2) X( 2) NEW RIVER NC 34 98 X(98) X(98) X(98) X(98) X(98) X(98) NEW RIVER NC 50 62 9(71) X(71) X(71) X(71) X(71) X(71) NEW RIVER NC 64 7 2( 9) X( 9) X( 9) X( 9) X( 9) X( 9) MOREHEAD CITY 34 86 7(93) X(93) X(93) X(93) X(93) X(93) MOREHEAD CITY 50 13 13(26) X(26) X(26) X(26) X(26) X(26) SURF CITY NC 34 99 X(99) X(99) X(99) X(99) X(99) X(99) SURF CITY NC 50 71 3(74) X(74) X(74) X(74) X(74) X(74) SURF CITY NC 64 8 1( 9) X( 9) X( 9) X( 9) X( 9) X( 9) WILMINGTON NC 34 99 X(99) X(99) X(99) X(99) X(99) X(99) WILMINGTON NC 50 80 1(81) X(81) X(81) X(81) X(81) X(81) WILMINGTON NC 64 11 1(12) X(12) X(12) X(12) X(12) X(12) BALD HEAD ISL 34 99 X(99) X(99) X(99) X(99) X(99) X(99) BALD HEAD ISL 50 85 X(85) X(85) X(85) X(85) X(85) X(85) BALD HEAD ISL 64 10 X(10) X(10) X(10) X(10) X(10) X(10) FLORENCE SC 34 18 1(19) X(19) X(19) X(19) X(19) X(19) COLUMBIA SC 34 3 X( 3) X( 3) X( 3) X( 3) X( 3) X( 3) LITTLE RIVER 34 99 X(99) X(99) X(99) X(99) X(99) X(99) LITTLE RIVER 50 63 X(63) X(63) X(63) X(63) X(63) X(63) LITTLE RIVER 64 4 X( 4) X( 4) X( 4) X( 4) X( 4) X( 4) MYRTLE BEACH 34 99 X(99) X(99) X(99) X(99) X(99) X(99) MYRTLE BEACH 50 49 X(49) X(49) X(49) X(49) X(49) X(49) MYRTLE BEACH 64 2 X( 2) X( 2) X( 2) X( 2) X( 2) X( 2) GEORGETOWN SC 34 96 X(96) X(96) X(96) X(96) X(96) X(96) GEORGETOWN SC 50 8 X( 8) X( 8) X( 8) X( 8) X( 8) X( 8) CHARLESTON SC 34 38 X(38) X(38) X(38) X(38) X(38) X(38) $$ FORECASTER STEWART
Tropical Storm Isaias Forecast Advisory Number 27
2020-08-03 22:41:02| National Hurricane Center (Atlantic)
Issued at 2100 UTC MON AUG 03 2020 000 WTNT24 KNHC 032040 TCMAT4 TROPICAL STORM ISAIAS FORECAST/ADVISORY NUMBER 27 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092020 2100 UTC MON AUG 03 2020 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... THE TROPICAL STORM WARNING HAS BEEN EXTENDED NORTHWARD TO STONINGTON MAINE. THE TROPICAL STORM WARNING SOUTH OF SAVANNAH RIVER HAS BEEN DISCONTINUED. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A STORM SURGE WARNING IS IN EFFECT FOR... * EDISTO BEACH SOUTH CAROLINA TO CAPE FEAR NORTH CAROLINA * PAMLICO AND ALBEMARLE SOUNDS...INCLUDING THE NEUSE AND PAMLICO RIVERS * OREGON INLET NORTH CAROLINA TO THE NORTH CAROLINA/VIRGINIA BORDER A STORM SURGE WATCH IS IN EFFECT FOR... * CAPE FEAR TO OREGON INLET NORTH CAROLINA A HURRICANE WARNING IS IN EFFECT FOR... * SOUTH SANTEE RIVER SOUTH CAROLINA TO SURF CITY NORTH CAROLINA A TROPICAL STORM WARNING IS IN EFFECT FOR... * SAVANNAH RIVER TO SOUTH SANTEE RIVER SOUTH CAROLINA * NORTH OF SURF CITY NORTH CAROLINA TO STONINGTON MAINE * PAMLICO AND ALBEMARLE SOUNDS * CHESAPEAKE BAY * TIDAL POTOMAC RIVER * DELAWARE BAY * LONG ISLAND AND LONG ISLAND SOUND * MARTHA'S VINEYARD...NANTUCKET...AND BLOCK ISLAND A TROPICAL STORM WATCH IS IN EFFECT FOR... * NORTH OF STONINGTON TO EASTPORT MAINE A STORM SURGE WARNING MEANS THERE IS A DANGER OF LIFE-THREATENING INUNDATION...FROM RISING WATER MOVING INLAND FROM THE COASTLINE...IN THE INDICATED LOCATIONS. FOR A DEPICTION OF AREAS AT RISK... PLEASE SEE THE NATIONAL WEATHER SERVICE STORM SURGE WATCH/WARNING GRAPHIC AT HURRICANES.GOV. THIS IS A LIFE-THREATENING SITUATION. PERSONS LOCATED WITHIN THESE AREAS SHOULD TAKE ALL NECESSARY ACTIONS TO PROTECT LIFE AND PROPERTY FROM RISING WATER AND THE POTENTIAL FOR OTHER DANGEROUS CONDITIONS. PROMPTLY FOLLOW EVACUATION AND OTHER INSTRUCTIONS FROM LOCAL OFFICIALS. A STORM SURGE WATCH MEANS THERE IS A POSSIBILITY OF LIFE- THREATENING INUNDATION...FROM RISING WATER MOVING INLAND FROM THE COASTLINE. A HURRICANE WARNING MEANS THAT HURRICANE CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA. A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA...GENERALLY WITHIN 36 HOURS. A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA...GENERALLY WITHIN 48 HOURS. TROPICAL STORM CENTER LOCATED NEAR 32.0N 79.4W AT 03/2100Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE