Mar 30, 2021 0600 UTC Day 2 Convective Outlook
Updated: Tue Mar 30 06:00:39 UTC 2021 (20210330 0600Z Day 2 shapefile | 20210330 0600Z Day 2 KML)
Probabilistic to Categorical Outlook Conversion Table
Categorical Graphic
20210330 0600 UTC Day 2 Outlook Graphic
Day 2 Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
MARGINAL 289,652 38,671,678 Charlotte, NC...New Orleans, LA...Virginia Beach, VA...Atlanta, GA...Raleigh, NC...
Probabilistic Tornado Graphic
20210330 0600 UTC Day 2 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 2 Tornado Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
2 % 122,149 24,414,528 Charlotte, NC...Virginia Beach, VA...Atlanta, GA...Raleigh, NC...Norfolk, VA...
Probabilistic Damaging Wind Graphic
20210330 0600 UTC Day 2 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 2 Wind Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
5 % 289,614 38,651,307 Charlotte, NC...New Orleans, LA...Virginia Beach, VA...Atlanta, GA...Raleigh, NC...
Probabilistic Large Hail Graphic
20210330 0600 UTC Day 2 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 2 Hail Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
5 % 198,118 25,976,796 Charlotte, NC...New Orleans, LA...Atlanta, GA...Birmingham, AL...Baton Rouge, LA...
   SPC AC 300600

   Day 2 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   0100 AM CDT Tue Mar 30 2021

   Valid 311200Z - 011200Z

   ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS INCLUDING THE
   LOWER MISSISSIPPI VALLEY ACROSS MUCH OF THE SOUTHEAST AND NORTHWARD
   INTO PARTS OF THE MID-ATLANTIC STATES...

   ...SUMMARY...
   Isolated severe thunderstorms are possible on Wednesday from the
   lower Mississippi Valley northeastward to the southern Appalachians.
   The severe risk will probably continue after dark from the Carolinas
   northward to the Delmarva peninsula.

   ...Lower MS Valley east to GA and northward through the Carolinas
   and eastern VA/Delmarva...
   A large-scale mid-level trough initially over the central U.S. will
   amplify as it moves east and reaches the lower Great Lakes southward
   to the Southeast.  A cold front will extend from the upper OH Valley
   southwestward into east TX Wednesday morning.  A still modifying
   airmass over the central Gulf Coast states will feature surface
   dewpoints in the upper 60s near the coast to the lower 60s farther
   north over the TN Valley.  Weak to moderate buoyancy is forecast to
   develop during the day ahead of the southeast-moving front with
   SBCAPE ranging from 250 J/kg to 1000+ J/kg in the richer moisture. 
   Strong deep-layer flow will overspread the warm sector with a
   conditional threat for strong to severe storms.  The primary
   limiting factors for a more robust risk appear to be a tendency for
   storms to be undercut by the front and the displacement of stronger
   mid- to upper-level forcing for ascent to the north.  Isolated
   damaging gusts and large hail will be the primary threats.

   Farther northeast, a surface low is forecast to develop in lee of
   the higher terrain over VA during the day.  Southerly low-level flow
   will aid in lower to mid 60s F dewpoints into NC and VA.  Diurnal
   heating will contribute to storms redeveloping over north GA/western
   Carolinas during the late afternoon/evening.  A belt of 35-40 kt 850
   mb flow will strengthen during the evening as mid-level flow
   increases after dark.  Although instability will be limited on the
   northern periphery of the marginally unstable warm sector, a
   convective band will likely develop during the evening across parts
   of the Carolinas into VA.  Isolated damaging gusts and perhaps a
   tornado may accompany the stronger storms.

   ..Smith.. 03/30/2021

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   NOTE: THE NEXT DAY 2 OUTLOOK IS SCHEDULED BY 1730Z