Scientific Forecaster Discussion
fxus65 kggw 210317
Area forecast discussion
National Weather Service Glasgow Montana
817 PM MST Wed Nov 20 2019
no changes have been made to the forecast at this time, however,
temperatures will have to be watched closely across the northern
part of the area. Clouds have rapidly cleared and temperatures
have begun to plummet with single digits already evident just
north of the international border. Current temperatures remain in
line with the forecast at this time, but if clouds do not move
back in, temperatures will have to be lowered.
a winter storm that impacted the region this morning has
dissipated. Snow at the Sidney observation site appears to have
recently ended as well. Snow totals coming in have ranged from a
trace in southern counties to roughly a foot near Sheridan
County/Plentywood areas. Freezing fog is being reported near the
border of South Dakota and Montana along I-94 and may continue for awhile today.
An upper trough passing through this evening will bring along cold
temperatures behind the front. A ridge builds behind the front.
Expect clouds to break up tonight, but how cold it will get
tonight will depend on how much cloud cover will continue to hang
around. Models appear to delay clearing to tomorrow morning. These
variables along with light and variable winds may lead to the
possibility of the development of patchy freezing fog as well.
Expect mostly sunny skies and temperatures to moderate into the
weekend. Models appear to bring another shortwave through on
Friday evening, but other than a perhaps breezy day, will otherwise
seem to be benign. Inconsistencies in the models for another
brief shortwave may bring some showers over eastern Montana. The next
major event to watch for may come midweek next week with another
large low to hit the western US just in time for Thanksgiving.
Flight category: MVFR.
Winds: north-northwest at 10 - 20 kts, decreasing this evening to light and
Discussion: patchy freezing fog is possible overnight. Low clouds
linger for rest of today and part of tonight but may begin to
break up tomorrow morning.