NORTH-NORTHEAST OR 15 DEGREES AT 14 KT ESTIMATED MINIMUM CENTRAL PRESSURE 993 MB MAX SUSTAINED WINDS 60 KT WITH GUSTS TO 75 KT. 50 KT....... 50NE 50SE 0SW 20NW. 34 KT.......110NE 110SE 0SW 60NW. 12 FT SEAS..120NE 180SE 90SW 60NW. WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT. REPEAT...CENTER LOCATED NEAR 32.0N 79.4W AT 03/2100Z AT 03/1800Z CENTER WAS LOCATED NEAR 31.2N 79.7W FORECAST VALID 04/0600Z 34.7N 78.1W...INLAND MAX WIND 60 KT...GUSTS 75 KT. 50 KT... 50NE 50SE 0SW 20NW. 34 KT...110NE 120SE 0SW 60NW. FORECAST VALID 04/1800Z 39.3N 75.3W...INLAND MAX WIND 55 KT...GUSTS 70 KT. 50 KT... 50NE 50SE 0SW 20NW. 34 KT...110NE 140SE 0SW 60NW. FORECAST VALID 05/0600Z 44.5N 71.8W...INLAND MAX WIND 45 KT...GUSTS 60 KT. 34 KT...120NE 150SE 0SW 40NW. FORECAST VALID 05/1800Z 48.8N 68.6W...POST-TROP/EXTRATROP MAX WIND 30 KT...GUSTS 45 KT. FORECAST VALID 06/0600Z 52.0N 67.1W...POST-TROP/EXTRATROP MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 06/1800Z 54.3N 63.4W...POST-TROP/EXTRATROP MAX WIND 25 KT...GUSTS 35 KT. EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM ON DAY 4 AND 175 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY OUTLOOK VALID 07/1800Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 32.0N 79.4W INTERMEDIATE PUBLIC ADVISORY...WTNT34 KNHC/MIATCPAT4...AT 04/0000Z NEXT ADVISORY AT 04/0300Z $$ FORECASTER STEWART
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Tropical Storm Isaias Public Advisory Number 26A
2020-08-03 19:58:51| National Hurricane Center (Atlantic)
Issued at 200 PM EDT Mon Aug 03 2020 871 WTNT34 KNHC 031758 CCA TCPAT4 BULLETIN Tropical Storm Isaias Intermediate Advisory Number 26A...Corrected NWS National Hurricane Center Miami FL AL092020 200 PM EDT Mon Aug 03 2020 Corrected to remove watches and warnings changes ...ISAIAS STILL EXPECTED TO MAKE LANDFALL TONIGHT AS A HURRICANE... ...STRONG WINDS AND HEAVY RAINFALL LIKELY FROM THE EASTERN CAROLINAS TO THE MID-ATLANTIC COAST TONIGHT AND TUESDAY... SUMMARY OF 200 PM EDT...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...31.2N 80.0W ABOUT 115 MI...190 KM S OF CHARLESTON SOUTH CAROLINA ABOUT 180 MI...290 KM SSW OF MYRTLE BEACH SOUTH CAROLINA MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H PRESENT MOVEMENT...N OR 5 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...993 MB...29.32 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * Edisto Beach South Carolina to Cape Fear North Carolina * Pamlico and Albemarle Sounds, including the Neuse and Pamlico Rivers * Oregon Inlet North Carolina to the North Carolina/Virginia border A Storm Surge Watch is in effect for... * Cape Fear to Oregon Inlet North Carolina A Hurricane Warning is in effect for... * South Santee River South Carolina to Surf City North Carolina A Tropical Storm Warning is in effect for... * Altamaha Sound Georgia to South Santee River South Carolina * North of Surf City North Carolina to the Mouth of the Merrimack River * Pamlico and Albemarle Sounds * Chesapeake Bay * Tidal Potomac River * Delaware Bay * Long Island and Long Island Sound * Martha's Vineyard, Nantucket, and Block Island A Tropical Storm Watch is in effect for... * Mouth of the Merrimack River to Eastport Maine Interests elsewhere along the northeast coast of the United States should monitor the progress of Isaias. Additional watches or warnings may be required later today. A Storm Surge Warning means there is a danger of life-threatening inundation, from rising water moving inland from the coastline, during the next 36 hours in the indicated locations. For a depiction of areas at risk, please see the National Weather Service Storm Surge Watch/Warning Graphic at hurricanes.gov. This is a life-threatening situation. Persons located within these areas should take all necessary actions to protect life and property from rising water and the potential for other dangerous conditions. Promptly follow evacuation and other instructions from local officials. A Storm Surge Watch means there is a possibility of life- threatening inundation, from rising water moving inland from the coastline, in the indicated locations during the next 48 hours. A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area, in this case within 24 hours. