361
ACUS01 KWNS 201220
SWODY1
SPC AC 201218
DAY 1 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0718 AM CDT MON APR 20 2026
VALID 201300Z - 211200Z
..NO SEVERE THUNDERSTORM AREAS FORECAST
..SUMMARY
SEVERE STORMS ARE NOT EXPECTED TODAY.
..SYNOPSIS
WATER-VAPOR IMAGERY THIS MORNING SHOWS A WEAK UPPER TROUGH CENTERED
OVER AZ AND SONORA MOVING EAST UNDERCUTTING A RIDGE OVER THE
ROCKIES. THIS UPPER FEATURE WILL MOVE INTO THE SOUTHERN HIGH PLAINS
BY LATE TONIGHT. FARTHER WEST, A MID- TO UPPER-LEVEL LOW WILL MOVE
SLOWLY EAST FROM THE EASTERN PACIFIC TOWARD THE CA/OR COAST.
SCATTERED SHOWERS AND WEAK ELEVATED STORMS WILL BE POSSIBLE ACROSS A
LARGE PORTION OF TX TODAY. FARTHER WEST, ISOLATED TO SCATTERED
THUNDERSTORMS ARE POSSIBLE IN ASSOCIATION WITH THE WEAK UPPER TROUGH
OVER PARTS OF THE DESERT SOUTHWEST. PRIMARILY DIURNAL STORM
ACTIVITY OVER THE SOUTHERN FL PENINSULA IS EXPECTED, AS WELL AS
ISOLATED LATE DAY THUNDERSTORMS OVER PORTIONS OF THE CASCADES.
ELSEWHERE, SURFACE HIGH PRESSURE WILL LEAD TO TRANQUIL CONDITIONS
ACROSS MUCH OF THE CONUS PRECLUDING STORM DEVELOPMENT.
..SMITH/THOMPSON.. 04/20/2026
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