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Tropical Storm Sally Public Advisory Number 23A
2020-09-17 01:51:36| National Hurricane Center (Atlantic)
Issued at 700 PM CDT Wed Sep 16 2020 000 WTNT34 KNHC 162351 TCPAT4 BULLETIN Tropical Storm Sally Intermediate Advisory Number 23A NWS National Hurricane Center Miami FL AL192020 700 PM CDT Wed Sep 16 2020 ...HEAVY RAINS FROM SALLY CONTINUE TO SPREAD NORTHWARD OVER EASTERN ALABAMA AND WESTERN GEORGIA... ...CATASTROPHIC AND LIFE-THREATENING FLOODING CONTINUES OVER PORTIONS OF THE FLORIDA PANHANDLE AND SOUTHERN ALABAMA... SUMMARY OF 700 PM CDT...0000 UTC...INFORMATION ---------------------------------------------- LOCATION...31.5N 86.5W ABOUT 70 MI...110 KM WNW OF DOTHAN ALABAMA MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H PRESENT MOVEMENT...NE OR 35 DEGREES AT 7 MPH...11 KM/H MINIMUM CENTRAL PRESSURE...994 MB...29.35 INCHES WATCHES AND WARNINGS -------------------- CHANGES WITH THIS ADVISORY: The Storm Surge Warning from the Alabama/Florida border to the Walton/Bay County Florida line is discontinued. The Tropical Storm Warning west of the Okaloosa/Walton County Florida line is discontinued. SUMMARY OF WATCHES AND WARNINGS IN EFFECT: A Tropical Storm Warning is in effect for... * Okaloosa/Walton County Florida line eastward to Indian Pass Florida A Tropical Storm Warning means that tropical storm conditions are occurring 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 700 PM CDT (0000 UTC), the center of Tropical Storm Sally was located near latitude 31.5 North, longitude 86.5 West. Sally is moving toward the northeast near 7 mph (11 km/h), and a northeastward motion at a slightly faster forward speed is expected tonight through Thursday night. On the forecast track, the center of Sally will move across southeastern Alabama tonight, over central Georgia on Thursday, and move over South Carolina Thursday night. Maximum sustained winds have decreased to near 45 mph (75 km/h) with higher gusts. Additional weakening is expected as the center moves farther inland tonight, and Sally is forecast to become a tropical depression tonight. Tropical-storm-force winds extend outward up to 125 miles (205 km) from the center. The estimated minimum central pressure is 994 mb (29.35 inches). HAZARDS AFFECTING LAND ---------------------- Key messages for Sally can be found in the Tropical Cyclone Discussion under AWIPS header MIATCDAT4 and WMO header WTNT44 KNHC, and on the web at www.hurricanes.gov/text/MIATCDAT4.shtml RAINFALL: Sally has produced storm totals of 10 to 20 inches, with isolated amounts of 30-35 inches, across the central Gulf Coast from the Florida Panhandle west of Tallahassee to Mobile Bay, Alabama. Historic and catastrophic flooding, including widespread moderate to major river flooding, will continue across this region. Additional rainfall of 1 to 4 inches is possible across the Florida Panhandle from Tallahassee to the Apalachicola River. Rainfall totals expected as Sally tracks across the Southeast through Friday: Southern Alabama and central Georgia: 4 to 8 inches with isolated amounts of 12 inches, resulting in significant flash flooding and widespread minor to moderate and isolated major river flooding. Central to upstate South Carolina: 4 to 7 inches, with isolated amounts of 10 inches. Widespread flash flooding and minor to moderate river flooding is possible. Western to central North Carolina and far southeast Virginia: 4 to 6 inches, isolated amounts up to 8 inches. Scattered flash flooding and widespread minor river flooding is possible. STORM SURGE: Water levels remain elevated along the Florida Panhandle coast but will continue to recede over the next several hours. WIND: Tropical storm conditions will continue in portions of the warning area this evening. TORNADOES: A few tornadoes may occur tonight across portions of northern Florida and southern Georgia. The threat of tornadoes will shift northeastward into parts of eastern Georgia and much of the Carolinas on Thursday. SURF: Swells from Sally will continue to affect the Gulf Coast from the Florida Big Bend westward to southeastern Louisiana during the next day or so. 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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