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, generally within 36 hours. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. For storm information specific to your area, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. DISCUSSION AND OUTLOOK ---------------------- At 200 PM EDT (1800 UTC), the center of Tropical Storm Isaias was located by an Air Force Reserve reconnaissance aircraft and NOAA Doppler weather radars near latitude 31.2 North, longitude 80.0 West. Isaias is moving toward the north near 13 mph (20 km/h), and this general motion is expected to continue this afternoon. A turn toward the north-northeast along with a slight increase in forward speed is expected by early this evening, followed by a faster motion tonight and Tuesday. On the forecast track, the center of Isaias will pass well east of the Georgia coast through this afternoon. The center of Isaias will then approach the coasts of northeastern South Carolina and southern North Carolina within the hurricane warning area this evening. The center will then move inland over eastern North Carolina tonight, and move along the coast of the mid-Atlantic states on Tuesday and into the northeastern United States Tuesday night. Data from the reconnaissance aircraft and NOAA Doppler weather radars indicate that maximum sustained winds remain near 70 mph (110 km/h) with higher gusts. Some strengthening is forecast this afternoon or early evening, and Isaias is expected to regain hurricane strength just before the cyclone reaches the coast of northeastern South Carolina or southern North Carolina tonight. Only slow weakening is anticipated after Isaias makes landfall in the Carolinas and moves across the U.S. mid-Atlantic region tonight and Tuesday. Tropical-storm-force winds extend outward up to 125 miles (205 km) from the center. During the past hour, a wind gust to 40 mph (65 km/h) occurred at Folly Island Pier, South Carolina, and at COMRP buoy 41033 located just offshore Fripp Island, South Carolina. The estimated minimum central pressure based on recent reports from the aircraft is 993 mb (29.32 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Isaias can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT4, WMO header WTNT44 KNHC, and on the web at www.hurricanes.gov/text/MIATCDAT4.shtml. STORM SURGE: The combination of a dangerous storm surge and the tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline. The water could reach the following heights above ground somewhere in the indicated areas if the peak surge occurs at the time of high tide... South Santee River SC to Cape Fear NC...3-5 ft Edisto Beach SC to South Santee River SC...2-4 ft Cape Fear NC to the North Carolina/Virginia border including Pamlico Sound, Albemarle Sound, Neuse and Pamlico Rivers...2-4 ft Altamaha Sound GA to Edisto Beach SC...1-3 ft North of the North Carolina/Virginia border to Martha's Vineyard including the Chesapeake Bay, the Tidal Potomac River, Delaware Bay, Long Island Sound, Block Island Sound, Narragansett Bay, Buzzards Bay, and Vineyard Sound1-3 ft The deepest water will occur along the immediate coast in areas of onshore winds, where the surge will be accompanied by large waves. Surge-related flooding depends on the relative timing of the surge and the tidal cycle, and can vary greatly over short distances. For information specific to your area, please see products issued by your local National Weather Service forecast office. WIND: Hurricane conditions are expected within the hurricane warning area in South and North