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Hurricane Delta Wind Speed Probabilities Number 18
2020-10-09 04:35:59| National Hurricane Center (Atlantic)
Issued at 0300 UTC FRI OCT 09 2020 000 FONT11 KNHC 090235 PWSAT1 HURRICANE DELTA WIND SPEED PROBABILITIES NUMBER 18 NWS NATIONAL HURRICANE CENTER MIAMI FL AL262020 0300 UTC FRI OCT 09 2020 AT 0300Z THE CENTER OF HURRICANE DELTA WAS LOCATED NEAR LATITUDE 25.7 NORTH...LONGITUDE 93.6 WEST WITH MAXIMUM SUSTAINED WINDS NEAR 105 KTS...120 MPH...195 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 00Z FRI 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 00Z FRI 12Z FRI 00Z SAT 12Z SAT 00Z SUN 00Z MON 00Z TUE PERIODS TO TO TO TO TO TO TO 12Z FRI 00Z SAT 12Z SAT 00Z SUN 00Z MON 00Z TUE 00Z WED FORECAST HOUR (12) (24) (36) (48) (72) (96) (120) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - LOCATION KT BIRMINGHAM AL 34 X X( X) 2( 2) X( 2) 1( 3) X( 3) X( 3) WHITING FLD FL 34 X 1( 1) 3( 4) X( 4) 1( 5) X( 5) X( 5) PENSACOLA FL 34 X 2( 2) 3( 5) X( 5) X( 5) X( 5) X( 5) MOBILE AL 34 X 4( 4) 4( 8) X( 8) X( 8) X( 8) X( 8) GULFPORT MS 34 X 9( 9) 8(17) 1(18) X(18) X(18) X(18) STENNIS MS 34 1 13(14) 14(28) X(28) X(28) X(28) X(28) STENNIS MS 50 X 1( 1) 2( 3) X( 3) X( 3) X( 3) X( 3) BURAS LA 34 2 13(15) 8(23) X(23) X(23) X(23) X(23) GFMX 280N 890W 34 2 5( 7) 2( 9) X( 9) X( 9) X( 9) X( 9) JACKSON MS 34 X 8( 8) 30(38) 5(43) X(43) X(43) X(43) JACKSON MS 50 X X( X) 3( 3) 1( 4) X( 4) X( 4) X( 4) NEW ORLEANS LA 34 2 32(34) 16(50) 1(51) X(51) X(51) X(51) NEW ORLEANS LA 50 X 2( 2) 3( 5) X( 5) X( 5) X( 5) X( 5) GFMX 280N 910W 34 18 35(53) 1(54) X(54) X(54) X(54) X(54) GFMX 280N 910W 50 1 4( 5) X( 5) X( 5) X( 5) X( 5) X( 5) BATON ROUGE LA 34 2 64(66) 19(85) X(85) X(85) X(85) X(85) BATON ROUGE LA 50 X 9( 9) 12(21) 1(22) X(22) X(22) X(22) BATON ROUGE LA 64 X 2( 2) 6( 8) X( 8) X( 8) X( 8) X( 8) MORGAN CITY LA 34 2 72(74) 9(83) X(83) X(83) X(83) X(83) MORGAN CITY LA 50 X 12(12) 5(17) X(17) X(17) X(17) X(17) MORGAN CITY LA 64 X 3( 3) 4( 7) X( 7) X( 7) X( 7) X( 7) ALEXANDRIA LA 34 2 62(64) 29(93) X(93) X(93) X(93) X(93) ALEXANDRIA LA 50 X 13(13) 42(55) X(55) X(55) X(55) X(55) ALEXANDRIA LA 64 X 3( 3) 18(21) X(21) X(21) X(21) X(21) LAFAYETTE LA 34 2 91(93) 5(98) X(98) X(98) X(98) X(98) LAFAYETTE LA 50 X 40(40) 24(64) 1(65) X(65) X(65) X(65) LAFAYETTE LA 64 X 16(16) 18(34) X(34) X(34) X(34) X(34) NEW IBERIA LA 34 3 90(93) 4(97) X(97) X(97) X(97) X(97) NEW IBERIA LA 50 X 37(37) 17(54) X(54) X(54) X(54) X(54) NEW IBERIA LA 64 X 13(13) 13(26) X(26) X(26) X(26) X(26) GFMX 280N 930W 34 99 X(99) X(99) X(99) X(99) X(99) X(99) GFMX 280N 930W 50 55 35(90) X(90) X(90) X(90) X(90) X(90) GFMX 280N 930W 64 15 54(69) X(69) X(69) X(69) X(69) X(69) SHREVEPORT LA 34 X 10(10) 13(23) X(23) X(23) X(23) X(23) SHREVEPORT LA 50 X 1( 1) 2( 3) X( 3) X( 3) X( 3) X( 3) FORT POLK LA 34 2 71(73) 16(89) X(89) X(89) X(89) X(89) FORT POLK LA 50 X 20(20) 27(47) X(47) X(47) X(47) X(47) FORT POLK LA 64 X 5( 5) 12(17) X(17) X(17) X(17) X(17) LAKE CHARLES 34 4 91(95) 2(97) X(97) X(97) X(97) X(97) LAKE CHARLES 50 X 64(64) 14(78) 1(79) X(79) X(79) X(79) LAKE CHARLES 64 X 32(32) 20(52) X(52) X(52) X(52) X(52) CAMERON LA 34 19 80(99) X(99) X(99) X(99) X(99) X(99) CAMERON LA 50 2 83(85) 3(88) X(88) X(88) X(88) X(88) CAMERON LA 64 X 60(60) 6(66) X(66) X(66) X(66) X(66) JASPER TX 34 2 59(61) 12(73) X(73) X(73) X(73) X(73) JASPER TX 50 X 11(11) 8(19) X(19) X(19) X(19) X(19) JASPER TX 64 X 2( 2) 3( 5) X( 5) X( 5) X( 5) X( 5) KOUNTZE