Area Forecast Discussion
Issued by NWS Glasgow, MT

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FXUS65 KGGW 272157

Area Forecast Discussion
National Weather Service GLASGOW MT
257 PM MST Mon Feb 27 2017

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

Aside from lingering snow showers along the Montana/North Dakota
border, the steady accumulating snow has largely ended across the
region. Therefore, the Winter Weather Advisory has been cancelled.

Southwest upper flow on the leading side of an upper trough
centered over the Pacific Northwest will prevail across northeast
Montana tonight and Tuesday with scattered light snow showers at
times over the area. This is especially true on Tuesday though
accumulations look light.

The trough axis will shift east over eastern Montana and Wyoming
for Wednesday with additional forcing for ascent and a little
Pacific moisture. A chance of snow is expected from west to
east, though may end as rain if temperatures warm enough on the
back side of the trough axis as it passes by late in the day on
Tuesday. Maliawco

.LONG TERM...Wed night through Mon...
Made very few changes to the long term forecast. Mainly blended
the forecast with the latest 12z models. There still is
uncertainty regarding the precise timing and location of
precipitation toward the end of the week, so didn`t want to
necessarily favor any model over another too much. Even so, it
still looks like Sunday will be the best chance for accumulating

Previous Discussion...
Upper trof moves through the region midweek with flow pattern
transitioning to flatter westerly flow off the Pacific during the
end of the week. This will result in warming temperatures into the

Precipitation chances through the period are less clear. Models
indicate some overrunning precipitation possible on Thursday night
as warm air begins to work into the region. A weak cold front
drops south from Canada on Saturday with scattered showers
possible. A stronger shortwave trof pushes through the state on
Sunday bringing the best potential for accumulating snowfall.



conditions have improved through the afternoon with snow gradually
decreasing from west to east. skies are partly cloudy at kggw and
kolf and overcast at ksdy and kgdv at 22z. look for the mvfr cigs
returning to all the sites through tonight.




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