textproduct: Glasgow

KEY MESSAGES

- Moderate snow and gusty northwest winds will lead to blizzard conditions at times in the NE corner of the state this morning. .

- Cold arctic air will be in place through at least Friday.

DISCUSSION

WEATHER PATTERN OVERVIEW:

Snow continues early this morning along and northeast of a line through Opheim, Glasgow, and Sidney. Meanwhile, gusty northwest winds will continue to produce blowing and drifting snow especially where the snow is heaviest on the radar which is the northeast corner of the state. Will maintain Blizzard Warning in the NE corner of the state for now which included Daniels, Sheridan, and Roosevelt Counties and cancel Valley, McCone and northern Phillips Counties. The snow will gradually exit the state this morning and remaining Blizzard Warning areas will likely be cancelled this morning when the snow ends.

Plan on cancelling the High Wind Warning expire as wind speeds have diminished to 20 to 35 mph at 3 am. During the daytime hours look for the snow to exit to the northeast. Gusty northwest winds will continue though gradually diminishing in intensity.

Meanwhile, Cold Weather Advisory headlines for Phillips and Northern Valley Counties continue to look good for this morning. At this point, wind chills tonight are borderline for a cold advisory in the north as lower wind speeds are expected even though temperatures will be colder.

Moisture overrunning the stationary front over western Montana will bring chances for light snow late tonight and Thursday.

The Arctic air mass will remain in place through Friday before gradually pushing northeast over the weekend and early next week as a western U.S. ridge begins to translate eastward toward the Rockies and Northern High Plains.

FORECAST CONFIDENCE & DEVIATIONS:

Forecast largely followed NBM and WPC guidance this forecast cycle. However, lowered temperatures a few degrees today as observed temperatures overnight have been somewhat colder than the NBM forecast.

Confidence is high on continued gusty winds today and snow in the NE corner early this morning. Confidence is moderate on the timing of the snow exiting the state this morning. Confidence is high on the cold arctic air mass remaining in place until at least Friday but low on the timing of when warmer temperatures will move in this weekend and beyond.

AVIATION

LAST UPDATE: 0900Z

FLIGHT CAT RANGE: Ranging from VFR to IFR. DISCUSSION: Moderate snow and blowing snow will continue in the northeast corner of the state until 15z this morning. Areas of blowing and drifting snow will continue today. Variable clouds bases are expected today which will vary from VFR, MVFR to IFR. Low clouds are expected tonight with MVFR cigs.

WINDS: Northwest winds 20 to 30 knots this morning will diminish to 15 to 25 knots this afternoon and 10 to 20 knots tonight.

GGW WATCHES/WARNINGS/ADVISORIES

Cold Weather Advisory until noon MST today for Central and Southeast Phillips-Northern Phillips-Northern Valley-Southwest Phillips.

Blizzard Warning until 5 PM MST this afternoon for Daniels- Eastern Roosevelt-Sheridan-Western Roosevelt.

Winter Weather Advisory until 6 AM MST early this morning for Richland.