TX 34 3 66(69) 4(73) X(73) 1(74) X(74) X(74) KOUNTZE TX 50 X 14(14) 4(18) X(18) X(18) X(18) X(18) KOUNTZE TX 64 X 3( 3) 2( 5) X( 5) X( 5) X( 5) X( 5) PORT ARTHUR TX 34 5 81(86) 2(88) X(88) X(88) X(88) X(88) PORT ARTHUR TX 50 X 38(38) 6(44) X(44) X(44) X(44) X(44) PORT ARTHUR TX 64 X 12(12) 5(17) X(17) X(17) X(17) X(17) GALVESTON TX 34 26 48(74) X(74) X(74) X(74) X(74) X(74) GALVESTON TX 50 2 12(14) X(14) X(14) X(14) X(14) X(14) GALVESTON TX 64 X 3( 3) X( 3) X( 3) X( 3) X( 3) X( 3) HOUSTON TX 34 2 18(20) 4(24) X(24) X(24) X(24) X(24) HOUSTON TX 50 X 3( 3) X( 3) X( 3) X( 3) X( 3) X( 3) AUSTIN TX 34 1 2( 3) 1( 4) X( 4) X( 4) X( 4) X( 4) SAN ANTONIO TX 34 1 2( 3) X( 3) X( 3) X( 3) X( 3) X( 3) FREEPORT TX 34 7 14(21) 2(23) X(23) X(23) X(23) X(23) FREEPORT TX 50 X 3( 3) X( 3) X( 3) X( 3) X( 3) X( 3) GFMX 280N 950W 34 84 3(87) X(87) X(87) X(87) X(87) X(87) GFMX 280N 950W 50 9 5(14) X(14) X(14) X(14) X(14) X(14) GFMX 280N 950W 64 2 1( 3) X( 3) X( 3) X( 3) X( 3) X( 3) HIGH ISLAND TX 34 9 69(78) 1(79) X(79) X(79) X(79) X(79) HIGH ISLAND TX 50 X 19(19) 1(20) X(20) X(20) X(20) X(20) HIGH ISLAND TX 64 X 4( 4) 2( 6) X( 6) X( 6) X( 6) X( 6) MATAGORDA TX 34 7 6(13) 1(14) X(14) X(14) X(14) X(14) MATAGORDA TX 50 1 2( 3) X( 3) X( 3) X( 3) X( 3) X( 3) PORT O CONNOR 34 4 4( 8) 1( 9) X( 9) X( 9) X( 9) X( 9) ROCKPORT TX 34 2 2( 4) 1( 5) X( 5) X( 5) X( 5) X( 5) CORPUS CHRISTI 34 2 2( 4) X( 4) X( 4) X( 4) X( 4) X( 4) GFMX 270N 960W 34 10 3(13) X(13) X(13) X(13) X(13) X(13) GFMX 250N 960W 34 2 2( 4) X( 4) X( 4) X( 4) X( 4) X( 4) PENSACOLA NAS 34 X 3( 3) 2( 5) X( 5) X( 5) X( 5) X( 5) KEESLER AB 34 1 8( 9) 6(15) X(15) X(15) X(15) X(15) $$ FORECASTER PASCH
Hurricane Delta Public Advisory Number 18
2020-10-09 04:35:56| National Hurricane Center (Atlantic)
Issued at 1000 PM CDT Thu Oct 08 2020 000 WTNT31 KNHC 090235 TCPAT1 BULLETIN Hurricane Delta Advisory Number 18 NWS National Hurricane Center Miami FL AL262020 1000 PM CDT Thu Oct 08 2020 ...DELTA STRENGTHENS A LITTLE MORE... ...EXPECTED TO BRING HURRICANE CONDITIONS AND A LIFE-THREATENING STORM SURGE TO PORTIONS OF THE NORTHERN GULF COAST ON FRIDAY... SUMMARY OF 1000 PM CDT...0300 UTC...INFORMATION ----------------------------------------------- LOCATION...25.7N 93.6W ABOUT 285 MI...455 KM S OF CAMERON LOUISIANA MAXIMUM SUSTAINED WINDS...120 MPH...195 KM/H PRESENT MOVEMENT...NNW OR 340 DEGREES AT 12 MPH...19 KM/H MINIMUM CENTRAL PRESSURE...955 MB...28.20 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * High Island Texas to Ocean Springs Mississippi including Calcasieu Lake, Vermilion Bay, Lake Pontchartrain, Lake Maurepas, and Lake Borgne A Hurricane Warning is in effect for... * High Island Texas to Morgan City Louisiana A Tropical Storm Warning is in effect for... * West of High Island to Sargent Texas * East of Morgan City Louisiana to the mouth of the Pearl River, including New Orleans * Lake Pontchartrain and Lake Maurepas A Tropical Storm Watch is in effect for... * East of the mouth of the Pearl River to Bay St. Louis Mississippi 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, available 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 Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. A warning is typically issued 36 hours before the anticipated first occurrence of tropical-storm- force winds, conditions that make outside preparations difficult or dangerous. 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. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area. 