textproduct: Glasgow

KEY MESSAGES

- Upper level low will bring showers and thunderstorms this afternoon and evening.

- Upper trough lingers most of this week with chances for showers and thunderstorms at times.

- Temperatures will gradually warm to near normal this week.

DISCUSSION

WEATHER PATTERN OVERVIEW:

The vertically stacked low over southern Alberta, SW Saskatchewan and northern Montana will remain rotate through eastern Montana today and tonight and move to Manitoba on Tuesday. A dry slot over eastern Montana early this morning is expected to fill in with convection during the day today as the upper low moves into the area and diminish tonight as the low moves to the northeast. As the low exits the forecast area tonight, gusty west winds will develop with a Lake Wind Advisory likely for Fort Peck Lake on Tuesday. There will be chances for more showers and thunderstorms as shortwaves move through NE Montana around the upper low to the NE.

A broad upper trough will remain in place over western Canada and western US for the remainder of the week that will continue to bring chances for showers and thunderstorms every day. Temperatures will gradually warm through Friday.

FORECAST CONFIDENCE & DEVIATIONS: Low confidence on timing any showers and thunderstorms over the next few days. High confidence on the warmer temperatures as the week progress. No deviations from the NBM at this time.

AVIATION

UPDATED: 0530z Monday June 29th

FLIGHT CATEGORY: VFR most of the time. Areas of MVFR this afternoon and evening.

DISCUSSION: Skies will be either clear or with SCT-BKN mid clouds this morning. Cumulus will develop during the day today and areas of showers and thunderstorms are expected this afternoon and evening with MVFR conditions possible at times.

WINDS: South to SE 5 to 10 knots this morning becoming south to SW this afternoon 5 to 15 knots and turning west to SW this evening.

GGW WATCHES/WARNINGS/ADVISORIES

None.