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Summary for Hurricane Delta (AT1/AL262020)

2020-10-08 19:42:22| National Hurricane Center (Atlantic)

...DELTA MOVING NORTHWESTWARD ACROSS THE WESTERN GULF OF MEXICO... ...HURRICANE CONDITIONS AND LIFE-THREATENING STORM SURGE EXPECTED TO BEGIN ALONG PORTIONS OF THE NORTHERN GULF COAST ON FRIDAY... As of 1:00 PM CDT Thu Oct 8 the center of Delta was located near 24.4, -93.1 with movement NW at 13 mph. The minimum central pressure was 966 mb with maximum sustained winds of about 105 mph.

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Hurricane Delta Public Advisory Number 16A

2020-10-08 19:42:22| National Hurricane Center (Atlantic)

Issued at 100 PM CDT Thu Oct 08 2020 000 WTNT31 KNHC 081742 TCPAT1 BULLETIN Hurricane Delta Intermediate Advisory Number 16A NWS National Hurricane Center Miami FL AL262020 100 PM CDT Thu Oct 08 2020 ...DELTA MOVING NORTHWESTWARD ACROSS THE WESTERN GULF OF MEXICO... ...HURRICANE CONDITIONS AND LIFE-THREATENING STORM SURGE EXPECTED TO BEGIN ALONG PORTIONS OF THE NORTHERN GULF COAST ON FRIDAY... SUMMARY OF 100 PM CDT...1800 UTC...INFORMATION ---------------------------------------------- LOCATION...24.4N 93.1W ABOUT 370 MI...595 KM S OF CAMERON LOUISIANA MAXIMUM SUSTAINED WINDS...105 MPH...165 KM/H PRESENT MOVEMENT...NW OR 310 DEGREES AT 13 MPH...21 KM/H MINIMUM CENTRAL PRESSURE...966 MB...28.53 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 San Luis Pass 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 100 PM CDT (1800 UTC), the center of Hurricane Delta was located near latitude 24.4 North, longitude 93.1 West. Delta is moving toward the northwest near 13 mph (21 km/h), and this motion with a reduction in forward speed is expected this afternoon. A turn toward the north is forecast to occur by late tonight, followed by a north-northeastward motion by Friday afternoon or Friday night. On the forecast track, the center of Delta will move over the western Gulf of Mexico this afternoon, 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 105 mph (165 km/h) with higher gusts. Strengthening is forecast, and Delta is expected to become a major hurricane again by tonight. Some weakening is possible 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 125 miles (205 km). The latest minimum central pressure estimated from Air Force Reserve Hurricane Hunter aircraft data is 966 mb (28.53 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 Port Fourchon, LA including Vermilion Bay...7-11 ft Holly Beach, LA to Rockefeller Wildlife Refuge, LA...4-7 ft Port Fourchon, LA to the Mouth of the Mississippi River...4-6 ft Sabine Pass to Holly Beach, LA...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 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 in 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 isolated moderate 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 Ohio Valley and Mid Atlantic this weekend. TORNADOES: A few tornadoes are possible late tonight through Friday over southern parts of Louisiana and Mississippi SURF: Swells from Delta will begin to affect portions of the northern and western Gulf coast later 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 PM CDT. $$ Forecaster Beven

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