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 1000 PM CDT (0300 UTC), the center of Hurricane Delta was located near latitude 25.7 North, longitude 93.6 West. Delta is moving toward the north-northwest near 12 mph (19 km/h). A turn toward the north is forecast overnight, followed by a north-northeastward motion Friday and Friday night. On the forecast track, the center of Delta will move over the northwestern Gulf of Mexico on Friday, and then move inland within the hurricane warning area Friday afternoon or Friday night. Maximum sustained winds have increased to near 120 mph (195 km/h) with higher gusts. Delta is a category 3 hurricane on the Saffir-Simpson Hurricane Wind Scale. Some slight additional strengthening is possible overnight. Weakening is expected to begin as Delta approaches the northern Gulf coast on Friday, with rapid weakening expected after the center moves inland. Hurricane-force winds extend outward up to 40 miles (65 km) from the center and tropical-storm-force winds extend outward up to 160 miles (260 km). NOAA buoy 42002 near Delta's northwestern eyewall recently reported a sustained wind of 63 mph (101 km/h) and a wind gust to 76 mph (122 km/h). The buoy also reported a significant wave height just over 29 feet (almost 9 meters). The minimum central pressure reported by an Air Force Hurricane Hunter Aircraft is 955 mb (28.20 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Delta can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT1, WMO header WTNT41 KNHC, and on the web at www.hurricanes.gov/text/MIATCDAT1.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... Rockefeller Wildlife Refuge, LA to Morgan City, LA including Vermilion Bay...7-11 ft Holly Beach, LA to Rockefeller Wildlife Refuge, LA...5-8 ft Sabine Pass to Holly Beach, LA...4-7 ft Morgan City, LA to Port Fourchon, LA...4-7 ft Port Fourchon, LA to the Mouth of the Mississippi River...3-5 ft Calcasieu Lake...3-5 ft High Island, TX to Sabine Pass...2-4 ft Mouth of the Mississippi River to Ocean Springs, MS...2-4 ft Lake Borgne, Lake Pontchartrain, and Lake Maurepas...2-4 ft Ocean Springs, MS to the AL/FL border including Mobile Bay...1-3 ft Sabine Lake...1-3 ft Port O'Connor, TX to High Island, TX including Galveston Bay... 1-3 ft It is important to note that small changes in the track, structure, or intensity of Delta could have large impacts on where the highest storm surge occurs. Users are urged to stay tuned for possible changes and updates. The deepest water will occur along the immediate coast near and to the east of the landfall location, where the surge will be accompanied by large and dangerous 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 by Friday afternoon or evening, with tropical storm conditions expected within this area by early Friday. Tropical storm conditions are expected within the tropical storm warning areas on Friday, and are possible within the tropical storm watch area Friday night. RAINFALL: Friday through Saturday, Delta is expected to produce 5 to 10 inches of rain, with isolated maximum totals of 15 inches, from southwest into south-central Louisiana. These rainfall amounts will lead to significant flash, urban, small stream flooding, along with minor to major river flooding. For extreme east Texas into northern Louisiana, southern Arkansas and western Mississippi, Delta is expected to produce 3 to 6 inches of rain, with isolated maximum totals of 10 inches. These rainfall amounts will