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Hurricane Laura Forecast Advisory Number 26
2020-08-26 10:56:26| National Hurricane Center (Atlantic)
Issued at 0900 UTC WED AUG 26 2020 000 WTNT23 KNHC 260856 TCMAT3 HURRICANE LAURA FORECAST/ADVISORY NUMBER 26 NWS NATIONAL HURRICANE CENTER MIAMI FL AL132020 0900 UTC WED AUG 26 2020 CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY... A STORM SURGE WARNING HAS BEEN ISSUED FROM FREEPORT TO SAN LUIS PASS TEXAS. SUMMARY OF WATCHES AND WARNINGS IN EFFECT... A STORM SURGE WARNING IS IN EFFECT FOR... * FREEPORT TEXAS TO THE MOUTH OF THE MISSISSIPPI RIVER A HURRICANE WARNING IS IN EFFECT FOR... * SAN LUIS PASS TEXAS TO INTRACOASTAL CITY LOUISIANA A TROPICAL STORM WARNING IS IN EFFECT FOR... * SARGENT TEXAS TO SAN LUIS PASS * EAST OF INTRACOASTAL CITY LOUISIANA TO THE MOUTH OF THE MISSISSIPPI RIVER A STORM SURGE WATCH IS IN EFFECT FOR... * MOUTH OF THE MISSISSIPPI RIVER TO OCEAN SPRINGS MISSISSIPPI * LAKE PONTCHARTRAIN...LAKE MAUREPAS...AND LAKE BORGNE A HURRICANE WATCH IS IN EFFECT FOR... * EAST OF INTRACOASTAL CITY TO WEST OF MORGAN CITY LOUISIANA 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. PREPARATIONS TO PROTECT LIFE AND PROPERTY SHOULD BE RUSHED TO COMPLETION. 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 WATCH MEANS THAT HURRICANE CONDITIONS ARE POSSIBLE WITHIN THE WATCH AREA. A TROPICAL STORM WARNING MEANS THAT TROPICAL STORM CONDITIONS ARE EXPECTED SOMEWHERE WITHIN THE WARNING AREA. HURRICANE CENTER LOCATED NEAR 26.1N 90.7W AT 26/0900Z POSITION ACCURATE WITHIN 20 NM PRESENT MOVEMENT TOWARD THE NORTHWEST OR 310 DEGREES AT 13 KT ESTIMATED MINIMUM CENTRAL PRESSURE 973 MB MAX SUSTAINED WINDS 95 KT WITH GUSTS TO 115 KT. 64 KT....... 60NE 50SE 20SW 40NW. 50 KT.......100NE 90SE 30SW 60NW. 34 KT.......150NE 140SE 60SW 90NW. 12 FT SEAS..240NE 180SE 120SW 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 26.1N 90.7W AT 26/0900Z AT 26/0600Z CENTER WAS LOCATED NEAR 25.6N 90.2W FORECAST VALID 26/1800Z 27.4N 92.4W MAX WIND 115 KT...GUSTS 140 KT. 64 KT... 60NE 50SE 30SW 40NW. 50 KT... 90NE 80SE 40SW 50NW. 34 KT...150NE 140SE 60SW 90NW. FORECAST VALID 27/0600Z 29.7N 93.5W...NEAR COAST MAX WIND 105 KT...GUSTS 130 KT. 64 KT... 40NE 30SE 20SW 25NW. 50 KT... 60NE 60SE 30SW 40NW. 34 KT...100NE 130SE 60SW 60NW. FORECAST VALID 27/1800Z 32.4N 93.7W...INLAND MAX WIND 50 KT...GUSTS 60 KT. 50 KT... 10NE 10SE 10SW 10NW. 34 KT... 60NE 80SE 20SW 20NW. FORECAST VALID 28/0600Z 34.8N 92.9W...INLAND MAX WIND 30 KT...GUSTS 40 KT. FORECAST VALID 28/1800Z 36.4N 91.0W...INLAND MAX WIND 25 KT...GUSTS 35 KT. FORECAST VALID 29/0600Z 37.3N 87.3W...INLAND MAX WIND 30 KT...GUSTS 40 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 30/0600Z 38.0N 74.5W...POST-TROP/EXTRATROP MAX WIND 35 KT...GUSTS 45 KT. OUTLOOK VALID 31/0600Z 44.0N 60.0W...POST-TROP/EXTRATROP MAX WIND 45 KT...GUSTS 55 KT. REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 26.1N 90.7W INTERMEDIATE PUBLIC ADVISORY...WTNT33 KNHC/MIATCPAT3...AT 26/1200Z NEXT ADVISORY AT 26/1500Z $$ FORECASTER BLAKE
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Summary for Hurricane Laura (AT3/AL132020)
2020-08-26 07:54:18| National Hurricane Center (Atlantic)
...LAURA RAPIDLY INTENSIFYING... ...EXPECTED TO PRODUCE A LIFE-THREATENING STORM SURGE, EXTREME WINDS, AND FLASH FLOODING OVER EASTERN TEXAS AND LOUISIANA LATER TODAY... As of 1:00 AM CDT Wed Aug 26 the center of Laura was located near 25.6, -90.2 with movement WNW at 17 mph. The minimum central pressure was 978 mb with maximum sustained winds of about 105 mph.
