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:

- Warming and drying trend through Sunday; cool/cold valley lows with patchy frost.

- Increased westerly winds on Monday.

A ridge of high pressure will be building over the Northern Rockies this weekend causing a warming and drying trend. Then on Monday into Tuesday a weak disturbance moves along the Canadian border causing the ridge to flatten. The biggest impact from this disturbance will be increased westerly winds on Monday afternoon.

A strong ridge of high pressure builds back over the western United States Wednesday through Friday bringing another round of unseasonably warm and dry conditions. The latest long term guidance is showing around a 75% probability of a pattern change next weekend. Details on the change is uncertain at this time, but cooler, increased winds and potential for precipitation should be expected for the Northern Rockies.

AVIATION

Most terminals should experience winds of 5-10kts with the potential gust up to 20 kts this afternoon and evening. A ridge of high pressure will be building over the region tonight into Saturday. This ridge will cause increased stable conditions which in turn could allow for the development of patchy valley fog that might impact KGPI and KMSO. Beyond the wind this afternoon and potential of fog Saturday morning, fair flying conditions are expected for the next 24 hours.

MSO WATCHES/WARNINGS/ADVISORIES

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

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