lead to flash, urban, small stream and isolated minor river flooding. As Delta moves farther inland, 1 to 3 inches of rain, with locally higher amounts, are expected in the Tennessee Valley and Mid- Atlantic this weekend. TORNADOES: There is a risk of a few tornadoes beginning late tonight and continuing through Friday over southern portions of Louisiana and Mississippi. SURF: Swells from Delta are affecting portions of the northern and western Gulf coast. These swells are likely to cause life-threatening surf and rip current conditions. Please consult products from your local weather office. NEXT ADVISORY ------------- Next intermediate advisory at 100 AM CDT. Next complete advisory at 400 AM CDT. $$ Forecaster Pasch
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Hurricane Delta Forecast Advisory Number 18
2020-10-09 04:35:24| National Hurricane Center (Atlantic)
Issued at 0300 UTC FRI OCT 09 2020 000 WTNT21 KNHC 090235 TCMAT1 HURRICANE DELTA FORECAST/ADVISORY NUMBER 18 NWS NATIONAL HURRICANE CENTER MIAMI FL AL262020 0300 UTC FRI OCT 09 2020 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... NONE. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A STORM SURGE WARNING IS IN EFFECT FOR... * HIGH ISLAND TEXAS TO OCEAN SPRINGS MISSISSIPPI INCLUDING CALCASIEU LAKE...VERMILION BAY...LAKE PONTCHARTRAIN...LAKE MAUREPAS...AND LAKE BORGNE A HURRICANE WARNING IS IN EFFECT FOR... * HIGH ISLAND TEXAS TO MORGAN CITY LOUISIANA A TROPICAL STORM WARNING IS IN EFFECT FOR... * WEST OF HIGH ISLAND TO SARGENT TEXAS * EAST OF MORGAN CITY LOUISIANA TO THE MOUTH OF THE PEARL RIVER...INCLUDING NEW ORLEANS * LAKE PONTCHARTRAIN AND LAKE MAUREPAS A TROPICAL STORM WATCH IS IN EFFECT FOR... * EAST OF THE MOUTH OF THE PEARL RIVER TO BAY ST. LOUIS MISSISSIPPI 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...AVAILABLE 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 HURRICANE WARNING MEANS THAT HURRICANE CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA. A WARNING IS TYPICALLY ISSUED 36 HOURS BEFORE THE ANTICIPATED FIRST OCCURRENCE OF TROPICAL-STORM- FORCE WINDS...CONDITIONS THAT MAKE OUTSIDE PREPARATIONS DIFFICULT OR DANGEROUS. 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. A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA. HURRICANE CENTER LOCATED NEAR 25.7N 93.6W AT 09/0300Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE NORTH-NORTHWEST OR 340 DEGREES AT 10 KT ESTIMATED MINIMUM CENTRAL PRESSURE 955 MB MAX SUSTAINED WINDS 105 KT WITH GUSTS TO 130 KT. 64 KT....... 35NE 30SE 25SW 25NW. 50 KT....... 50NE 40SE 40SW 50NW. 34 KT.......140NE 130SE 80SW 110NW. 12 FT SEAS..180NE 150SE 180SW 180NW. 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 25.7N 93.6W AT 09/0300Z AT 09/0000Z CENTER WAS LOCATED NEAR 25.3N 93.5W FORECAST VALID 09/1200Z 27.4N 93.7W MAX WIND 105 KT...GUSTS 130 KT. 64 KT... 35NE 30SE 25SW 25NW. 50 KT... 60NE 50SE 40SW 50NW. 34 KT...140NE 130SE 90SW 120NW. FORECAST VALID 10/0000Z 29.8N 93.0W...INLAND MAX WIND 85 KT...GUSTS 105 KT. 64 KT... 30NE 30SE 25SW 25NW. 50 KT... 50NE 50SE 40SW 40NW. 34 KT...100NE 140SE 90SW 90NW. FORECAST VALID 10/1200Z 32.0N 91.9W...INLAND MAX WIND 45 KT...GUSTS 55 KT. 34 KT... 60NE 60SE 40SW 40NW. FORECAST VALID 11/0000Z 33.5N 90.2W...INLAND MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 11/1200Z 34.9N 88.4W...POST-TROP/REMNT LOW MAX WIND 20 KT...GUSTS 30 KT. FORECAST VALID 12/0000Z 36.5N 87.0W...POST-TROP/REMNT LOW MAX WIND 20 KT...GUSTS 30 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 13/0000Z...DISSIPATED REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 25.7N 93.6W INTERMEDIATE PUBLIC ADVISORY...WTNT31 KNHC/MIATCPAT1...AT 09/0600Z NEXT ADVISORY AT 09/0900Z $$ FORECASTER PASCH