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Hurricane Laura Public Advisory Number 25A
2020-08-26 07:54:18| National Hurricane Center (Atlantic)
Issued at 100 AM CDT Wed Aug 26 2020 000 WTNT33 KNHC 260554 TCPAT3 BULLETIN Hurricane Laura Intermediate Advisory Number 25A NWS National Hurricane Center Miami FL AL132020 100 AM CDT Wed Aug 26 2020 ...LAURA RAPIDLY INTENSIFYING... ...EXPECTED TO PRODUCE A LIFE-THREATENING STORM SURGE, EXTREME WINDS, AND FLASH FLOODING OVER EASTERN TEXAS AND LOUISIANA LATER TODAY... SUMMARY OF 100 AM CDT...0600 UTC...INFORMATION ---------------------------------------------- LOCATION...25.6N 90.2W ABOUT 360 MI...580 KM SSE OF LAKE CHARLES LOUISIANA ABOUT 380 MI...610 KM SE OF GALVESTON TEXAS MAXIMUM SUSTAINED WINDS...105 MPH...165 KM/H PRESENT MOVEMENT...WNW OR 300 DEGREES AT 17 MPH...28 KM/H MINIMUM CENTRAL PRESSURE...978 MB...28.88 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: None. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * San Luis Pass Texas to the Mouth of the Mississippi River A Hurricane Warning is in effect for... * San Luis Pass Texas to Intracoastal City Louisiana A Tropical Storm Warning is in effect for... * Sargent Texas to San Luis Pass * East of Intracoastal City Louisiana to the Mouth of the Mississippi River A Storm Surge Watch is in effect for... * Freeport Texas to San Luis Pass * Mouth of the Mississippi River to Ocean Springs Mississippi * Lake Pontchartrain, Lake Maurepas, and Lake Borgne A Hurricane Watch is in effect for... * East of Intracoastal City to west of Morgan City Louisiana 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 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 Watch means that hurricane conditions are possible within the watch area. A watch is typically issued 48 hours before the anticipated first occurrence of tropical-storm-force winds, conditions that make outside preparations difficult or dangerous. A Tropical Storm Warning means that tropical storm conditions are expected somewhere within the warning 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 100 AM CDT (0600 UTC), the center of Hurricane Laura was located near latitude 25.6 North, longitude 90.2 West. Laura is moving toward the west-northwest near 17 mph (28 km/h), and this general motion should continue overnight. A turn toward the northwest is forecast later today, and a northwestward to north-northwestward motion should continue through Wednesday night. On the forecast track, Laura should approach the Upper Texas and southwest Louisiana coasts on Wednesday evening and move inland near those areas Wednesday night or Thursday morning. Data from an Air Force Reserve Unit reconnaissance aircraft indicate that maximum sustained winds have increased to near 105 mph (165 km/h) with higher gusts. Significant strengthening is forecast during the next 24 hours, and Laura is expected to be a major hurricane at landfall. Rapid weakening is expected after Laura makes landfall. Hurricane-force winds extend outward up to 55 miles (90 km) from the center and tropical-storm-force winds extend outward up to 175 miles (280 km). NOAA buoy 42001 in the central Gulf of Mexico recently reported a sustained wind of 60 mph (97 km/h) and a gust to 78 mph (126 km/h). The minimum central pressure estimated from Hurricane Hunter observations is 978 mb (28.88 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Laura can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC. 