textproduct: Missoula

This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.

DISCUSSION

KEY MESSAGES:

- Showers and thunderstorms along the Divide this afternoon.

- Warming trend Tuesday through Thursday

- Cooler and showery conditions expected next weekend

A low pressure system over Alberta will cause isolated and scattered showers and thunderstorms today along the Continental Divide, especially around Glacier National Park. This low will be slowly moving off to the east, so the latest guidance is indicating another round of convection over the same area on Monday afternoon and evening.

Then a ridge of high pressure will be building over the region Tuesday through Thursday. This ridge will bring a warming and drying trend over the Northern Rockies for a few days. Temperatures will well above seasonal averages by Thursday as readings will be in the upper 80s to low 90s for most valley locations and triple digits for the Riggins area.

The long term models are showing a large low pressure system moving into the Pacific Northwest by next weekend causing significant cooling with widespread precipitation. Temperatures by Saturday are anticipated to be around 10 degrees below seasonal normals.

AVIATION

A low pressure system over Alberta will cause mid to high levels clouds to stream over northwest Montana along with scattered showers and thunderstorms, especially near the Continental Divide. KGPI has the best potential for nearby showers this afternoon and evening.

MSO WATCHES/WARNINGS/ADVISORIES

MT...None. ID...None.

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