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Hurricane Delta Public Advisory Number 17A
2020-10-09 01:53:21| National Hurricane Center (Atlantic)
Issued at 700 PM CDT Thu Oct 08 2020 000 WTNT31 KNHC 082353 TCPAT1 BULLETIN Hurricane Delta Intermediate Advisory Number 17A NWS National Hurricane Center Miami FL AL262020 700 PM CDT Thu Oct 08 2020 ...DELTA EXPECTED TO BRING HURRICANE CONDITIONS AND A LIFE-THREATENING STORM SURGE TO PORTIONS OF THE NORTHERN GULF COAST ON FRIDAY... SUMMARY OF 700 PM CDT...0000 UTC...INFORMATION ---------------------------------------------- LOCATION...25.3N 93.5W ABOUT 310 MI...500 KM S OF CAMERON LOUISIANA MAXIMUM SUSTAINED WINDS...115 MPH...185 KM/H PRESENT MOVEMENT...NNW OR 330 DEGREES AT 12 MPH...19 KM/H MINIMUM CENTRAL PRESSURE...956 MB...28.23 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * High Island Texas to Ocean Springs Mississippi including Calcasieu Lake, Vermilion Bay, Lake Pontchartrain, Lake Maurepas, and Lake Borgne A Hurricane Warning is in effect for... * High Island Texas to Morgan City Louisiana A Tropical Storm Warning is in effect for... * West of High Island to Sargent Texas * East of Morgan City Louisiana to the mouth of the Pearl River, including New Orleans * Lake Pontchartrain and Lake Maurepas A Tropical Storm Watch is in effect for... * East of the mouth of the Pearl River to Bay St. Louis Mississippi 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, available 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 Hurricane Warning means that hurricane conditions are expected somewhere within the warning area. A warning is typically issued 36 hours before the anticipated first occurrence of tropical-storm- force winds, conditions that make outside preparations difficult or dangerous. 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. A Tropical Storm Watch means that tropical storm conditions are possible within the watch area. 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 700 PM CDT (0000 UTC), the center of Hurricane Delta was located near latitude 25.3 North, longitude 93.5 West. Delta is moving toward the north-northwest near 12 mph (19 km/h). A turn toward the north is forecast overnight, followed by a north-northeastward motion Friday and Friday night. On the forecast track, the center of Delta will move over the northwestern Gulf of Mexico on Friday, and then move inland within the hurricane warning area Friday afternoon or Friday night. Maximum sustained winds are near 115 mph (185 km/h) with higher gusts. Delta is a category 3 hurricane on the Saffir-Simpson Hurricane Wind Scale. Additional strengthening is possible tonight. Some weakening is anticipated as Delta approaches the northern Gulf coast on Friday, with rapid weakening expected after the center moves inland. Hurricane-force winds extend outward up to 35 miles (55 km) from the center and tropical-storm-force winds extend outward up to 160 miles (260 km). NOAA buoy 42002, just to the north of Delta's center, recently measured a sustained wind of 54 mph (86 km/h) and a wind gust to 65 mph (104 km/h). The minimum central pressure estimated from Hurricane Hunter observations is 956 mb (28.23 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Delta can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT1, WMO header WTNT41 KNHC, and on the web at www.hurricanes.gov/text/MIATCDAT1.