textproduct: Missoula

DISCUSSION

KEY MESSAGES:

- High Pressure to bring prolonged dry pattern next 7-10 days

The shower activity will continue to diminish across northwest Montana this evening. The only linger showers could be along the Continental Divide around Glacier National Park on Tuesday. Any precipitation associated with these showers will be extremely light causing little to now impacts.

The ridge of high pressure is still on track to be over the Northern Rockies through the remainder of the work week into the weekend. The valley inversions will be strengthening each night, but the extent of fog is uncertain at this time. A few valleys will struggle to warm each day including the Missoula and Flathead valleys, when other valleys are getting up into the 50s by Wednesday these valleys will probably be in the upper 30s to low 40s. The stagnant air could lead to air quality concerns by the end of the week.

The latest long-term model guidance is now showing a 70% chance of this ridge finally breaking down by mid next week.

AVIATION

A few very light showers will continue to move across northwest Montana this afternoon and evening. Any showers the last into Tuesday will be mainly confined to the Glacier National Park region. The terminals across the Northern Rockies are expected to have variable winds with mid to high level clouds streaming over the region tonight into Tuesday. The valleys along the Continental Divide could experience low level wind shear during the overnight hours into Tuesday morning.

MSO WATCHES/WARNINGS/ADVISORIES

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