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Tropical Storm Isaias Wind Speed Probabilities Number 30
2020-08-04 16:42:11| National Hurricane Center (Atlantic)
Issued at 1500 UTC TUE AUG 04 2020 000 FONT14 KNHC 041442 PWSAT4 TROPICAL STORM ISAIAS WIND SPEED PROBABILITIES NUMBER 30 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092020 1500 UTC TUE AUG 04 2020 AT 1500Z THE CENTER OF TROPICAL STORM ISAIAS WAS LOCATED NEAR LATITUDE 39.1 NORTH...LONGITUDE 76.1 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 12Z TUE 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 12Z TUE 00Z WED 12Z WED 00Z THU 12Z THU 12Z FRI 12Z SAT PERIODS TO TO TO TO TO TO TO 00Z WED 12Z WED 00Z THU 12Z THU 12Z FRI 12Z SAT 12Z SUN FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT HALIFAX NS 34 1 2( 3) X( 3) X( 3) X( 3) X( 3) X( 3) YARMOUTH NS 34 3 2( 5) X( 5) X( 5) X( 5) X( 5) X( 5) MONCTON NB 34 1 3( 4) X( 4) X( 4) X( 4) X( 4) X( 4) ST JOHN NB 34 2 3( 5) X( 5) X( 5) X( 5) X( 5) X( 5) EASTPORT ME 34 4 4( 8) X( 8) X( 8) X( 8) X( 8) X( 8) BAR HARBOR ME 34 10 6(16) X(16) X(16) X(16) X(16) X(16) AUGUSTA ME 34 28 11(39) X(39) X(39) X(39) X(39) X(39) PORTLAND ME 34 54 7(61) X(61) X(61) X(61) X(61) X(61) CONCORD NH 34 88 1(89) X(89) X(89) X(89) X(89) X(89) CONCORD NH 50 3 1( 4) X( 4) X( 4) X( 4) X( 4) X( 4) PORTSMOUTH NH 34 71 1(72) X(72) X(72) X(72) X(72) X(72) WORCESTER MA 34 91 X(91) X(91) X(91) X(91) X(91) X(91) WORCESTER MA 50 3 X( 3) X( 3) X( 3) X( 3) X( 3) X( 3) SPRINGFIELD MA 34 98 X(98) X(98) X(98) X(98) X(98) X(98) SPRINGFIELD MA 50 10 X(10) X(10) X(10) X(10) X(10) X(10) BOSTON MA 34 73 1(74) X(74) X(74) X(74) X(74) X(74) HYANNIS MA 34 46 X(46) X(46) X(46) X(46) X(46) X(46) NANTUCKET MA 34 36 X(36) X(36) X(36) X(36) X(36) X(36) PROVIDENCE RI 34 74 X(74) X(74) X(74) X(74) X(74) X(74) BRIDGEPORT CT 34 99 X(99) X(99) X(99) X(99) X(99) X(99) BRIDGEPORT CT 50 11 X(11) X(11) X(11) X(11) X(11) X(11) NEW HAVEN CT 34 99 X(99) X(99) X(99) X(99) X(99) X(99) NEW HAVEN CT 50 7 X( 7) X( 7) X( 7) X( 7) X( 7) X( 7) HARTFORD CT 34 98 X(98) X(98) X(98) X(98) X(98) X(98) HARTFORD CT 50 7 X( 7) X( 7) X( 7) X( 7) X( 7) X( 7) NEW LONDON CT 34 88 X(88) X(88) X(88) X(88) X(88) X(88) ALBANY NY 34 98 X(98) X(98) X(98) X(98) X(98) X(98) ALBANY NY 50 21 X(21) X(21) X(21) X(21) X(21) X(21) ALBANY NY 64 2 X( 2) X( 2) X( 2) X( 2) X( 2) X( 2) POUGHKEEPSIE 34 99 X(99) X(99) X(99) X(99) X(99) X(99) POUGHKEEPSIE 50 49 X(49) X(49) X(49) X(49) X(49) X(49) POUGHKEEPSIE 64 1 X( 1) X( 1) X( 1) X( 1) X( 1) X( 1) MONTAUK POINT 34 79 X(79) X(79) X(79) X(79) X(79) X(79) ISLIP NY 34 99 X(99) X(99) X(99) X(99) X(99) X(99) ISLIP NY 50 5 X( 5) X( 5) X( 5) X( 5) X( 5) X( 5) NYC JFK AIRPRT 34 99 X(99) X(99) X(99) X(99) X(99) X(99) NYC JFK AIRPRT 50 26 X(26) X(26) X(26) X(26) X(26) X(26) NYC CNTRL PARK 34 99 X(99) X(99) X(99) X(99) X(99) X(99) NYC CNTRL PARK 50 49 X(49) X(49) X(49) X(49) X(49) X(49) NEWARK NJ 34 99 X(99) X(99) X(99) X(99) X(99) X(99) NEWARK NJ 50 63 X(63) X(63) X(63) X(63) X(63) X(63) TRENTON NJ 34 99 X(99) X(99) X(99) X(99) X(99) X(99) TRENTON NJ 50 83 X(83) X(83) X(83) X(83) X(83) X(83) TRENTON NJ 64 1 X( 1) X( 1) X( 1) X( 1) X( 1) X( 1) NWS EARLE NJ 34 99 