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... Rockefeller Wildlife Refuge, LA to Morgan City, LA including Vermilion Bay...7-11 ft Holly Beach, LA to Rockefeller Wildlife Refuge, LA...5-8 ft Sabine Pass to Holly Beach, LA...4-7 ft Morgan City, LA to Port Fourchon, LA...4-7 ft Port Fourchon, LA to the Mouth of the Mississippi River...3-5 ft Calcasieu Lake...3-5 ft High Island, TX to Sabine Pass...2-4 ft Mouth of the Mississippi River to Ocean Springs, MS...2-4 ft Lake Borgne, Lake Pontchartrain, and Lake Maurepas...2-4 ft Ocean Springs, MS to the AL/FL border including Mobile Bay...1-3 ft Sabine Lake...1-3 ft Port O'Connor, TX to High Island, TX including Galveston Bay... 1-3 ft It is important to note that small changes in the track, structure, or intensity of Delta could have large impacts on where the highest storm surge occurs. Users are urged to stay tuned for possible changes and updates. The deepest water will occur along the immediate coast near and to the east of the landfall location, where the surge will be accompanied by large and dangerous 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 by Friday afternoon or evening, with tropical storm conditions expected within this area by early Friday. Tropical storm conditions are expected within the tropical storm warning areas on Friday, and are possible within the tropical storm watch area Friday night. RAINFALL: Friday through Saturday, Delta is expected to produce 5 to 10 inches of rain, with isolated maximum totals of 15 inches, from southwest into south-central Louisiana. These rainfall amounts will lead to significant flash, urban, small stream flooding, along with minor to major river flooding. For extreme east Texas into northern Louisiana, southern Arkansas and western Mississippi, Delta is expected to produce 3 to 6 inches of rain, with isolated maximum totals of 10 inches. These rainfall amounts will lead to flash, urban, small stream and isolated minor river flooding. As Delta moves farther inland, 1 to 3 inches of rain, with locally higher amounts, are expected in the Tennessee Valley and Mid- Atlantic this weekend. TORNADOES: There is a risk of a few tornadoes beginning late tonight and continuing through Friday over southern portions of Louisiana and Mississippi. SURF: Swells from Delta will begin to affect portions of the northern and western Gulf coast during the next several hours. 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 1000 PM CDT. $$ Forecaster Pasch
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Hurricane Delta Forecast Discussion Number 17
2020-10-08 23:00:24| National Hurricane Center (Atlantic)
Issued at 400 PM CDT Thu Oct 08 2020 000 WTNT41 KNHC 082100 TCDAT1 Hurricane Delta Discussion Number 17 NWS National Hurricane Center Miami FL AL262020 400 PM CDT Thu Oct 08 2020 Delta is strengthening. In satellite imagery, an eye is now seen in the cold cloud tops of the central dense overcast. On the aircraft side, just received reports from an Air Force Reserve Hurricane Hunter aircraft included 700-mb flight-level winds of 119 kt, SFMR winds estimates near 90 kt, and a central pressure of 959 mb inside a 30 n mi wide eye. A blend of the flight-level and SFMR wind estimates give an initial intensity of 100 kt, and Delta is again a major hurricane. The initial motion