Current SPC Activity Chart

Current Severe US Wx Maps

SPC Activity Chart
Hazard Thu (11/23) Fri (11/24) Sat (11/25) Sun (11/26) Mon (11/27) Tue (11/28) Wed (11/29) Thu (11/30)
Severe Marginal No Severe No Thunder No Area No Area No Area No Area No Area
Fire No Critical Elevated No Area No Area No Area No Area No Area No Area

Forecast Discussion - Convective Outlook

   SPC AC 231604

   Day 1 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   1004 AM CST Thu Nov 23 2017

   Valid 231630Z - 241200Z

   ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS OVER PARTS OF
   THE CENTRAL AND SOUTHERN FLORIDA PENINSULA...

   ...SUMMARY...
   A few strong to severe thunderstorms are possible across the central
   and southern Florida Peninsula today.

   ...FL...
   Showers and thunderstorms continue to affect the FL peninsula today,
   as an upper trough moves across the region.  The strongest upper
   forcing and vertical shear is occurring in vicinity of the surface
   baroclinic zone from north of TPA to north of MLB.  Isolated cells
   may occasionally intensify to strong/severe levels in this corridor
   today with gusty winds, small hail, and perhaps a tornado.  Vertical
   shear profiles will slowly weaken through the day as cyclogenesis
   occurs off the east coast, veering and weakening low level winds. 
   This combined with substantial cloud cover and only weak CAPE lead
   to maintenance of the MRGL risk category.

   Farther south, parameters are less favorable for organized severe
   storms.  However, slightly higher instability values and more
   favorable diurnal timing of convection may lead to a few strong
   cells capable of gusty winds. Therefore no changes to the outlook
   have been made to this area.

   ..Hart/Leitman.. 11/23/2017

    

   NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 2000Z