X(99) X(99) X(99) X(99) X(99) X(99) NWS EARLE NJ 50 42 X(42) X(42) X(42) X(42) X(42) X(42) ALLENTOWN PA 34 99 X(99) X(99) X(99) X(99) X(99) X(99) ALLENTOWN PA 50 12 X(12) X(12) X(12) X(12) X(12) X(12) PHILADELPHIA 34 99 X(99) X(99) X(99) X(99) X(99) X(99) PHILADELPHIA 50 90 X(90) X(90) X(90) X(90) X(90) X(90) PHILADELPHIA 64 2 X( 2) X( 2) X( 2) X( 2) X( 2) X( 2) ATLANTIC CITY 34 99 X(99) X(99) X(99) X(99) X(99) X(99) ATLANTIC CITY 50 52 X(52) X(52) X(52) X(52) X(52) X(52) BALTIMORE MD 34 99 X(99) X(99) X(99) X(99) X(99) X(99) DOVER DE 34 99 X(99) X(99) X(99) X(99) X(99) X(99) DOVER DE 50 99 X(99) X(99) X(99) X(99) X(99) X(99) ANNAPOLIS MD 34 99 X(99) X(99) X(99) X(99) X(99) X(99) WASHINGTON DC 34 95 X(95) X(95) X(95) X(95) X(95) X(95) CAPE HENLOPEN 34 99 X(99) X(99) X(99) X(99) X(99) X(99) CAPE HENLOPEN 50 80 X(80) X(80) X(80) X(80) X(80) X(80) OCEAN CITY MD 34 99 X(99) X(99) X(99) X(99) X(99) X(99) OCEAN CITY MD 50 6 X( 6) X( 6) X( 6) X( 6) X( 6) X( 6) PAX RIVER NAS 34 99 X(99) X(99) X(99) X(99) X(99) X(99) PAX RIVER NAS 50 99 X(99) X(99) X(99) X(99) X(99) X(99) WALLOPS CDA 34 99 X(99) X(99) X(99) X(99) X(99) X(99) WALLOPS CDA 50 51 X(51) X(51) X(51) X(51) X(51) X(51) RICHMOND VA 34 99 X(99) X(99) X(99) X(99) X(99) X(99) NORFOLK NAS 34 99 X(99) X(99) X(99) X(99) X(99) X(99) NORFOLK VA 34 99 X(99) X(99) X(99) X(99) X(99) X(99) OCEANA NAS VA 34 99 X(99) X(99) X(99) X(99) X(99) X(99) $$ FORECASTER STEWART
Tropical Storm Isaias Forecast Advisory Number 30
2020-08-04 16:41:34| National Hurricane Center (Atlantic)
Issued at 1500 UTC TUE AUG 04 2020 000 WTNT24 KNHC 041441 TCMAT4 TROPICAL STORM ISAIAS FORECAST/ADVISORY NUMBER 30 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092020 1500 UTC TUE AUG 04 2020 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... THE TROPICAL STORM WARNING HAS BEEN DISCONTINUED SOUTH OF DUCK...NORTH CAROLINA...INCLUDING THE PAMLICO AND ALBEMARLE SOUNDS. THE STORM SURGE WARNING HAS BEEN DISCONTINUED. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A TROPICAL STORM WARNING IS IN EFFECT FOR... * NORTH OF DUCK NORTH CAROLINA TO EASTPORT MAINE * CHESAPEAKE BAY * TIDAL POTOMAC RIVER * DELAWARE BAY * LONG ISLAND AND LONG ISLAND SOUND * MARTHA'S VINEYARD...NANTUCKET...AND BLOCK ISLAND A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA...IN THIS CASE WITHIN THE NEXT 12 TO 18 HOURS. TROPICAL STORM CENTER LOCATED NEAR 39.1N 76.1W AT 04/1500Z POSITION ACCURATE WITHIN 25 NM PRESENT MOVEMENT TOWARD THE NORTH-NORTHEAST OR 20 DEGREES AT 30 KT ESTIMATED MINIMUM CENTRAL PRESSURE 993 MB MAX SUSTAINED WINDS 60 KT WITH GUSTS TO 80 KT. 50 KT....... 60NE 60SE 0SW 0NW. 34 KT.......110NE 120SE 40SW 40NW. 12 FT SEAS..180NE 180SE 0SW 0NW. 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 39.1N 76.1W AT 04/1500Z AT 04/1200Z CENTER WAS LOCATED NEAR 37.7N 76.8W FORECAST VALID 05/0000Z 43.2N 73.8W...INLAND MAX WIND 50 KT...GUSTS 65 KT. 50 KT... 40NE 70SE 20SW 0NW. 34 KT...120NE 180SE 40SW 40NW. FORECAST VALID 05/1200Z 48.2N 71.7W...POST-TROP/INLAND MAX WIND 35 KT...GUSTS 45 KT. 34 KT... 0NE 180SE 0SW 0NW. FORECAST VALID 06/0000Z 52.0N 71.1W...POST-TROP/EXTRATROP MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 06/1200Z 53.6N 69.5W...POST-TROP/EXTRATROP MAX WIND 20 KT...GUSTS 30 KT. FORECAST VALID 07/0000Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 39.1N 76.1W INTERMEDIATE PUBLIC ADVISORY...WTNT34 KNHC/MIATCPAT4...AT 04/1800Z NEXT ADVISORY AT 04/2100Z $$ FORECASTER STEWART
