SPC 1630Z Day 1 Outlook

Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
1002 AM CST Sat Dec 26 2020

Valid 261630Z - 271200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Thunderstorm potential will be negligible across much of the
contiguous U.S. through early Sunday, except along coastal
Washington this evening.

...Coastal WA...
The next in a series of low-amplitude shortwave impulses, currently
well west of OR, should approach coastal WA this evening. A zone of
focused ascent attendant to this impulse in conjunction with steep
low to mid-level lapse rates should yield a period of scattered
low-topped convection approaching the coast. Scant buoyancy (SBCAPE
below 250 J/kg) may support very isolated lightning flashes and this
threat appears marginally sufficient for a 10-percent thunder area.

..Grams.. 12/26/2020

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