Carolina this evening through tonight, with tropical storm conditions beginning later today. Widespread tropical-storm-conditions are expected in the tropical storm warning area from coastal North Carolina to the mid-Atlantic states tonight and Tuesday, with wind gusts to hurricane force possible. These winds could cause tree damage and power outages. Tropical storm conditions are expected to reach southern New England late Tuesday and are possible along the northern New England coast Tuesday night and early Wednesday. RAINFALL: The following rainfall accumulations are expected along and near the track of Isaias: Carolinas and the Mid-Atlantic: 3 to 6 inches, isolated maximum totals 8 inches. Southeast New York and much of New England: 2 to 4 inches, isolated maximum totals 6 inches. Heavy rainfall from Isaias will result in flash and urban flooding, some of which may be significant in the eastern Carolinas and the mid-Atlantic, through Tuesday night near the path of Isaias up the East Coast of the United States. Widespread minor to moderate river flooding is possible across portions of the Carolinas and the mid-Atlantic. Additionally, quick-responding rivers in the southern Appalachians and Northeast will be susceptible to minor river flooding. SURF: Swells generated by Isaias are affecting portions of the Bahamas and the southeast coast of the United States and will spread northward along the U.S. east coast during the next couple of days. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. TORNADOES: A few tornadoes will be possible over coastal South Carolina beginning this evening, spreading across eastern North Carolina tonight into Tuesday morning. A couple tornadoes will be possible on Tuesday from eastern Virginia northeastward into southern New England. NEXT ADVISORY ------------- Next complete advisory at 500 PM EDT. $$ Forecaster Stewart
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Tropical Storm Isaias Forecast Discussion Number 26
2020-08-03 16:57:19| National Hurricane Center (Atlantic)
Issued at 1100 AM EDT Mon Aug 03 2020 000 WTNT44 KNHC 031457 TCDAT4 Tropical Storm Isaias Discussion Number 26 NWS National Hurricane Center Miami FL AL092020 1100 AM EDT Mon Aug 03 2020 Isaias continues to undergo strong bursting and then weakening convective phases, with the cyclone currently in the latter mode. Satellite and radar data indicate that Isaias' convective organization has become a little disheveled since the previous advisory, but this is to be expected since the tropical cyclone has been undergoing bursting periods about every 8 hours or so beginning overnight around 0600-0900Z. Thus, the system is due for another re-organization phase shortly if it holds true to form. That may already be underway based on recent radar and recon data showing a slight eastward shift in the center position. The highest 700-mb flight-level wind observed has been 63 kt, which reduces to about a 57-kt surface wind. Jacksonville Doppler radar velocities north and north-northwest of the center have been around 60 kt at 9,000 ft, which equals about 54 kt surface winds. The initial intensity will be held at 60 kt, perhaps a little generously, for this advisory despite the recent rise in the central pressure to around 998 mb. Isaias is still moving northward but a little faster at 360/11 kt. The track forecast reasoning remains essentially the same as the previous few advisories, with Isaias expected to gradually turn toward the north-northeast later today and begin to accelerate by this evening. The latest NHC model guidance is more tightly packed about the previous advisory track, so only minor tweaks were required. The new NHC track forecast lies very close to a blend of the multi-model consensus aids TVCA, GFEX, TVCX, and NOAA-HCCA. Current westerly vertical wind shear of 20-25 kt is expected to decrease somewhat during the next 