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Tropical Storm Isaias Public Advisory Number 29A
2020-08-04 13:58:42| National Hurricane Center (Atlantic)
Issued at 800 AM EDT Tue Aug 04 2020 000 WTNT34 KNHC 041158 TCPAT4 BULLETIN Tropical Storm Isaias Intermediate Advisory Number 29A NWS National Hurricane Center Miami FL AL092020 800 AM EDT Tue Aug 04 2020 ...CENTER OF ISAIAS MOVING ACROSS SOUTHEASTERN VIRGINIA... ...STRONG WINDS...HEAVY RAINFALL...AND THE THREAT OF TORNADOES WILL SPREAD NORTHWARD ALONG THE MID-ATLANTIC COAST THIS MORNING... SUMMARY OF 800 AM EDT...1200 UTC...INFORMATION ---------------------------------------------- LOCATION...37.7N 76.8W ABOUT 15 MI...20 KM SSE OF TAPPAHANNOCK VIRGINIA MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H PRESENT MOVEMENT...NNE OR 25 DEGREES AT 33 MPH...54 KM/H MINIMUM CENTRAL PRESSURE...993 MB...29.33 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Storm Surge Warning has been discontinued for the Neuse River North Carolina. The Storm Surge Watch has been discontinued. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * Pamlico and Albemarle Sounds * Ocracoke Inlet North Carolina to the North Carolina/Virginia border A Tropical Storm Warning is in effect for... * North of Surf City North Carolina to Eastport 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 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 Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning area, in this case within the next 24 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 800 AM EDT (1200 UTC), the center of Tropical Storm Isaias was located over southeastern Virginia near latitude 37.7 North, longitude 76.8 West. Isaias is moving toward the north-northeast near 33 mph (54 km/h), and this general motion accompanied by some additional increase in forward speed is expected through today. On the forecast track, the center of Isaias will continue to move near or along the coast of the mid-Atlantic states today, and move across the northeastern United States into southern Canada tonight. Maximum sustained winds are near 70 mph (110 km/h) with higher gusts. Only gradual weakening is anticipated while Isaias moves north-northeastward near the mid-Atlantic coast today. A faster rate of weakening is expected to begin tonight, and the system is forecast to become post-tropical tonight or early Wednesday. Tropical-storm-force winds extend outward up to 140 miles (220 km) from the center. Sustained winds of 63 mph (101 km/h) and a gust to 77 mph (124 km/h) were recently reported at Third Island, Virginia, at the mouth of the Chesapeake Bay. The estimated minimum central pressure based on surface observations is 993 mb (29.33 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... Cape Lookout to Ocracoke Inlet NC, including the Neuse River...1-2 ft Ocracoke Inlet to the North Carolina/Virginia border including Pamlico Sound, Albemarle Sound, and Pamlico River...3-5 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 Sound...