747
ACUS02 KWNS 201700
SWODY2
SPC AC 201659
DAY 2 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1159 AM CDT THU MAR 20 2025
VALID 211200Z - 221200Z
..NO SEVERE THUNDERSTORM AREAS FORECAST
..SUMMARY
SEVERE THUNDERSTORMS ARE NOT EXPECTED FRIDAY.
..MID-MO/MS VALLEYS
A COMPACT SHORTWAVE IMPULSE CURRENTLY OVER THE NORTHERN ROCKIES WILL
PROGRESS ACROSS PARTS OF THE MID-MO/MS VALLEYS FRIDAY. DESPITE A
DEARTH OF LOW-LEVEL MOISTURE, DIURNALLY STEEPENING LAPSE RATES ALONG
WITH A FOCUSED CORRIDOR OF MODERATE LARGE-SCALE ASCENT SHOULD
SUPPORT A SWATH OF ISOLATED TO SCATTERED LOW-TOPPED CONVECTION,
PRIMARILY FROM LATE MORNING TO EARLY EVENING. MEAGER BUOYANCY SHOULD
BE ADEQUATE FOR SPORADIC LIGHTNING. GUSTY, SUB-SEVERE WINDS MAY
ACCOMPANY THIS ACTIVITY, ESPECIALLY ACROSS THE SOUTHERN PORTION OF
THE CONVECTIVE THREAT, OWING TO A DEEPER MIXED BOUNDARY LAYER AND
30-40 KT 850-MB WESTERLIES.
..NORTHWEST
THE NEXT SHORTWAVE TROUGH WILL MOVE INLAND OF THE PACIFIC NORTHWEST
COAST AND REACH THE NORTHERN ROCKIES BY FRIDAY NIGHT. SCATTERED
LOW-TOPPED CONVECTION SHOULD ACCOMPANY THIS WAVE WITHIN A CONFINED
BELT OF STRONGER FORCING FOR ASCENT COINCIDENT WITH SCANT BUOYANCY
AT MOST. ISOLATED THUNDERSTORMS ARE POSSIBLE NEAR THE CASCADES ON
FRIDAY AFTERNOON, SHIFTING EAST ACROSS THE COLUMBIA BASIN AND INTO
THE NORTHERN ROCKIES THROUGH LATE EVENING.
..GRAMS.. 03/20/2025
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