512
ACUS01 KWNS 201937
SWODY1
SPC AC 201935
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0135 PM CST SAT DEC 20 2025
VALID 202000Z - 211200Z
..NO SEVERE THUNDERSTORM AREAS FORECAST
..SUMMARY
A FEW LIGHTNING FLASHES MAY OCCUR TODAY ACROSS PARTS OF COASTAL
WASHINGTON/OREGON AND TONIGHT OVER SOUTHERN LOUISIANA. SEVERE
THUNDERSTORMS ARE NOT EXPECTED.
..20Z UPDATE
NO CHANGES HAVE BEEN MADE TO THE ONGOING FORECAST. SEE THE PREVIOUS
DISCUSSION BELOW FOR MORE INFORMATION.
..GLEASON.. 12/20/2025
PREV DISCUSSION
/ISSUED 0953 AM CST SAT DEC 20 2025/
DRY AND STABLE CONDITIONS WILL PREVAIL OVER MOST OF THE CONUS TODAY,
PRECLUDING THUNDERSTORMS. ONE EXCEPTION WILL BE OVER WESTERN WA
WEST OF THE CASCADES, WHERE FAST ONSHORE FLOW, OROGRAPHIC LIFT, AND
100-200 J/KG OF CAPE WILL BE PRESENT. THE OTHER AREA OF SOME RISK
OF LIGHTNING WILL BE OVER SOUTHERN LA TONIGHT IN A WEAK LOW-LEVEL
WARM ADVECTION REGIME. IN BOTH AREAS, THUNDERSTORM COVERAGE IS
ANTICIPATED TO BE SPARSE AND SEVERE RISK NEGLIGIBLE.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
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