820  
ACUS01 KWNS 250525  
SWODY1  
SPC AC 250524  
 
DAY 1 CONVECTIVE OUTLOOK  
NWS STORM PREDICTION CENTER NORMAN OK  
1124 PM CST SAT FEB 24 2024  
 
VALID 251200Z - 261200Z  
   
..NO SEVERE THUNDERSTORM AREAS FORECAST
 
 
   
..SUMMARY
 
 
ISOLATED THUNDERSTORMS MAY OCCUR SUNDAY NIGHT ACROSS PARTS OF  
COASTAL/NORTHWEST WASHINGTON.  
   
..PACIFIC NORTHWEST
 
 
STRONG MIDLEVEL HEIGHT FALLS (180M IN 12HR) WILL SPREAD ACROSS THE  
PACIFIC NORTHWEST LATER TODAY IN ADVANCE OF A VERY COLD UPPER  
TROUGH. LATEST MODEL GUIDANCE SUGGESTS 500MB TEMPERATURES WILL  
DECREASE TO LESS THAN -30C NORTH OF THE SAGGING JET. THIS WILL  
ENCOURAGE LAPSE RATES TO STEEPEN SUCH THAT SURFACE-BASED PARCELS  
SHOULD BECOME BUOYANT, PRIMARILY AFTER 06Z. GREATEST INSTABILITY  
WILL BE NEAR THE COAST WHERE MARINE-INFLUENCED BOUNDARY LAYER MAY  
CONTRIBUTE TO SBCAPE ON THE ORDER OF 100-200 J/KG. FORECAST  
SOUNDINGS SUGGEST CHARGE SEPARATION IS POSSIBLE AS CLOUD TOPS COULD  
EXCEED 4KM AGL, LIKELY ADEQUATE FOR LIGHTNING. WILL MAINTAIN THUNDER  
PROBABILITIES ALONG THE WA COAST TO ACCOUNT FOR THIS LATE-NIGHT  
POSSIBILITY.  
 
..DARROW/LYONS.. 02/25/2024  
 

 
 
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