12 h and also become more southwesterly, which will be in better alignment with Isaias' forward motion vector. The decrease in the shear should result in less tilt to the cyclone, allowing Isaias to strengthen and regain hurricane status just before making landfall, and most of the intensity guidance shows a 60-65 kt system at that time. After landfall, Isaias is forecast to only slowly weaken due to interaction with an unusually strong winter-type jetstream that will be possessing winds of 100-120 kt. Expected strong baroclinic forcing will keep Isaias' circulation intact and also produce very strong wind gusts along the Mid-Atlantic states tomorrow. As a result, the gust factors at 24-48 h have been increased above the standard 20 percent in the Forecast/Advisory (TCMAT4). The cyclone is forecast to be absorbed by a larger extratropical low over Canada in 3-4 days. Key Messages: 1. There is the danger of life-threatening storm surge inundation along portions of the immediate coastline and adjacent waterways of northeastern South Carolina and the North Carolina coast in the Storm Surge Warning area. Residents in these areas should follow advice given by local emergency officials. 2. Isaias is forecast to regain hurricane strength before it reaches the coast of northeastern South Carolina and southern North Carolina, and hurricane conditions are expected in the Hurricane Warning area by this evening. Preparations should be rushed to completion. 3. Isaias is expected to bring widespread sustained tropical storm force winds and wind gusts to hurricane force to the mid-Atlantic coast Tuesday, which could cause tree damage and power outages. Tropical storm conditions are expected to reach southern New England on late Tuesday and are possible along the northern New England coast Tuesday night and early Wednesday. 4. Heavy rainfall will result in flash and urban flooding, some of which may be significant in the eastern Carolinas and the mid-Atlantic, through Tuesday night near the path of Isaias up the East Coast of the United States. Widespread minor to moderate river flooding is possible across portions of the Carolinas and the Mid-Atlantic. FORECAST POSITIONS AND MAX WINDS INIT 03/1500Z 30.7N 80.1W 60 KT 70 MPH 12H 04/0000Z 33.1N 79.2W 65 KT 75 MPH 24H 04/1200Z 37.2N 77.0W 55 KT 65 MPH...INLAND 36H 05/0000Z 42.0N 73.8W 50 KT 60 MPH...INLAND 48H 05/1200Z 46.7N 70.2W 35 KT 40 MPH...INLAND 60H 06/0000Z 50.2N 67.2W 30 KT 35 MPH...POST-TROP/EXTRATROP 72H 06/1200Z 53.5N 64.2W 25 KT 30 MPH...POST-TROP/EXTRATROP 96H 07/1200Z...DISSIPATED $$ Forecaster Stewart
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Tropical Storm Isaias Public Advisory Number 26
2020-08-03 16:52:21| National Hurricane Center (Atlantic)
Issued at 1100 AM EDT Mon Aug 03 2020 000 WTNT34 KNHC 031452 TCPAT4 BULLETIN Tropical Storm Isaias Advisory Number 26 NWS National Hurricane Center Miami FL AL092020 1100 AM EDT Mon Aug 03 2020 ...ISAIAS FORECAST TO MAKE LANDFALL TONIGHT AS A HURRICANE... ...EXPECTED TO BRING STRONG WINDS AND HEAVY RAINFALL FROM THE EASTERN CAROLINAS TO THE MID-ATLANTIC COAST TONIGHT AND TUESDAY... SUMMARY OF 1100 AM EDT...1500 UTC...INFORMATION ----------------------------------------------- LOCATION...30.7N 80.1W ABOUT 90 MI...145 KM ESE OF BRUNSWICK GEORGIA ABOUT 220 MI...350 KM SSW OF MYRTLE BEACH SOUTH CAROLINA MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H PRESENT MOVEMENT...N OR 360 DEGREES AT 13 MPH...20 KM/H MINIMUM CENTRAL PRESSURE...998 MB...29.47 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: A Storm Surge Warning has been issued for portions of the Pamlico and Albemarle Sounds, including the Neuse and Pamlico Rivers, and for the North Carolina Outer Banks form Oregon Inlet to the North Carolina/Virginia border. The Tropical Storm Warning has been extended northward to the mouth of the Merrimack River, including Martha's Vineyard, Nantucket, and Block Island. The Tropical Storm Watch for the remainder of the Chesapeake Bay and the Tidal Potomac River north of Cobb Island has been changed to a Tropical Storm Warning. The Tropical Storm Watch has been extended northward to Eastport Maine. The Tropical Storm Warning has been discontinued south of Altamaha Sound. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * Edisto Beach South Carolina to Cape Fear North Carolina * Pamlico and Albemarle Sounds, including the Neuse and Pamlico Rivers * Oregon Inlet North Carolina to the North Carolina/Virginia border A Storm Surge Watch is in effect for... * Cape Fear to Oregon Inlet North Carolina A Hurricane Warning is in effect for... * South Santee River South Carolina to Surf City North Carolina A Tropical Storm Warning is in effect for... * Altamaha Sound Georgia to South Santee River South Carolina * North of Surf City North Carolina to the Mouth of the Merrimack River * Pamlico and Albemarle Sounds * Chesapeake Bay * Tidal Potomac River * Delaware Bay * Long Island and Long Island Sound * Martha's Vineyard, Nantucket, and Block Island A Tropical Storm Watch is in effect for... * Mouth of the Merrimack River to Eastport Maine Interests elsewhere along the northeast coast of the United States should monitor the progress of Isaias. Additional watches or warnings may be required later today. A Storm Surge Warning means there is a danger of life-threatening inundation, from rising water moving inland from the coastline, during the next 36 hours in the indicated locations. For a depiction of areas at risk, please see the National Weather Service Storm Surge Watch/Warning Graphic at hurricanes.gov. This is a life-threatening situation. Persons located within these areas should take all necessary actions to protect life and property from rising water and the potential for other dangerous conditions. Promptly follow evacuation and other instructions from local officials. A Storm Surge Watch means there is a possibility of life- threatening inundation, from rising water moving inland from the coastline, in the indicated locations during the next 48 hours. A Hurricane Warning means that hurricane conditions are expected somewhere within the warning area, in this case within 24 hours. Preparations to protect life and property should be rushed to completion. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, generally within 36 hours. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area, generally within 48 hours. For storm information specific to your area, including possible inland watches and warnings, please monitor products issued by your local National Weather Service forecast office. DISCUSSION AND OUTLOOK ---------------------- At 1100 AM EDT (1500 UTC), the center of Tropical Storm Isaias was located by an Air Force Reserve reconnaissance aircraft and NOAA Doppler weather radars near latitude 30.7 North, longitude 80.1 West. Isaias is moving toward the north near 13 mph (20 km/h), and this general motion is expected to continue today. A turn toward the north-northeast along with an increase in forward speed is expected by this late afternoon or early evening, followed by a faster northeastward motion tonight and Tuesday. On the forecast track, the center of Isaias will pass well east of the Georgia coast through this afternoon. The center of Isaias will then approach the coasts of northeastern South Carolina and southern North Carolina within the hurricane warning area this evening. The center will then move inland over eastern North Carolina tonight, and move along the coast of the mid-Atlantic states on Tuesday and into the northeastern United States Tuesday night. Data from the reconnaissance aircraft and NOAA Doppler weather radars indicate that maximum sustained winds remain near 70 mph (110 km/h) with higher gusts. Some strengthening is