Dec 27, 2017 0600 UTC Day 1 Convective Outlook
Updated: Wed Dec 27 05:00:53 UTC 2017 (20171227 1200Z Day 1 shapefile | 20171227 1200Z Day 1 KML)
Probabilistic to Categorical Outlook Conversion Table
Categorical Graphic
20171227 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
20171227 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
20171227 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
20171227 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 270500

   Day 1 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   1100 PM CST Tue Dec 26 2017

   Valid 271200Z - 281200Z

   ...NO THUNDERSTORM AREAS FORECAST...

   ...SUMMARY...
   No organized thunderstorms are forecast today.

   ...Synopsis...
   High surface pressure currently centered over the central Plains is
   expected to slide eastward through the middle MS valley and into the
   upper Great Lakes throughout the period, maintaining its influence
   over the majority of the central and eastern CONUS. Cold and dry
   airmass associated with this high pressure will preclude
   thunderstorms across the land areas. Isolated strikes are possible
   near the frontal low moving eastward over the central Gulf of Mexico
   and another surface low developing off the Carolina coast. West of
   the Rockies, cool, dry, and stable conditions will temper any
   thunderstorm chances.

   ..Mosier/Elliott.. 12/27/2017

   CLICK TO GET WUUS01 PTSDY1 PRODUCT

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