128
ACUS01 KWNS 210516
SWODY1
SPC AC 210514
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1114 PM CST SAT DEC 20 2025
VALID 211200Z - 221200Z
..NO SEVERE THUNDERSTORM AREAS FORECAST
..SUMMARY
SEVERE THUNDERSTORMS ARE NOT EXPECTED TODAY.
..PACIFIC NORTHWEST
LOW-AMPLITUDE SHORT-WAVE TROUGH IS FORECAST TO APPROACH THE PACIFIC
NORTHWEST COAST LATER THIS EVENING AS MODEST MIDLEVEL HEIGHT FALLS
SPREAD INLAND ACROSS WA/OR. LATEST MODEL GUIDANCE SUGGESTS WEAK
BUOYANCY WILL PERSIST MUCH OF THE PERIOD, PARTICULARLY NEAR THE
COAST, WHERE ONSHORE FLOW WILL CONTRIBUTE TO SBCAPE GENERALLY LESS
THAN 100 J/KG. AS FREEZING LEVELS LOWER, SHALLOW CONVECTION MAY
PENETRATE LEVELS NECESSARY FOR LIGHTNING DISCHARGE. FOR THESE
REASONS WILL MAINTAIN 10% PROBABILITY FOR ISOLATED THUNDERSTORMS,
PRIMARILY NEAR THE COAST.
..DARROW/SQUITIERI.. 12/21/2025
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