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Tropical Storm Sally Discussion Number 23
NWS National Hurricane Center Miami FL AL192020
400 PM CDT Wed Sep 16 2020
The center of Sally continued its slow trek inland across the
far western Florida Panhandle early this afternoon, and it is
now located over southeastern Alabama. The satellite and radar
presentation of the storm has continued to degrade, and surface
observations and Doppler radar data show that winds have continued
to gradually decrease. The initial intensity has been reduced to
50 kt, and rapidly weakening should continue as the circulation
moves farther inland. Sally is forecast to become a tropical
depression tonight or early Thursday, and degenerate into a remnant
low in 36-48 hours. The system is expected to be absorbed by a
frontal boundary near the southeast U.S. coast on Friday.
Sally is moving north-northeastward at a slightly faster forward
speed of 6 kt. The cyclone should turn northeastward and move at a
slightly faster forward speed as it become embedded within the
southern extent of the mid-latitude westerlies, and this general
motion should continue until dissipation occurs. The dynamical
models are tightly clustered and the NHC track is near the center
of envelope.
Although the winds and storm surge from Sally are expected to
continue to subside this evening, heavy rainfall and flooding will
continue to spread inland over southeastern Alabama, central
Georgia, and western South Carolina over the next day or so.
KEY MESSAGES:
1. Historic and catastrophic flooding, including widespread moderate
to major river flooding, is unfolding along and just inland from
west of Tallahassee, Florida to Mobile Bay, Alabama. Significant and
widespread flooding is expected across inland portions of Alabama,
central Georgia and upstate South Carolina, and widespread flooding
is possible across western/central North Carolina, and far southeast
Virginia.
2. Life-threatening storm surge is occurring along portions of the
coastline of the western Florida Panhandle, including Pensacola Bay.
3. Tropical storm conditions are expected to continue this evening
within portions of the Tropical Storm warning area in southern
Alabama, and the western Florida panhandle.
FORECAST POSITIONS AND MAX WINDS
INIT 16/2100Z 31.2N 86.8W 50 KT 60 MPH
12H 17/0600Z 31.9N 86.0W 30 KT 35 MPH...INLAND
24H 17/1800Z 33.2N 84.0W 25 KT 30 MPH...INLAND
36H 18/0600Z 34.2N 81.4W 25 KT 30 MPH...POST-TROP/REMNT LOW
48H 18/1800Z...DISSIPATED
$$
Forecaster Brown
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