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    Day 2 Outlook >
Feb 18, 2018 0100 UTC Day 1 Convective Outlook
Updated: Sun Feb 18 00:42:45 UTC 2018 (Print Version | 20180218 0100Z Day 1 shapefile | 20180218 0100Z Day 1 KML)
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 Forecast Discussion
   SPC AC 180042

   Day 1 Convective Outlook  
   NWS Storm Prediction Center Norman OK
   0642 PM CST Sat Feb 17 2018

   Valid 180100Z - 181200Z

   ...NO SEVERE THUNDERSTORM AREAS FORECAST...

   ...SUMMARY...
   A few lightning strikes remain possible tonight mainly over the
   Pacific Northwest coastal areas.

   ...Pacific Northwest coast...

   Steepening lapse rates with cold mid-level temperatures accompanying
   an upper low circulation moving south southeastward through the
   Pacific Northwest will result in weak instability (MLCAPE at or
   below 300 J/kg) within post-frontal regime along coastal WA and OR.
   This environment may become at least marginally sufficient for
   scattered low-topped convection to produce a few lightning strikes
   overnight. 

   ...Southwest TX...

   A weak warm-advection regime will evolve across southwest TX
   resulting in weak destabilization. A few elevated showers and
   possibly a lightning strike or two may occur in this environment
   late tonight. However, coverage of any thunderstorms is expected to
   remain less than 10%.

   ..Dial.. 02/18/2018

   CLICK TO GET WUUS01 PTSDY1 PRODUCT

   NOTE: THE NEXT DAY 1 OUTLOOK IS SCHEDULED BY 0600Z

        
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Page last modified: February 18, 2018
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