Sally to make landfall tonight or tomorrow

15 Sep 2020 / Gulf Coast, United States

At 400am CDT (0900 UTC), the center of Hurricane Sally was located near latitude 28.9 North, longitude 88.1 West. Sally is moving toward the west-northwest near 2 mph (4 km/h), and this general motion is expected to continue this morning. A northward turn is expected this afternoon, followed by a slow north-northeastward to northeastward motion tonight and continuing through Wednesday night.

On the forecast track, the center of Sally will move near the coast of southeastern Louisiana later today, and make landfall in the hurricane warning area tonight or Wednesday morning…

…Although little change in strength is forecast until landfall occurs, Sally is still expected to be a dangerous hurricane when it moves onshore along the north-central Gulf coast.

Hurricane-force winds extend outward up to 45 miles (75 km) from the center and tropical-storm-force winds extend outward up to 125 miles (205 km)…

…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…

…Hurricane conditions are expected to begin within the hurricane warning area this late afternoon or tonight. Tropical storm conditions are occurring in portions of the warning area across the western Florida Panhandle and Alabama, and these conditions will gradually spread westward this morning and continue into Wednesday.

Sally is expected to be a slow-moving system as it approaches land producing 10-20 inches of rainfall with isolated amounts of 30 inches along and just inland of the central Gulf Coast from the western Florida Panhandle to far southeastern Mississippi.

Historic flooding is possible with extreme life-threatening flash flooding likely through Wednesday. In addition, this rainfall will lead to widespread moderate to major flooding on area rivers.

Sally is forecast to turn inland early Wednesday and move across the Southeast producing rainfall of 4-8 inches, with isolated maximum amounts of 12 inches, across portions of southeastern Mississippi, southern and central Alabama, northern Georgia, and the western Carolinas. Significant flash and urban flooding is likely, as well as widespread minor to moderate flooding on some rivers.

A tornado or two will be possible this morning in coastal areas of the Florida Panhandle and Alabama. The tornado threat should increase and slowly spread inland the rest of today into Wednesday.

Swells from Sally will continue to affect the coast from the Florida Big Bend westward to southeastern Louisiana during the next couple of days...

(For information about operations in the United States, contact GAC North America at [email protected])

Source: Extracts from National Hurricane Center, Miami FL, Hurricane Sally Advisory No.16 issued at 400am CDT on 15 September 2020

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