824
FXUS65 KGGW 120529
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
1129 PM MDT FRI SEP 11 2026
KEY MESSAGES
- POSSIBLE RAIN ACROSS THE NORTHEAST PORTION OF MONTANA BEGINNING
SUNDAY AFTERNOON AND LASTING OVERNIGHT.
- SUSTAINED WINDS OF 20 MPH WITH POTENTIAL GUSTS TO 40 MPH WILL
LIKELY RESULT IN CONDITIONS REACHING LAKE WIND ADVISORY CRITERIA
SUNDAY AFTERNOON AND MONDAY AFTERNOON.
- A CHANCE(10-30%) FOR SHOWERS OVERNIGHT TUESDAY AND INTO
WEDNESDAY.
DISCUSSION
AN APPROACHING UPPER-LEVEL LOW WILL CONTINUE TRANSPORTING
MOISTURE INTO REGION, PRODUCING CLOUDY SKIES SATURDAY AND
POSSIBLE RAIN ACROSS THE NORTHEAST PORTION OF MONTANA BEGINNING
SUNDAY AFTERNOON AND LASTING OVERNIGHT. PRECIPITATION TOTALS WILL
RANGE BETWEEN 0.01" AND 0.25".
SUSTAINED WINDS OF 20 MPH WITH POTENTIAL GUSTS TO 40 MPH
ASSOCIATED WITH THE PASSAGE OF THE AFOREMENTIONED LOW WILL LIKELY
RESULT IN CONDITIONS REACHING LAKE WIND ADVISORY CRITERIA. ROUGH
CONDITIONS WILL BEGIN LATE SUNDAY AFTERNOON WITH A SE WIND, RELAX
OVERNIGHT, AND RESUME FOR THE DURATION OF MONDAY WITH A W TO NW
WIND. WAVE HEIGHTS HAVE THE POTENTIAL TO REACH 4.5'.
TUESDAY MOVING FORWARD:
A WEAK RIDGING PATTERN WILL TAKE PLACE OVER MONTANA, ALTHOUGH A
BRIEF INFLUX OF MOISTURE WILL POSE CHANCES FOR SHOWERS OVERNIGHT
TUESDAY AND INTO WEDNESDAY. THERE IS UNCERTAINTY ON RAIN AMOUNTS,
BUT EXPECT LESS THAN 0.05" AT ANY GIVEN LOCATION AS OF THE LATEST
FORECAST. BEYOND TUESDAY, SKIES ARE ANTICIPATED TO CLEAR WHILE
TEMPERATURES WARM SLIGHTLY UNDER CONTINUED WEAK RIDGING.
FORECAST CONFIDENCE & DEVIATIONS:
THERE IS MODERATE CONFIDENCE IN RAIN AMOUNTS THROUGH TUESDAY.
THERE IS MODERATE TO HIGH CONFIDENCE OF SUSTAINED WINDS AT OR
ABOVE 20 MPH ON SUNDAY AND MONDAY ACROSS FORT PECK LAKE.
DON/GAH
AVIATION
LAST UPDATED: 0530Z
FLIGHT CAT RANGE: VFR
DISCUSSION: EXPECT LOW-LEVEL CEILINGS TO SCATTER OUT AND RISE
THROUGH THIS EVENING AND OVERNIGHT. A BROKEN TO OVERCAST LAYER
WILL REDEVELOP LATE SATURDAY MORNING BETWEEN 5,000' AND 8,000'
AGL AND HOLD INTO SATURDAY EVENING. THEN CONDITIONS WILL BEGIN A
SLOW CLEARING FROM NORTH TO SOUTH SUNDAY MORNING.
WIND: W-NW AT 5 TO 10 KT THIS EVENING. BECOMING LIGHT AND
VARIABLE EARLY SATURDAY MORNING THROUGH THE REST OF THE DAY AND
INTO THE EVENING.
DON/GAH
GGW WATCHES/WARNINGS/ADVISORIES
NONE.
WEATHER.GOV/GLASGOW
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