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 301225
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0625 AM CST TUE DEC 30 2014
VALID 301300Z - 311200Z
...NO TSTM AREAS FORECAST...
...SUMMARY...
THUNDERSTORMS ARE UNLIKELY ACROSS THE CONTINENTAL UNITED STATES FOR
TODAY AND TONIGHT.
...SYNOPSIS AND FORECAST...
A POSITIVELY TILTED UPPER TROUGH FROM HUDSON BAY TO THE GREAT BASIN
WILL FRACTURE WITH THE SRN PORTION EVOLVING INTO A CLOSED LOW OVER
THE SIERRA NEVADA INTO LOWER CO VALLEY. MEANWHILE...THE
HIGHER-LATITUDE SEGMENT OF THE TROUGH WILL ADVANCE SEWD THROUGH
ONTARIO/QUEBEC AND THE GREAT LAKES...AHEAD OF AN UPSTREAM JET STREAK
DIGGING SSEWD THROUGH THE CANADIAN PRAIRIE PROVINCES. ELSEWHERE...A
BELT OF STRONG WSWLY FLOW WILL PREVAIL FROM THE SRN ROCKIES TO OFF
THE MID ATLANTIC COAST.
AT THE SURFACE...A WEAK COLD FRONT WILL CONTINUE SWD THROUGH THE FL
PENINSULA WHILE AN EXPANSIVE AND STRONG ANTICYCLONE BUILDS SWD ALONG
THE LEE OF THE ROCKIES.
WHILE THE AIR MASS REMAINS RELATIVELY MOIST ACROSS FL...WEAK LAPSE
RATES WILL LIMIT UPDRAFT DEPTH AND LIGHTNING POTENTIAL WITH ANY
CONVECTIVE ELEMENTS FORMING ALONG AND AHEAD OF THE FRONT.
ELSEWHERE...A DRY...STABLE AIR MASS WILL PRECLUDE TSTM DEVELOPMENT.
..MEAD.. 12/30/2014
CLICK TO GET WUUS01 PTSDY1 PRODUCT
NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 1630Z
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