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: Widespread tropical-storm conditions are expected in the tropical storm warning area from North Carolina through the mid-Atlantic states, including portions of the Chesapeake Bay region today, 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 this afternoon and northern New England tonight. Gale-force winds are expected to spread into southeastern Quebec tonight and Wednesday. See products issued by Environment Canada for more information. RAINFALL: The following rainfall accumulations are expected along and near the track of Isaias: Central and eastern North Carolina into the Mid-Atlantic: 3 to 6 inches, isolated maximum totals 8 inches. Eastern New York into Vermont: 2 to 4 inches, isolated maximum totals 6 inches. Western Connecticut, western Massachusetts, New Hampshire and western Maine: 1 to 3 inches. Heavy rainfall along the East Coast, near the path of Isaias, will result in flash and urban flooding, some of which may be significant in North Carolina through the Mid-Atlantic and Northeast through tonight. Potentially life-threatening urban flooding is possible in D.C., Baltimore, and elsewhere along and just west of the I-95 corridor today. Widespread minor to moderate river flooding is likely across portions of the Carolinas and the Mid-Atlantic. Quick-responding rivers in the Northeast will also be susceptible to minor river flooding. TORNADOES: Tornadoes are most likely through midday from southeast Virginia to New Jersey. Tornadoes will remain possible this afternoon and evening from southeast New York across New England. SURF: Swells generated by Isaias will spread northward along the Mid-Atlantic and Northeast coasts of the United States today. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next complete advisory at 1100 AM EDT. Hourly Tropical Cyclone Update statements will begin at 900 AM EDT. $$ Forecaster Stewart
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Tropical Storm Isaias Wind Speed Probabilities Number 29
2020-08-04 10:51:34| National Hurricane Center (Atlantic)
Issued at 0900 UTC TUE AUG 04 2020 000 FONT14 KNHC 040851 PWSAT4 TROPICAL STORM ISAIAS WIND SPEED PROBABILITIES NUMBER 29 NWS NATIONAL HURRICANE CENTER MIAMI FL AL092020 0900 UTC TUE AUG 04 2020 AT 0900Z THE CENTER OF TROPICAL STORM ISAIAS WAS LOCATED NEAR LATITUDE 36.3 NORTH...LONGITUDE 77.5 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 06Z TUE 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 06Z TUE 18Z TUE 06Z WED 18Z WED 06Z THU 06Z FRI 06Z SAT PERIODS TO TO TO TO TO TO TO 18Z TUE 06Z WED 18Z WED 06Z THU 06Z FRI 06Z SAT 06Z SUN FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT YARMOUTH NS 34 X 3( 3) X( 3) X( 3) X( 3) X( 3) X( 3) ST JOHN NB 34 X 3( 3) X( 3) X( 3) X( 3) X( 3) X( 3) EASTPORT ME 34 X 5( 5) 1( 6) X( 6) X( 6) X( 6) X( 6) BAR HARBOR ME 34 X 9( 9) 1(10) X(10) X(10) X(10) X(10) AUGUSTA ME 34 1 17(18) X(18) X(18) X(18) X(18) X(18) PORTLAND ME 34 2 26(28) X(28) X(28) X(28) X(28) X(28) CONCORD NH 34 3 