Probability of a tornado within 25 miles of a point. Hatched Area: 10% or greater probability of EF2 - EF5 tornadoes within 25 miles of a point.
Day 1 Tornado Risk
Area (sq. mi.)
Area Pop.
Some Larger Population Centers in Risk Area
No Risk Areas Forecast
Probabilistic Damaging Wind Graphic
Probability of damaging thunderstorm winds or wind gusts of 50 knots or higher within 25 miles of a point. Hatched Area: 10% of greater probability of wind gusts 65 knots or greater within 25 miles of a point.
Day 1 Wind Risk
Area (sq. mi.)
Area Pop.
Some Larger Population Centers in Risk Area
No Risk Areas Forecast
Probabilistic Large Hail Graphic
Probability of hail 1" or larger within 25 miles of a point. Hatched Area: 10% or greater probability of hail 2" or larger within 25 miles of a point.
Day 1 Hail Risk
Area (sq. mi.)
Area Pop.
Some Larger Population Centers in Risk Area
No Risk Areas Forecast
SPC AC 170042
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0642 PM CST Wed Dec 16 2020
Valid 170100Z - 171200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Thunderstorms will be possible this evening into tonight across
parts of the eastern Seaboard, Florida and along the West Coast. No
severe storms are expected.
...DISCUSSION...
The latest water vapor imagery shows a shortwave trough in the
southern Appalachians. Thunderstorms will be possible along parts of
the Eastern Seaboard as the shortwave trough approaches the East
Coast this evening. This feature will move offshore tonight ending
the potential for storms along the East Coast. Further to the south,
a few thunderstorms will also be possible across the central Florida
Peninsula where instability is relatively weak. Lightning strikes
will also be possible tonight along parts of the West Coast as a
shortwave trough approaches the coast. No severe thunderstorm
development is expected this evening or tonight across the
continental United States.
..Broyles.. 12/17/2020
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 0600Z
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