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| #1020696 (Received by flhurricane at: 2:06 AM 10.Oct.2020) TCPAT1 BULLETIN Tropical Storm Delta Intermediate Advisory Number 22A NWS National Hurricane Center Miami FL AL262020 100 AM CDT Sat Oct 10 2020 ...DELTA NOW A TROPICAL STORM... ...TROPICAL STORM CONDITIONS AND HEAVY RAINS OCCURRING OVER MUCH OF LOUISIANA... SUMMARY OF 100 AM CDT...0600 UTC...INFORMATION ---------------------------------------------- LOCATION...31.2N 92.3W ABOUT 15 MI...25 KM ESE OF ALEXANDRIA LOUISIANA MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H PRESENT MOVEMENT...NNE OR 25 DEGREES AT 15 MPH...24 KM/H MINIMUM CENTRAL PRESSURE...985 MB...29.09 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Hurricane Warning from High Island Texas to Morgan City Louisiana has been replaced with a Tropical Storm Warning. The Storm Surge Warning has been discontinued from Port Fourchon to Mouth of the Pearl River, Louisiana including Lake Borgne. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Storm Surge Warning is in effect for... * Cameron to Port Fourchon, Louisiana including Vermilion Bay. A Tropical Storm Warning is in effect for... * High Island Texas to the mouth of the Pearl River, including New Orleans * Lake Pontchartrain and Lake Maurepas 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 Tropical Storm Delta was located near latitude 31.2 North, longitude 92.3 West. Delta is moving toward the north-northeast near 15 mph (24 km/h), and this motion is expected to continue through the morning. A motion toward the northeast is expected this afternoon through Sunday night. On the forecast track, the center of Delta should move across central and northeastern Louisiana this morning and across northern Mississippi and into the Tennessee Valley later today and Sunday. Maximum sustained winds have decreased near 60 mph (95 km/h) with higher gusts. Continued weakening is forecast, and Delta should become a tropical depression later today. Tropical-storm-force winds extend outward up to 160 miles (260 km). A wind gust of 68 mph (110 km/h) was recently reported at LSU Tiger Stadium in Baton Rouge, Louisiana. Wind gusts of 55 mph (89 km/h) were recently reported at Adams County airport in Natchez, Mississippi and in Lacassine, Louisiana, and a gust to 59 mph (95 km/h) was just reported in Monroe, Louisiana. The estimated minimum central pressure based on surface observations is 985 mb (29.09 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...4-6 ft Cameron, LA to Rockefeller Wildlife Refuge, LA...2-4 ft Morgan City, LA to Port Fourchon, LA...2-4 ft Port Fourchon, LA to the AL/FL border including Lake Borgne, Lake Pontchartrain, Lake Maurepas and Mobile Bay...1-3 ft Port O`Connor, TX to Cameron, LA including Galveston Bay, Sabine Lake, and Calcasieu Lake...1-3 ft 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: Tropical storm conditions will continue within portions of the tropical storm warning area through the morning. RAINFALL: Through Saturday, Delta is expected to produce 5 to 10 inches of rain, with isolated maximum totals of 15 inches, from southwest into central Louisiana. These rainfall amounts will lead to significant flash, urban, small stream flooding, along with minor to major river flooding. For extreme eastern 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 the remnants of Delta move farther inland, 1 to 3 inches of rain, with locally higher amounts, are expected in the Tennessee Valley and Mid Atlantic this weekend. There is a potential for 3 to 6 inches in the Southern Appalachians, which could lead to isolated flash, urban, and small stream flooding. TORNADOES: A few tornadoes are possible early this morning over southern portions of Louisiana and Mississippi, and over Alabama, central and eastern Mississippi, southern Tennessee and the western Florida Panhandle on Saturday. SURF: Swells from Delta are still 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 complete advisory at 400 AM CDT. $$ Forecaster Cangialosi/Zelinsky |
