460
ACUS48 KWNS 040902
SWOD48
SPC AC 040900
DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0400 AM CDT TUE AUG 04 2026
VALID 071200Z - 121200Z
..DISCUSSION
AN UPPER HIGH WILL REMAIN OVER THE SOUTHWESTERN STATES THROUGH MUCH
OF THE PERIOD, WITH A DEEP UPPER LOW GRADUALLY SHIFTING EASTWARD
ACROSS ONTARIO CANADA. IN BETWEEN, A ZONE OF MODERATE NORTHWEST FLOW
ALOFT WILL EXIST FROM THE NORTHERN PLAINS/UPPER MS VALLEY ACROSS THE
GREAT LAKES. AT THE SURFACE, LOW PRESSURE WILL EXIST OVER THE
CENTRAL HIGH PLAINS, WITH AN EAST-WEST BOUNDARY ROUGHLY ALONG I-80
FROM NEBRASKA EASTWARD.
STRONGER CYCLONIC FLOW ALOFT WILL MOVE OUT OF THE NORTHERN PLAINS ON
FRI/D4 AND INCREASE ACROSS THE GREAT LAKES AND INTO THE NORTHEAST
FROM SAT/D5 THROUGH THE END OF THE PERIOD, WITH MIDLEVEL WINDS
AROUND 30-40 KT POSSIBLY OVERSPREADING THE SURFACE FRONT. A LARGE
AREA OF UPPER 60S TO LOWER 70S F DEWPOINTS WILL REMAIN ALONG AND
SOUTH OF THE BOUNDARY, WHICH MAY SHIFT NORTH/SOUTH AS DISTURBANCES
ROTATE AROUND THE CANADIAN UPPER LOW. PREDICTABILITY REMAINS LOW FOR
DENOTING PRECISE MCS CORRIDORS, BUT TIMING OF THE UPPER WAVE
AMPLIFICATIONS WILL BE MONITORED IN SUBSEQUENT FORECAST CYCLES, WITH
POSSIBLE RISK AREAS MAINLY FOR DAMAGING WIND POTENTIAL.
..JEWELL.. 08/04/2026
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