275
FXUS65 KGGW 160627
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
1227 AM MDT FRI OCT 16 2026
KEY MESSAGES
- RIDGE OVER THE REGION WILL BRING WARMING TEMPERATURES, PEAKING
ON SATURDAY.
- A COLD FRONT PASSAGE LATE ON SATURDAY WILL DROP TEMPERATURES
BACK CLOSER TO NORMAL FOR NEXT WEEK.
- DRY CONDITIONS ARE EXPECTED THROUGH THE WEEKEND AND INTO NEXT
WEEK.
DISCUSSION
HIGH PRESSURE MOVING OUT OF EASTERN MONTANA THIS MORNING WITH
UPPER RIDGE BUILDING INTO THE NORTHERN ROCKIES. WITH THE
DEVELOPMENT OF A CHINOOK ARCH AND LEE TROUGH, TEMPERATURES WILL BE
WARMING OVER THE NEXT FEW DAYS. PRESSURE GRADIENT BETWEEN THE HIGH
AND THE TROUGH COULD BRING WINDS UP CLOSE TO LAKE WIND CRITERIA
BRIEFLY MIDDAY, BUT WILL BE FAIRLY MARGINAL AND SHORT LIVED.
SHORTWAVE EJECTING FROM THE EASTERN PACIFIC TROUGH WILL FLATTEN
OUT THE RIDGE OVER THE WEEKEND, FOR A DROP IN TEMPERATURES ON
SUNDAY BEHIND A COLD FRONT.
UPPER FLOW WILL TURN INCREASINGLY SOUTHEAST EARLY NEXT WEEK WITH
AN UPPER LOW DIGGING SOUTH OFF THE WEST COAST. BY MIDWEEK FLOW
WILL SPLIT WITH THE UPPER LOW CUTTING OFF FROM THE CANADIAN
NORTHERN NEAR ZONAL FLOW. NEXT CHANCE FOR PRECIPITATION APPEARS TO
BE LATE NEXT WEEK AS THE CLOSED LOW MOVES ONSHORE AND BEGINS TO
OPEN UP. THIS WILL ALLOW IT TO PHASE WITH A NORTHERN STREAM TROUGH
AND PULL PACIFIC MOISTURE NORTHWARD THROUGH THE GREAT BASIN.
FORECAST CONFIDENCE & DEVIATIONS:
- THERE IS HIGH CONFIDENCE IN CONDITIONS REMAINING LARGELY BENIGN
THROUGHOUT THE FORECAST PERIOD.
- NO DEVIATIONS FROM THE NBM.
AVIATION
VFR. GENERALLY CLEAR SKIES EXPECTED THROUGH THE MORNING WITH HIGH
PRESSURE OVER THE REGION. LOW CLOUDS IN WESTERN NORTH DAKOTA WILL
CONTINUE MOVING EASTWARD, BUT COULD SEE A LITTLE VALLEY FOG,
MAINLY AT KOLF OR KSDY AROUND 11Z TO 15Z. HIGH CLOUDS WILL SPREAD
ACROSS THE REGION THROUGH THE DAY.
GGW WATCHES/WARNINGS/ADVISORIES
NONE.
WEATHER.GOV/GLASGOW
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