54(57) X(57) X(57) X(57) X(57) X(57) CONCORD NH 50 X 6( 6) X( 6) X( 6) X( 6) X( 6) X( 6) PORTSMOUTH NH 34 2 32(34) X(34) X(34) X(34) X(34) X(34) WORCESTER MA 34 8 54(62) X(62) X(62) X(62) X(62) X(62) WORCESTER MA 50 X 5( 5) X( 5) X( 5) X( 5) X( 5) X( 5) SPRINGFIELD MA 34 16 65(81) X(81) X(81) X(81) X(81) X(81) SPRINGFIELD MA 50 X 13(13) X(13) X(13) X(13) X(13) X(13) BOSTON MA 34 4 33(37) X(37) X(37) X(37) X(37) X(37) HYANNIS MA 34 4 13(17) X(17) X(17) X(17) X(17) X(17) NANTUCKET MA 34 5 9(14) X(14) X(14) X(14) X(14) X(14) PROVIDENCE RI 34 10 34(44) X(44) X(44) X(44) X(44) X(44) BRIDGEPORT CT 34 72 21(93) X(93) X(93) X(93) X(93) X(93) BRIDGEPORT CT 50 6 20(26) X(26) X(26) X(26) X(26) X(26) NEW HAVEN CT 34 55 34(89) X(89) X(89) X(89) X(89) X(89) NEW HAVEN CT 50 3 16(19) X(19) X(19) X(19) X(19) X(19) HARTFORD CT 34 31 53(84) X(84) X(84) X(84) X(84) X(84) HARTFORD CT 50 1 14(15) X(15) X(15) X(15) X(15) X(15) NEW LONDON CT 34 24 42(66) X(66) X(66) X(66) X(66) X(66) NEW LONDON CT 50 X 5( 5) X( 5) X( 5) X( 5) X( 5) X( 5) ALBANY NY 34 10 67(77) X(77) X(77) X(77) X(77) X(77) ALBANY NY 50 X 10(10) X(10) X(10) X(10) X(10) X(10) ALBANY NY 64 X 1( 1) X( 1) X( 1) X( 1) X( 1) X( 1) POUGHKEEPSIE 34 57 36(93) X(93) X(93) X(93) X(93) X(93) POUGHKEEPSIE 50 5 16(21) X(21) X(21) X(21) X(21) X(21) POUGHKEEPSIE 64 X 2( 2) X( 2) X( 2) X( 2) X( 2) X( 2) MONTAUK POINT 34 25 31(56) X(56) X(56) X(56) X(56) X(56) MONTAUK POINT 50 X 3( 3) X( 3) X( 3) X( 3) X( 3) X( 3) ISLIP NY 34 81 10(91) X(91) X(91) X(91) X(91) X(91) ISLIP NY 50 10 15(25) X(25) X(25) X(25) X(25) X(25) NYC JFK AIRPRT 34 95 2(97) X(97) X(97) X(97) X(97) X(97) NYC JFK AIRPRT 50 26 14(40) X(40) X(40) X(40) X(40) X(40) NYC JFK AIRPRT 64 1 1( 2) X( 2) X( 2) X( 2) X( 2) X( 2) NYC CNTRL PARK 34 94 3(97) X(97) X(97) X(97) X(97) X(97) NYC CNTRL PARK 50 28 10(38) X(38) X(38) X(38) X(38) X(38) NYC CNTRL PARK 64 1 2( 3) X( 3) X( 3) X( 3) X( 3) X( 3) NEWARK NJ 34 95 3(98) X(98) X(98) X(98) X(98) X(98) NEWARK NJ 50 31 6(37) X(37) X(37) X(37) X(37) X(37) NEWARK NJ 64 1 2( 3) X( 3) X( 3) X( 3) X( 3) X( 3) TRENTON NJ 34 97 X(97) X(97) X(97) X(97) X(97) X(97) TRENTON NJ 50 35 1(36) X(36) X(36) X(36) X(36) X(36) TRENTON NJ 64 4 X( 4) X( 4) X( 4) X( 4) X( 4) X( 4) NWS EARLE NJ 34 98 X(98) X(98) X(98) X(98) X(98) X(98) NWS EARLE NJ 50 38 7(45) X(45) X(45) X(45) X(45) X(45) NWS EARLE NJ 64 2 X( 2) X( 2) X( 2) X( 2) X( 2) X( 2) ALLENTOWN PA 34 83 X(83) X(83) X(83) X(83) X(83) X(83) ALLENTOWN PA 50 17 X(17) X(17) X(17) X(17) X(17) X(17) ALLENTOWN PA 64 1 1( 2) X( 2) X( 2) X( 2) X( 2) X( 2) PHILADELPHIA 34 98 X(98) X(98) X(98) X(98) X(98) X(98) PHILADELPHIA 50 36 X(36) X(36) X(36) X(36) X(36) X(36) PHILADELPHIA 64 4 X( 4) X( 4) X( 4) X( 4) X( 4) X( 4) ATLANTIC CITY 34 99 X(99) X(99) X(99) X(99) X(99) X(99) ATLANTIC CITY 50 53 X(53) X(53) X(53) X(53) X(53) X(53) ATLANTIC CITY 64 3 X( 3) X( 3) X( 3) X( 3) X( 3) X( 3) BALTIMORE MD 34 60 X(60) X(60) X(60) X(60) X(60) X(60) BALTIMORE MD 50 11 X(11) X(11) X(11) X(11) X(11) X(11) DOVER DE 34 99 X(99) X(99) X(99) X(99) X(99) X(99) DOVER DE 50 47 X(47) X(47) X(47) X(47) X(47) X(47) DOVER DE 64 4 X( 4) X( 4) X( 4) X( 4) X( 4) X( 4) ANNAPOLIS MD 34 84 X(84) X(84) X(84) X(84) X(84) X(84) ANNAPOLIS