forecast this afternoon, and Isaias is expected to regain hurricane strength just before it reaches the coast of northeastern South Carolina or southern North Carolina tonight. Only slow weakening is anticipated after Isaias makes landfall in the Carolinas and moves across the U.S. mid-Atlantic region tonight and Tuesday. Tropical-storm-force winds extend outward up to 125 miles (205 km) from the center. The estimated minimum central pressure based on reports from the aircraft is 998 mb (29.47 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Isaias can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT4, WMO header WTNT44 KNHC, and on the web at www.hurricanes.gov/text/MIATCDAT4.shtml. STORM SURGE: The combination of a dangerous storm surge and the tide will cause normally dry areas near the coast to be flooded by rising waters moving inland from the shoreline. The water could reach the following heights above ground somewhere in the indicated areas if the peak surge occurs at the time of high tide... South Santee River SC to Cape Fear NC...3-5 ft Edisto Beach SC to South Santee River SC...2-4 ft Cape Fear NC to the North Carolina/Virginia border including Pamlico Sound, Albemarle Sound, Neuse and Pamlico Rivers...2-4 ft Altamaha Sound GA to Edisto Beach SC...1-3 ft North of the North Carolina/Virginia border to Martha's Vineyard including the Chesapeake Bay, the Tidal Potomac River, and Delaware Bay...1-3 ft The deepest water will occur along the immediate coast in areas of onshore winds, where the surge will be accompanied by large waves. Surge-related flooding depends on the relative timing of the surge and the tidal cycle, and can vary greatly over short distances. For information specific to your area, please see products issued by your local National Weather Service forecast office. WIND: Hurricane conditions are expected within the hurricane warning area in South and North Carolina this evening through tonight, with tropical storm conditions beginning later today. Widespread tropical-storm-conditions are expected in the tropical storm warning area from coastal North Carolina to the mid-Atlantic states tonight and Tuesday, with wind gusts to hurricane force possible. These winds could cause tree damage and power outages. Tropical storm conditions are expected to reach southern New England late Tuesday and are possible along the northern New England coast Tuesday night and early Wednesday. RAINFALL: The following rainfall accumulations are expected along and near the track of Isaias: Carolinas and the Mid-Atlantic: 3 to 6 inches, isolated maximum totals 8 inches. Southeast New York and much of New England: 2 to 4 inches, isolated maximum totals 6 inches. Heavy rainfall from Isaias will result in flash and urban flooding, some of which may be significant in the eastern Carolinas and the mid-Atlantic, through Tuesday night near the path of Isaias up the East Coast of the United States. Widespread minor to moderate river flooding is possible across portions of the Carolinas and the mid-Atlantic. Additionally, quick-responding rivers in the southern Appalachians and Northeast will be susceptible to minor river flooding. SURF: Swells generated by Isaias are affecting portions of the Bahamas and the southeast coast of the United States and will spread northward along the U.S. east coast during the next couple of days. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. TORNADOES: A few tornadoes will be possible over coastal South Carolina beginning this evening, spreading across eastern North Carolina tonight into Tuesday morning. A couple tornadoes will be possible on Tuesday from eastern Virginia northeastward into southern New England. NEXT ADVISORY ------------- Next intermediate advisory at 200 PM EDT. Next complete advisory at 500 PM EDT. $$ Forecaster Stewart
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