853
ACUS03 KWNS 180731
SWODY3
SPC AC 180729
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0229 AM CDT SUN OCT 18 2026
VALID 201200Z - 211200Z
..NO SEVERE THUNDERSTORM AREAS FORECAST
..SUMMARY
NO SEVERE THUNDERSTORMS ARE EXPECTED ON TUESDAY.
..SYNOPSIS
AN UPPER TROUGH WILL AMPLIFY WHILE PROGRESSING INTO THE INTERIOR
WEST ON TUESDAY. AS THIS OCCURS, DEEP-LAYER ASCENT AND COOLER
TEMPERATURES ALOFT WILL ENCOURAGE AT LEAST ISOLATED THUNDERSTORM
DEVELOPMENT OVER MULTIPLE LOCALES. PRECEDING THE MAIN UPPER TROUGH,
A 500 MB WIND MAXIMUM ACCOMPANYING MULTIPLE LOW-AMPLITUDE IMPULSES
WILL OVERSPREAD LOW-LEVEL MOISTURE OVER THE DESERT SOUTHWEST, AS
WELL AS PORTIONS OF THE GREAT BASIN, RESULTING IN THUNDERSTORMS BY
TUESDAY AFTERNOON. BY LATER TUESDAY NIGHT INTO WEDNESDAY MORNING,
DEEP-LAYER ASCENT ASSOCIATED WITH THE APPROACH OF THE PRIMARY UPPER
TROUGH WILL OVERSPREAD PARTS OF CA. COOLER TEMPERATURES ALOFT WILL
OVERSPREAD A MARINE BOUNDARY LAYER, ENCOURAGING LIGHTNING FLASHES
ALONG THE CA SHORELINE LATE IN THE PERIOD.
..SQUITIERI.. 10/18/2026
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