NWS Storm Prediction Center - Day 2 Convective Outlook

Apr 21, 2021 1730 UTC Day 2 Convective Outlook
Updated: Wed Apr 21 17:27:59 UTC 2021
  |  
SPC Day 2 1730Z Outlook Categorical SPC Day 2 1730Z Outlook Categorical Legend

 Forecast Discussion - Day 2 Convective Outlook


   SPC AC 211727

   Day 2 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   1227 PM CDT Wed Apr 21 2021

   Valid 221200Z - 231200Z

   ...NO SEVERE THUNDERSTORM AREAS FORECAST...

   ...SUMMARY...
   Severe thunderstorms are not expected across the United States on
   Thursday.

   ...Discussion...
   As an upper low over the eastern U.S. shifts eastward/northeastward
   into the western Atlantic/Canadian Maritime provinces, a trough
   consisting of phased northern- and southern-stream components is
   progged to advance across the West/Intermountain Region.

   As the upper system advances, cool air aloft/steepening lapse rates
   will support scattered showers, as well as some embedded lightning
   -- particularly during the diurnal peak heating period.  Lightning
   may occur over portions of the Northwest/Continental Divide area,
   and also across portions of the Four Corners states.

   Overnight, warm advection is expected to increase across the
   central/south-central states, as a low-level jet strengthens ahead
   of the advancing upper trough.  However, dry mid-level air atop
   moistening low levels would generally imply that convective
   development will remain unlikely through the end of the period
   across the area.  Near the very end of the period, convective
   potential may increase in the vicinity of the Arklatex, and so a
   conditional thunder area is being maintained there.  Otherwise,
   storm development is not expected through the end of the period.

   Elsewhere, showers and a thunderstorm or two may occur over south
   Florida and the Keys, mainly from afternoon onward.

   ..Goss.. 04/21/2021

   CLICK TO GET WUUS02 PTSDY2 PRODUCT

   NOTE: THE NEXT DAY 2 OUTLOOK IS SCHEDULED BY 0600Z



Data courtesy the Storm Prediction Center
powered by Cumulus v1.9.3 (1059)
Ambient Weather VWS v14.00
Top Website Map Copyright © 2007 - 2021 Foresthillweather.com Never base important decisions on this or any weather information obtained from the Internet