Area Forecast Discussion
Issued by NWS Glasgow, MT

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FXUS65 KGGW 221530

Area Forecast Discussion
National Weather Service Glasgow MT
830 AM MST Thu Feb 22 2018


Clouds again looked to be lower for today compared to what models
were giving us, so lowered them across the board for today. Rest
of forecast looked to be in fine shape. Jamba

Previous Discussion...
Relatively light winds, mainly clear skies, along with decent
snow cover over the region has brought on strong radiational
cooling overnight. In particular, many of the river valleys have
temperatures early this morning in the 10 to 20 below zero range.
Even with light winds, wind chills colder than 20 below are common
and so will let the current headlines remain in place.

For today and tonight, the cold air mass will persist over
northeast Montana. Blending in some of the mesoscale guidance does
suggest that the coldest temperatures may be more confined to the
river valleys, but it is difficult to rule out whether or not
portions of the area will approach wind chill advisory criteria
yet again. This may in fact be the case, particularly if some of
the colder solutions pan out, however, will let the day shift have
the final call. If anything, it may be a bit more marginal than
previous nights except for the valleys.

The deep western U.S. trough will only gradually translate east
through the weekend. The coldest of the Arctic air mass will
gradually retreat in the coming days, but this large scale pattern
suggests that below normal temperatures remain favored through
this period. Additionally, some weak embedded shortwaves may
locally bring isolated snow showers to parts of the area this
weekend as well. However, at this time, due to lack of moisture,
do not expect much out of this time period in terms of

Due to the usual increasing spread in model solutions at larger
time scales, the forecast was largely trended toward latest
consensus model blends for the period following the weekend. At
this time this results in continued below normal temperatures
along with slight chances for snow at times. Maliawco


Expect VFR conditions across area terminals through the taf cycle
with light and variable winds this morning becoming northwest at 5
to 10 kts after 18z. Maliawco


Wind Chill Advisory until 11 AM MST this morning for Central and
Southeast Phillips...Central and Southern Valley...Daniels...
Dawson...Garfield...McCone...Northern Phillips...Northern
Valley...Prairie...Western Roosevelt.


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