615
FXUS65 KGGW 102051
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
251 PM MDT THU JUL 10 2025
DISCUSSION
KEY MESSAGES:
1) A FRONTAL SYSTEM WILL ARRIVE LATE THIS AFTERNOON AND GENERATE A
FEW RAIN SHOWERS AND WINDS OF 20 TO 30 MPH INTO THE EVENING. A
LAKE WIND ADVISORY IS IN EFFECT.
2) EXPECT A BRIEF COOL DOWN FRIDAY WITH HIGHS IN THE 70S. THEN A
RETURN TO 90S SATURDAY AND SUNDAY AS A RIDGE BUILDS BACK IN.
3) A COOL DOWN WITH ISOLATED SHOWERS AND THUNDERSTORMS ON THE
FRONT IS AGAIN EXPECTED EARLY NEXT WEEK.
WEATHER PATTERN OVERVIEW:
APPROACHING COOL FRONT IS ALREADY GENERATING SOME SCATTERED
SHOWERS AND THUNDERSTORMS THIS AFTERNOON. BEST MODEL CONSENSUS
KEEPS THIS ACTIVITY NEAR AND NORTH OF US-HIGHWAY 2 THIS EVENING,
BUT THE ROUGE STORM OR TWO MAY SNEAK SOUTH. OVERNIGHT TONIGHT AND
EARLY FRIDAY MORNING, STORMS WILL REFORM ALONG THE FRONT, NEAR
AND SOUTH OF MT-HIGHWAY 200, AND QUICKLY RETREAT AND DIMINISH AWAY
TOWARD THE SOUTHEAST.
RELIEF, IN THE FORM OF COOLER AIR IS EXPECTED BRIEFLY FRIDAY.
HEAT WILL RETURN UNDER ANOTHER DOME OF HIGH PRESSURE ON SATURDAY
AND SUNDAY.
THIS HEAT DOME IS EXPECTED TO EXIT WITH ANOTHER COLD FRONT
THROUGH MONDAY AND TUESDAY. WHILE CONDITIONS DO COOL OFF MID-WEEK,
CONFIDENCE IN THE FORECAST FROM ABOUT TUESDAY ONWARD DOES DROP
OFF RAPIDLY AS ENSEMBLES SPLIT APART QUICKLY THERE AFTER.
FORECAST CONFIDENCE & DEVIATIONS:
DEVIATIONS INCLUDED...BLENDING HI-RES WINDS INTO THE FORECAST
TODAY THROUGH TOMORROW.
POPS TODAY THROUGH TONIGHT NEEDED HI-RES ADJUSTMENTS TO PROVIDE
MORE DETAIL COMPARED WITH THE NBM. SOME SKY COVER GRID
ADJUSTMENTS WERE MADE TO ACCOUNT FOR THESE SHOWERS
CONFIDENCE FROM TUESDAY ONWARD IS LOW AS ENSEMBLES BEGIN
DISAGREEING AT THE SYNOPTIC SCALE HERE FORWARD ACROSS THE REGION.
AVIATION
LAST UPDATED: 2045Z
FLIGHT CAT RANGE: VFR.
DISCUSSION: A NEW WAVE OF ISOLATED RAIN SHOWERS AND THUNDER-
STORMS DROPS DOWN FROM THE NORTH TODAY AND THROUGH THE EVENING
HOURS. THIS ACTIVITY SHOULD EXIT THE TERMINALS AROUND 10-12Z
TONIGHT.
WINDS: FROM THE W AND NW AROUND 10 TO 15 KTS THROUGH THIS AFTERNOON.
IN THE LATE AFTERNOON, A COLD FRONT WILL INCREASE WIND SPEEDS TO
15 TO 20 KTS AND GUSTS 30 KTS THROUGH TONIGHT. EXPECT GRADUALLY
DIMINISHING WINDS FROM THE NW ON FRIDAY.
GGW WATCHES/WARNINGS/ADVISORIES
LAKE WIND ADVISORY UNTIL 5 AM MDT FRIDAY FOR CENTRAL AND
SOUTHEAST PHILLIPS-CENTRAL AND SOUTHERN VALLEY-GARFIELD-MCCONE-
PETROLEUM.
WEATHER.GOV/GLASGOW
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