Oct 29, 2021 2000 UTC Day 1 Convective Outlook
Updated: Fri Oct 29 19:54:30 UTC 2021 (20211029 2000Z Day 1 shapefile | 20211029 2000Z Day 1 KML)
Probabilistic to Categorical Outlook Conversion Table
Categorical Graphic
20211029 2000 UTC Day 1 Outlook Graphic
Day 1 Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
MARGINAL 11,491 2,567,920 Virginia Beach, VA...Norfolk, VA...Chesapeake, VA...Newport News, VA...Hampton, VA...
Probabilistic Tornado Graphic
20211029 2000 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
2 % 10,158 2,124,049 Virginia Beach, VA...Norfolk, VA...Chesapeake, VA...Newport News, VA...Hampton, VA...
Probabilistic Damaging Wind Graphic
20211029 2000 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
5 % 11,444 2,549,892 Virginia Beach, VA...Norfolk, VA...Chesapeake, VA...Newport News, VA...Hampton, VA...
Probabilistic Large Hail Graphic
20211029 2000 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 291954

   Day 1 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   0254 PM CDT Fri Oct 29 2021

   Valid 292000Z - 301200Z

   ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
   EASTERN VIRGINIA AND THE DELMARVA PENINSULA...

   ...SUMMARY...
   Isolated strong to severe storms remain possible this afternoon over
   parts of eastern Virginia into the Delmarva region. Marginally
   severe wind gusts should be the primary threat.

   ...20Z Update...
   Primary change with this update was to remove severe probabilities
   behind a broken line of low-topped convection over eastern VA.
   Isolated strong/gusty winds and perhaps a brief tornado will remain
   possible this afternoon along/south of a front draped across the
   Mid-Atlantic. For more information on the near term severe threat
   across this region, see Mesoscale Discussion 1928.

   ..Gleason.. 10/29/2021

   .PREV DISCUSSION... /ISSUED 1117 AM CDT Fri Oct 29 2021/

   ...NC into Delmarva...
   A large upper low is present today over the TN/OH Valleys, with an
   intense mid-level jet nosing across the Carolinas into southeast VA.
    Meanwhile at the surface, a warm front is lifting northward across
   the Delmarva region.  A narrow axis of relatively moist and
   marginally unstable air immediately south of the warm front will
   pose a low risk of surface-based rotating storms this afternoon. 
   Locally gusty winds or a brief tornado appear to be the main
   threats.  Please refer to MCD #1927 for further mesoscale details.

   ...Other...
   After 32 years of federal service, and 23 years of tenure as a
   meteorologist at the Storm Prediction Center, Greg Dial is retiring
   today.  He has issued thousands of life-saving forecasts, outlooks,
   and watches during that time.  We thank Greg for his skills and
   friendship, and wish him all the best.

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   NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 0100Z