MD 50 13 X(13) X(13) X(13) X(13) X(13) X(13) WASHINGTON DC 34 43 X(43) X(43) X(43) X(43) X(43) X(43) WASHINGTON DC 50 6 X( 6) X( 6) X( 6) X( 6) X( 6) X( 6) CAPE HENLOPEN 34 99 X(99) X(99) X(99) X(99) X(99) X(99) CAPE HENLOPEN 50 66 X(66) X(66) X(66) X(66) X(66) X(66) CAPE HENLOPEN 64 2 X( 2) X( 2) X( 2) X( 2) X( 2) X( 2) OCEAN CITY MD 34 99 X(99) X(99) X(99) X(99) X(99) X(99) OCEAN CITY MD 50 65 X(65) X(65) X(65) X(65) X(65) X(65) OCEAN CITY MD 64 1 X( 1) X( 1) X( 1) X( 1) X( 1) X( 1) PAX RIVER NAS 34 99 X(99) X(99) X(99) X(99) X(99) X(99) PAX RIVER NAS 50 20 X(20) X(20) X(20) X(20) X(20) X(20) PAX RIVER NAS 64 1 X( 1) X( 1) X( 1) X( 1) X( 1) X( 1) WALLOPS CDA 34 99 X(99) X(99) X(99) X(99) X(99) X(99) WALLOPS CDA 50 73 X(73) X(73) X(73) X(73) X(73) X(73) WALLOPS CDA 64 1 X( 1) X( 1) X( 1) X( 1) X( 1) X( 1) RICHMOND VA 34 95 X(95) X(95) X(95) X(95) X(95) X(95) RICHMOND VA 50 8 X( 8) X( 8) X( 8) X( 8) X( 8) X( 8) NORFOLK NAS 34 99 X(99) X(99) X(99) X(99) X(99) X(99) NORFOLK NAS 50 92 X(92) X(92) X(92) X(92) X(92) X(92) NORFOLK NAS 64 1 X( 1) X( 1) X( 1) X( 1) X( 1) X( 1) NORFOLK VA 34 99 X(99) X(99) X(99) X(99) X(99) X(99) NORFOLK VA 50 91 X(91) X(91) X(91) X(91) X(91) X(91) NORFOLK VA 64 1 X( 1) X( 1) X( 1) X( 1) X( 1) X( 1) OCEANA NAS VA 34 99 X(99) X(99) X(99) X(99) X(99) X(99) OCEANA NAS VA 50 74 X(74) X(74) X(74) X(74) X(74) X(74) ELIZABETH CTY 34 99 X(99) X(99) X(99) X(99) X(99) X(99) ELIZABETH CTY 50 40 X(40) X(40) X(40) X(40) X(40) X(40) ROCKY MT NC 34 99 X(99) X(99) X(99) X(99) X(99) X(99) CAPE HATTERAS 34 61 X(61) X(61) X(61) X(61) X(61) X(61) CHERRY PT NC 34 99 X(99) X(99) X(99) X(99) X(99) X(99) NEW RIVER NC 34 99 X(99) X(99) X(99) X(99) X(99) X(99) NEW RIVER NC 50 99 X(99) X(99) X(99) X(99) X(99) X(99) MOREHEAD CITY 34 99 X(99) X(99) X(99) X(99) X(99) X(99) SURF CITY NC 34 99 X(99) X(99) X(99) X(99) X(99) X(99) WILMINGTON NC 34 99 X(99) X(99) X(99) X(99) X(99) X(99) BALD HEAD ISL 34 99 X(99) X(99) X(99) X(99) X(99) X(99) $$ FORECASTER BROWN
Tropical Storm Isaias Forecast Discussion Number 29
2020-08-04 10:51:33| National Hurricane Center (Atlantic)
Issued at 500 AM EDT Tue Aug 04 2020 000 WTNT44 KNHC 040851 TCDAT4 Tropical Storm Isaias Discussion Number 29 NWS National Hurricane Center Miami FL AL092020 500 AM EDT Tue Aug 04 2020 Isaias made landfall near Ocean Isle Beach, North Carolina, a few minutes after the previous advisory package was issued. Since that time, the center of Isaias has been moving quickly north-northeastward across eastern North Carolina. Now that the inner core of Isaias has moved inland, the peak surface winds have decreased despite Doppler radar data still showing an area of 75-85 kt winds aloft. The latest surface observations indicated that strong winds are occuring over the North Carolina Sounds and Outer Banks. Based on a blend of the available data, the initial wind speed is set at 60 kt for this advisory. As the tropical storm moves northward near the Mid-Atlantic coast, interaction with a strong jet stream is likely to result in a slower-than-typical weakening rate. The global model guidance indicates that Isaias is likely to produce widespread tropical-storm conditions, with