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... Sea Rim State Park TX to Intracoastal City LA including Sabine Lake and Calcasieu Lake...9-14 ft Intracoastal City to Morgan City including Vermilion Bay...7-11 ft Port Bolivar TX to Sea Rim State Park...6-9 ft Morgan City LA to Mouth of the Mississippi River...4-6 ft San Luis Pass TX to Port Bolivar...3-5 ft Galveston Bay...3-5 ft Freeport TX to San Luis Pass...2-4 ft Mouth of the Mississippi River to Ocean Springs MS including Lake Borgne...2-4 ft Lake Pontchartrain and Lake Maurepas...2-4 ft The deepest water will occur along the immediate coast near and to the right of the landfall location, where the surge will be accompanied by large and destructive waves. This storm surge could penetrate up to 30 miles inland from the immediate coastline in southwestern Louisiana and far southeastern Texas. 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. RAINFALL: From this afternoon through Friday, Laura is expected to produce rainfall totals of 5 to 10 inches, with isolated maximum amounts of 15 inches across portions of the northwestern Gulf Coast from western Louisiana to far eastern Texas, and northward into much of Arkansas. Over the lower to middle Mississippi Valley from central Louisiana into western Tennessee and Kentucky, and southeastern Missouri, 2 to 4 inches of rainfall with isolated totals of 6 inches are expected. This rainfall will cause widespread flash and urban flooding, small streams to overflow their banks, and minor to isolated moderate river flooding. By late Friday into Saturday, portions of the Tennessee and Ohio Valley could see 2 to 4 inches with locally higher amounts as tropical moisture from Laura moves through the region. This rainfall could lead to localized flash and urban flooding along small streams. WIND: Hurricane conditions are expected in the hurricane warning area Wednesday night and Thursday. Tropical storm conditions are expected to reach the coast in the hurricane warning area late today or Wednesday night, and are expected in the tropical storm warning area Wednesday night and Thursday. Hurricane-force winds and damaging wind gusts are also expected to spread well inland into portions of eastern Texas and western Louisiana early Thursday. TORNADOES: A few tornadoes are possible starting Wednesday evening over Louisiana, far southeast Texas, and southwestern Mississippi. The risk for a few tornadoes should continue into Thursday across Louisiana, Arkansas, and western Mississippi. SURF: Swells produced by Laura are affecting the U.S. Gulf coast from the west coast of Florida to Louisiana and are expected to reach the coast of Texas and northeastern Mexico 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 400 AM CDT. $$ Forecaster Blake
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Hurricane Laura Potential Storm Surge Flooding Map
2020-08-26 05:29:50| National Hurricane Center (Atlantic)
Potential Storm Surge Flooding Map last updated Wed, 26 Aug 2020 03:29:50 GMT
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Hurricane Laura Probabilistic Storm Surge Graphics
2020-08-26 05:10:13| National Hurricane Center (Atlantic)
Probabilistic Storm Surge Graphics last updated Wed, 26 Aug 2020 03:10:13 GMT
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