Dec 20, 2014 0600 UTC Day 1 Convective Outlook
Updated: Sat Dec 20 04:45:55 UTC 2014 (20141220 1200Z Day 1 shapefile | 20141220 1200Z Day 1 KML)
Probabilistic to Categorical Outlook Conversion Table
Categorical Graphic
20141220 1200 UTC Day 1 Outlook Graphic
Day 1 Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
No Risk Areas Forecast
Probabilistic Tornado Graphic
20141220 1200 UTC Day 1 Tornado Probabilities Graphic
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
20141220 1200 UTC Day 1 Damaging Wind Probabilities 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
20141220 1200 UTC Day 1 Large Hail Probabilities 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 200445

   DAY 1 CONVECTIVE OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   1045 PM CST FRI DEC 19 2014

   VALID 201200Z - 211200Z

   ...NO TSTM AREAS FORECAST...

   ...SUMMARY...
   NO THUNDERSTORMS ARE EXPECTED ACROSS THE CONTIGUOUS UNITED STATES.

   ...SYNOPSIS...
   SFC HIGH PRESSURE ENCOMPASSING MOST OF THE CONUS WILL MAINTAIN A DRY
   AND STABLE AIR MASS...WITH MINIMAL THUNDERSTORM POTENTIAL. A WEAKLY
   MODIFIED GULF AIR MASS WILL LINGER NEAR THE DEEP SOUTH TX COAST. A
   FEW SHOWERS MAY DEVELOP ACROSS THIS AREA LATE IN THE PERIOD AHEAD OF
   A SHORTWAVE UPPER TROUGH CROSSING THE MEXICAN PLATEAU...BUT THERMAL
   PROFILES ARE UNSUPPORTIVE FOR LIGHTNING PRODUCTION.

   ..ROGERS.. 12/20/2014

   NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 1300Z