hurricane-force wind gusts possible along the mid-Atlantic coast through this afternoon. As a result, the gust factor at 12 h has been increased above the standard 20 percent in the Forecast/Advisory (TCMAT4). Isaias is forecast to weaken more quickly tonight as it moves into eastern Canada and becomes post-tropical. The post-tropical cyclone is forecast to be absorbed by a larger extratropical low in 2-3 days, if not sooner. Isaias is moving north-northeastward or 020/24 kt. The cyclone is forecast to continue accelerating north-northeastward today as it is embedded in strong south-southwesterly flow ahead of a deep-layer trough over the Great Lakes region. After 24 h, the post-tropical cyclone is expected to decelerate before it is absorbed by the extratropical low. The updated NHC track forecast is near the center of the tightly clustered guidance envelope. In addition to the storm surge and wind threats, Isaias is expected to produce heavy rainfall along and just west of the I-95 corridor today, and the Weather Prediction Center has placed a portion of this area in a high risk for life-threatening flash flooding. There is also a risk of tornadoes from southeast Virginia to New Jersey through midday. The risk of tornadoes will spread northward into southeastern New York this afternoon and across New England by tonight. Key Messages: 1. There is the danger of life-threatening storm surge inundation along portions of the immediate coastline and adjacent waterways of the North Carolina coast, including portions of Pamlico and Albemarle Sounds. Residents in these areas should follow advice given by local emergency officials. 2. Isaias is expected to bring widespread sustained tropical storm force winds and wind gusts to hurricane force to the mid-Atlantic coast, including portions of the Chesapeake Bay region, through this afternoon, which could cause tree damage and power outages. Tropical storm conditions are expected to spread across New England tonight. 3. Heavy rainfall along the East Coast, near the path of Isaias, will result in flash flooding, some of which may be significant in North Carolina through the Mid-Atlantic and Northeast through tonight. Potentially life-threatening urban flooding is possible in D.C., Baltimore, and elsewhere along and just west of the I-95 corridor today. Widespread minor to moderate river flooding is likely across portions of the Carolinas and the Mid-Atlantic. Quick-responding rivers in Northeast will also be susceptible to minor river flooding. 4. Tornadoes have already occurred over portions of northeastern North Carolina and southeastern Virginia overnight. The threat of tornadoes will spread northward along the mid-Atlantic coast today and then across New England by tonight. FORECAST POSITIONS AND MAX WINDS INIT 04/0900Z 36.3N 77.5W 60 KT 70 MPH...INLAND 12H 04/1800Z 40.3N 75.0W 55 KT 65 MPH...INLAND 24H 05/0600Z 45.8N 72.1W 35 KT 40 MPH...POST-TROP/INLAND 36H 05/1800Z 50.3N 70.3W 30 KT 35 MPH...POST-TROP/EXTRATROP 48H 06/0600Z 53.2N 69.5W 20 KT 25 MPH...POST-TROP/EXTRATROP 60H 06/1800Z...DISSIPATED $$ Forecaster Brown/Berg
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