textproduct: Glasgow
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
KEY MESSAGES
- Heavier showers exiting into the Dakotas by midday.
- Gusty west winds will continue today. A Lake Wind Advisory remains in effect until 9 PM this evening.
- Cooler than normal conditions are expected to contine. Saturday night expected to be the coolest night.
DISCUSSION
WEATHER PATTERN OVERVIEW: An upper trough will drive northwest flow aloft over Montana, keeping breezy, cloudy, and cool conditions in place. Widespread showers will pass through early this morning associated with an embedded shortwave disturbance. More organized shower activity will exit to the east by midday today, with lighter showers lingering in the afternoon along the hiline north to the Canadian border, and along the North Dakota border.
The main impact through the weekend for most will be the cool temps expected. The upper low will drift east allowing a northerly flow to help drop nighttime temps into the low 40s or even into the upper 30s if we can clear out.
Otherwise, weak disturbances will be moving through the area bringing scattered showers into the weekend.
An upper ridge building over western Canada this weekend will gradually flatten early next week but should provide some warming and drier conditions. Temps should recover to near normal by midweek.
FORECAST CONFIDENCE & DEVIATIONS:
Confidence then remains above average for cool and unsettled weather to continue for next several days given the overall handling of the trough. Confidence in exact timing, placement, and amount of precipitation remains low to moderate given the mesoscale detail still to be worked out a larger time scales.
AVIATION
UPDATED: 0600Z/12:00 AM
FLIGHT CAT RANGE: VFR tonight with some brief MVFR conditions possible with light showers...improving to all VFR by midday Thursday.
DISCUSSION: A passing disturbance will drive widespread showers and brief MVFR cigs tonight. Thursday morning conditions will improve to VFR as the system pushes into the Dakotas. Can not rule out light showers impacting a terminal Thursday afternoon.
WINDS: West to northwest winds at 10-15kts tonight will increase again Thursday morning with gusts to 30kts. Winds will taper off quickly Thursday evening to less than 10kts.
GGW WATCHES/WARNINGS/ADVISORIES
Lake Wind Advisory until 9 PM MDT Thursday for Central and Southeast Phillips-Central and Southern Valley-Garfield-McCone- Petroleum.
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