642
ACUS03 KWNS 301900
SWODY3
SPC AC 301900
DAY 3 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0200 PM CDT TUE SEP 30 2025
VALID 021200Z - 031200Z
..NO SEVERE THUNDERSTORM AREAS FORECAST
..SUMMARY
THE RISK FOR SEVERE THUNDERSTORMS APPEARS NEGLIGIBLE ON THURSDAY.
..SYNOPSIS
AN UPPER TROUGH WILL GRADUALLY AMPLIFY ALONG THE WEST COAST ON
THURSDAY, WITH INCREASING SOUTHWEST WINDS ALOFT ACROSS THE GREAT
BASIN AND INTO THE NORTHERN ROCKIES. AHEAD OF THIS TROUGH, AN UPPER
RIDGE WILL EXIST FROM MEXICO INTO THE SOUTHERN PLAINS, WITH A
SECONDARY HIGH FROM THE TN VALLEY ACROSS THE APPALACHIANS.
AT THE SURFACE, HIGH PRESSURE WILL DOMINATE THE PATTERN ACROSS THE
EASTERN STATES, THE GULF OF AMERICA AND INTO THE PLAINS, WITH
MINIMAL INSTABILITY FORECAST. EXCEPTIONS WILL BE OVER THE FL
PENINSULA IN A MOIST EASTERLY LOW-LEVEL FLOW REGIME, AND OVER PARTS
OF ND AND NORTHERN MN WHERE SOUTHERLY FLOW AND MOISTENING MAY ALLOW
FOR ELEVATED INSTABILITY TO DEVELOP. IN EITHER CASE, SEVERE STORMS
ARE UNLIKELY.
OTHERWISE, LIFT WITH THE WESTERN TROUGH AND MIDLEVEL MOISTURE SHOULD
RESULT IN PRECIPITATION AND A FEW LIGHTNING FLASHES FROM CENTRAL NV
INTO SOUTHWEST MT.
..JEWELL.. 09/30/2025
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