579
FXUS65 KGGW 221604
AFDGGW
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GLASGOW MT
904 AM MST TUE JAN 22 2019
DISCUSSION
MORNING UPDATE...
PRIMARY UPDATE THIS MORNING WAS TO THE HOURLY TEMPERATURES AS
AREAS THAT CLEARED OUT EARLIER THIS MORNING SAW TEMPERATURES
PLUMMET DOWN TO AROUND ZERO DEGREES, INCLUDING MALTA. THESE
TEMPERATURES WILL GRADUALLY RECOVER THROUGHOUT THE DAY WITH HIGHS
EXPECTED TO BE IN THE MIDDLE 20S TO LOWER 30S.
-MOTTICE
ORIGINAL DISCUSSION...
LOW CLOUDS OVER MUCH OF EASTERN MONTANA THIS MORNING EXPECTED TO
MOVE OUT OF THE REGION WITH THE HIGH PRESSURE SLIDING SOUTH.
SHORTWAVE PUSHING THROUGH THE TOP OF THE PACIFIC RIDGE IS EXPECTED
TO DEVELOP A BRIEF CHINOOK ALONG THE FRONT RANGE TODAY, BEFORE
BRINGING A COLD FRONT OUT OF CANADA ON WEDNESDAY. THIS WILL MEAN
WARMER DOWNSLOPE WINDS TODAY, FOLLOWED BY COLDER NORTH WINDS ON
WEDNESDAY WITH UPSLOPE FLOW PRODUCING SNOW MAINLY OVER THE
SOUTHWEST ZONES.
COLD HIGH PRESSURE PUSHES INTO THE NORTHERN PLAINS WEDNESDAY
NIGHT, AND WITH TEMPERATURES DROPPING TO NEAR OR BELOW ZERO, ALONG
WITH ENOUGH WIND DUE TO COLD AIR ADVECTION, WIND CHILLS MAY REACH
CRITICAL LEVELS BY THURSDAY MORNING.
UPPER RIDGE REBOUNDS QUICKLY OVER THE WEST, AND WITH SEVERAL
SHORTWAVES SLIDING THROUGH THE FLOW, SHOULD SEE ARCTIC BOUNDARY
RETREAT EASTWARD AND WARMING TEMPERATURES FOR THE END OF THE WEEK.
A STRONGER ARCTIC TROF IS EXPECTED TO DROP ACROSS WESTERN CANADA
EARLY NEXT WEEK. THIS WILL PUSH COLDER AIR AND POSSIBLY SOME
ACCUMULATING SNOW INTO NORTHERN MONTANA. EBERT
AVIATION
MVFR WITH LOW CLOUDS THROUGH THE MORNING. THESE CLOUDS WILL
GRADUALLY CLEAR DURING THE DAY WITH VFR CONDITIONS RETURNING.
GLASGOW WATCHES/WARNINGS/ADVISORIES
NONE.
WEATHER.GOV/GLASGOW
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