Area Forecast Discussion
Issued by NWS Glasgow, MT

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FXUS65 KGGW 252043

Area Forecast Discussion
National Weather Service GLASGOW MT
243 PM MDT Tue Apr 25 2017

.SHORT TERM...for northeast Montana...tonight through Wed...

System over northeast Wyoming today redevelops well to our east
while an upper low spins over southern Alberta and western
Saskatchewan. A surface high over central Canada will drift east
and take the some of the cold air in the region with it. Pacific
moisture will stream into the Pacific NW tonight and Wednesday
with most it staying to our south and west.

Temperatures are expected to warm a tad but still remain below
normal with highs Wednesday in the 40s east to 50s west. TFJ

.LONG TERM...Wed night through Tue...
The long range pattern as described by the previous shift remains
largely on track. Forecast has been trended to reflect the latest
12Z consensus model blends. A highly amplified trough over the
western and Central CONUS will have much influence in this period
with cloudy and cool temperatures with occasional showers
generated along the front range spilling into the CWA. As moisture
gets cutoff into the weekend there could be some clearing with
warmer temperatures, though another shortwave will likely approach
the forecast area early next week with additional shower chances
for northeast Montana. Maliawco

Previous Long Term Discussion...
Longwave trof over the western/central CONUS will dominate the
weather pattern for the extended period. Shortwaves diving into
the trof will generate showers along the front range, and possibly
extending into the plains through the middle of the week. With
the cold trof overhead and plenty of cloud cover, temperatures
will remain below normal, with showers turning to snow in the
overnight periods possible.

Late in week the development of a stronger storm system in the
desert southwest will cut off much of the moisture into the
northern plains. Should see showers ending and some sun peeking
through to warm temperatures closer to normal for the weekend.

As a storm system lifts toward the Great Lakes early next week,
showers are expected to return to the state with next shortwave
diving into the lingering trof. Ebert



Flight Conditions: VFR, possibly briefly dropping to MVFR at KSDY
and KGDV tonight.

Low clouds may briefly drop back to MVFR levels tonight from KSDY
to KGDV. Precipitation is expected to remain well to our south
and east.

Winds: Decreasing easterly winds to less 10 kts tonight except at
KGGW. Then increase Wednesday to 10-15 kts, highest at KGGW. TFJ




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