is now northwestward or 320/10 kt. There is no change to the track forecast philosophy and little change to the track forecast from the previous advisory. During the next 12-24 h, Delta should turn to the north between a mid- to upper-level ridge over the Florida Peninsula and eastern Gulf of Mexico and a mid- to upper-level level trough over the U.S. Southern Plains. This should be followed by a north-northeastward motion that is expected to bring the center near or over the northern Gulf coast, most likely in southwestern Louisiana, in about 30 h. After landfall, the cyclone should move northeastward through the Lower Mississippi and Tennessee Valleys along the southern edge of the mid-latitude westerlies until it dissipates. The track guidance remains very tightly clustered in terms of direction, and the new forecast track is near the various consensus models. Shear, sea surface temperature, and moisture conditions appear favorable for strengthening during the next 12 h or so, and based on this additional intensification is expected tonight. A short period of rapid intensification remains possible given current trends, although the various rapid intensification indices are not enthusiastic about the possibilities of this, After 12 h, the global models again forecast strong southwesterly shear developing over the hurricane before landfall, and based on this some weakening is forecast. Rapid weakening is expected after landfall. The system is expected to weaken to a depression no later than 60 h and degenerate to a remnant low by 72 h, with dissipation following shortly thereafter. The intensity forecast lies at or above the upper edge of the intensity guidance. Recent scatterometer data indicates that Delta is growing in size as it approaches the Louisiana coast. The NHC wind radii forecast again follows a combination of the data and the forecasts from global and hurricane regional models. Key Messages: 1. Life-threatening storm surge is expected near and east of where Delta makes landfall Friday, and a Storm Surge Warning is in effect from High Island, Texas, to Ocean Springs, Mississippi. The highest inundation of 7 to 11 feet is expected somewhere between Rockefeller Wildlife Refuge and Morgan City, Louisiana. Residents in the warning area should promptly follow advice given by local officials. The storm surge risk remains high despite the forecast decrease in intensity before landfall since Delta is expected to grow in size. 2. Hurricane-force winds are expected Friday afternoon and evening somewhere within the Hurricane Warning area between High Island, Texas, and Morgan City, Louisiana. Hurricane force winds will also spread inland across portions of southern Louisiana near the path of Deltas center Friday evening and Friday night. 3. Heavy rainfall will lead to significant flash flooding and minor to major river flooding in parts of Louisiana Friday and Saturday. Additional flooding is expected across portions of the central Gulf Coast into the Lower Mississippi Valley. FORECAST POSITIONS AND MAX WINDS INIT 08/2100Z 24.8N 93.4W 100 KT 115 MPH 12H 09/0600Z 26.3N 93.9W 110 KT 125 MPH 24H 09/1800Z 28.6N 93.5W 105 KT 120 MPH 36H 10/0600Z 31.0N 92.5W 65 KT 75 MPH...INLAND 48H 10/1800Z 32.9N 91.1W 40 KT 45 MPH...INLAND 60H 11/0600Z 34.3N 89.2W 30 KT 35 MPH...INLAND 72H 11/1800Z 35.8N 87.2W 20 KT 25 MPH...POST-TROP/INLAND 96H 12/1800Z...DISSIPATED $$ Forecaster Beven
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