Area Forecast Discussion
Issued by NWS Glasgow, MT

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FXUS65 KGGW 261441

Area Forecast Discussion
National Weather Service GLASGOW MT
841 AM MDT Wed Apr 26 2017

.SHORT TERM...for northeast through Fri...

Clear and stable conditions have allowed for clear skies this
morning over some of the eastern zones but once sun warms things
up, clouds will quickly form. Forecast has this covered well.

With upper trough over Alberta/Sask, showers are expected to
develop over central Montana and move into the western zones late
today. Models showing this to mainly affect the SW areas so made
this tweak into forecast grids. TFJ

Previous Discussion...
Broad upper trof over the Front Range and High Plains expected to
remain in place through the end of the week. Various shortwaves
moving through the trof will provide lift for showers during the
period with the general focus of best moisture being over central
Montana. Showers will occasionally move out into the plains, but
weak high reaching into western North Dakota from central Canada will
keep the eastern zones mostly dry.

Overall cool and mostly cloudy conditions with showers in the
western zones expected through Friday. Winds remain relatively
light with no change in airmass anticipated. Ebert

.LONG TERM...Fri night through Wed...

The extended forecast period will be dominated by the large
upper-level low pressure trough pattern draped across most of the
CONUS with many smaller-scale low pressure centers and short-wave
trough spinning and embedded within that flow. These smaller-
scale features will determine the sensible weather in store for NE
Montana through this weekend and into the beginning of next week.

Thankfully, we can expect temperatures to become slightly warmer
than we have recently experienced. The best chances for
accumulating rain will be Sunday evening through Monday morning
with the passage of a cool frontal system from the west and again
with some more disorganized showers arriving from the north on

Enough warm, moist air and some instability line up with the
precip by Monday to entertain the though of some thunderstorms,
but the timing of the daylight hours with the precip seems off.
Will keep it out of the forecast grids for now until confidence



Flight Conditions: Mainly VFR

Synopsis: Weather pattern keeps the region at large trapped in
mid- to low-cloudiness for the next several days. Clear skies this
morning at KSDY will be shortlived.

Ceilings: Generally from 3500 ft to 4500 ft.

Winds: From the east-southeast 10-15 kts, becoming light and
variable at times.





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