053
FXUS65 KGGW 131946
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
146 PM MDT SAT JUN 13 2026
KEY MESSAGES
- TEMPERATURES CLIMB THROUGH TUESDAY, TRENDING DRIER AND WARMER.
- A COLD FRONT IS EXPECTED ON TUESDAY WITH THE NEXT ROUND OF
AFTERNOON AND EVENING THUNDERSTORMS.
- NEAR AVERAGE TEMPERATURES RETURN AFTER MID WEEK.
DISCUSSION
WEATHER PATTERN OVERVIEW:
AN UPPER LEVEL LOW OVER CENTRAL CANADA WITH APPENDING TROUGH
EXTENDING THROUGH EASTERN MONTANA WILL KEEP COOL CONDITIONS OVER
THE REGION TODAY, AND MAY PROVIDE ENOUGH FORCING FOR ASCENT FOR
ISOLATED SHOWERS AROUND MID DAY.
FOR SUNDAY AND MONDAY, THAT TROUGH WILL PUSH DOWNSTREAM, REPLACED
BY NORTHWEST UPPER FLOW AHEAD OF A PACIFIC RIDGE. THIS WILL ALLOW
OVERALL DRIER WEATHER CONDITIONS AND A RECOVERY IN TEMPERATURES.
BY MONDAY, HIGHS FOR MOST OF NE MONTANA WILL BE WELL INTO THE 70S
TO NEAR 80 DEGREES, OR BACK TO SEASONABLE LEVELS FOR THIS TIME OF
YEAR.
THE NEXT UPPER LEVEL SHORTWAVE AND SURFACE COLD FRONT IS SET TO
ARRIVE ON TUESDAY WITH AFTERNOON AND EVENING SHOWERS AND
THUNDERSTORMS LIKELY, ALONG WITH WETTING RAINS. ENSEMBLES CONTINUE
TO SHOW COOL AND UNSETTLED WEATHER CONTINUING IN THE MIDDLE OF THE
WEEK WITH A MODEST WARMUP BY THE WEEKEND AS UPPER RIDGING
TRANSLATES EAST FROM THE PACIFIC SHORE.
FORECAST CONFIDENCE & DEVIATIONS:
INCREASED POPS FOR THIS AFTERNOON.
THERE EXISTS ABOVE AVERAGE CONFIDENCE THROUGH THIS PERIOD
OVERALL. HOTTER TEMPERATURES TUESDAY COUPLED WITH STRONGER WINDS
AND MIN RH VALUES PUT THE HDWI ABOVE THE 50TH PERCENTILE -
SOMETHING TO KEEP A WATCH ON IN SOUTHWESTERN ZONES.
AVIATION
UPDATED: 1930Z
FLIGHT CAT RANGE: VFR
DISCUSSION: BKN MID AND HIGH CLOUDS WILL MAINTAIN THROUGH
TONIGHT BEFORE MOSTLY CLEAR SKIES TOMORROW. A BRIEF, LIGHT RAIN
SHOWER IS POSSIBLE OVER KGDV THIS AFTERNOON.
WINDS: NORTHWEST WINDS 10 TO 15 KTS DURING THE DAY, BECOMING
VARIABLE AFTER 6Z TONIGHT. LIGHTER NORTHWEST WINDS 5 TO 10 KTS
AFTER 18Z TOMORROW.
GGW WATCHES/WARNINGS/ADVISORIES
NONE.
WEATHER.GOV/GLASGOW
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