326
FXUS63 KGRB 041805
AFDGRB
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREEN BAY WI
105 PM CDT FRI SEP 4 2026
UPDATED AVIATION PORTION FOR 18Z TAF ISSUANCE
KEY MESSAGES
- ISOLATED THUNDERSTORMS ARE POSSIBLE LATE THIS AFTERNOON INTO THIS
EVENING. IF STORMS DEVELOP, THEY COULD BECOME STRONG OR SEVERE
WITH DAMAGING WINDS AND LARGE HAIL.
- DRY CONDITIONS PREVAIL THIS WEEKEND, THEN PERIODIC RAIN/STORM
CHANCES EXPECTED THE FIRST HALF OF NEXT WEEK. ABOVE NORMAL
TEMPERATURES TO CONTINUE.
DISCUSSION
ISSUED AT 242 AM CDT FRI SEP 4 2026
SCATTERED THUNDERSTORMS CONTINUE TO MOVE ACROSS THE AREA EARLY
THIS MORNING. THERE HAVE BEEN SCATTERED REPORTS OF STRONG
WINDS/WIND DAMAGE OR LARGE HAIL WITH THE STORMS ACROSS EAST-
CENTRAL WI. MEANWHILE, STILL WATCHING A LINE OF THUNDERSTORMS
ENTERING NORTHWEST WI AS OF 2:30 AM. STILL SOME UNCERTAINTY
ON HOW FAR EAST THESE STORMS WILL MAKE IT INTO NORTHEAST WI
LATER THIS MORNING. OTHERWISE, STORMS SHOULD COME TO AN END
BY MID-MORNING.
OTHERWISE, SKIES WILL BECOME PARTLY CLOUDY WITH WARM AND HUMID
CONDITIONS THIS AFTERNOON. THE COMBINATION OF THE HEAT AND
HUMIDITY IS EXPECTED TO TRIGGER ISOLATED THUNDERSTORMS LATE
THIS AFTERNOON INTO EARLY THIS EVENING. STILL PLENTY OF
INSTABILITY AND SHEAR THAT MAY CAUSE SOME OF THE STORMS TO
BECOME STRONG OR SEVERE WITH DAMAGING WINDS AND LARGE HAIL.
DRY CONDITIONS ARE EXPECTED THIS WEEKEND, THEN THE CHANCES OF
THUNDERSTORMS ARRIVE LATE MONDAY AND CONTINUE INTO TUESDAY
NIGHT AS A COLD FRONT MOVES ACROSS THE AREA. STRONGER STORMS
ARE POSSIBLE TUESDAY AND TUESDAY NIGHT. ABOVE NORMAL TEMPERATURES
WILL CONTINUE INTO THE MIDDLE OF NEXT WEEK WITH HIGHS IN THE
MIDDLE 70S TO MIDDLE 80S. DRY CONDITIONS EXPECTED WEDNESDAY
AND THURSDAY AS HIGH PRESSURE MOVES ACROSS THE REGION.
AVIATION
FOR 18Z TAF ISSUANCE
ISSUED AT 105 PM CDT FRI SEP 4 2026
AN AREA OF LOW CLOUDS WITH IFR AND MVFR CIGS PREVAILED ACROSS MOST
OF THE REGION EARLY THIS AFTERNOON. THESE CLOUDS WERE BECOMING
MORE SCT AT THE EAST-CENTRAL WI TAF SITES AS WELL. HOWEVER,
ANTICIPATE THE MVFR CIGS TO RETURN TO THESE TAF SITES LATER THIS
AFTERNOON INTO THIS EVENING, BEFORE DROPPING TO IFR LATE THIS
EVENING. THE IFR CIGS WILL BE ACCOMPANIED BY AT LEAST IFR VSBYS
DUE TO FOG. SOME SPOTS COULD FALL TO 1/4SM AS WELL. CONDITIONS MAY
BE AT AIRPORT MINIMUMS AT THE TAF SITES. SOME IMPROVEMENT WITH
CIGS AND VSBYS IS ANTICIPATED BY MID-MORNING SATURDAY.
THERE IS STILL A VERY LOW CHANCE (LESS THAN 25%) FOR ISOLATED
STORMS TO DEVELOP LATE THIS AFTERNOON INTO THIS EVENING, BUT
COVERAGE AND CONFIDENCE IS VERY LOW FOR THE STORMS TO MOVE OVER A
TERMINAL; THUS DID NOT INCLUDE A MENTION IN THE 18Z TAFS.
GRB WATCHES/WARNINGS/ADVISORIES
NONE.
DISCUSSION.....ECKBERG
AVIATION.......KRUK
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