Area Forecast Discussion
Issued by NWS Glasgow, MT

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FXUS65 KGGW 172055

Area Forecast Discussion
National Weather Service Glasgow MT
255 PM MDT Mon Jun 17 2019


The final departure later this evening, of the lingering low
pressure influence from the Canadian prairie is directing the last
push of its isolated shower activity south of Highway 200.

High pressure tries to move into the area, in response to the low
pressure leaving, but multiple periods of short-wave disturbances
riding up and over the northern Rocky Mountains over the next
several days, will keep our region under a rather active weather

The greatest impact will be the arrival of a much more organized
and compact low pressure system from Wednesday night through the
rest of the week. General thinking is that multiple waves or
bands of precipitation will pinwheel through the region. Enough
instability will be present to allow the easy development of
thunderstorms. It is still too early to tell if any of these will
have the potential to become severe.

With each passing day, and updated forecast, the threat for strong
to severe thunderstorms will become clearer, but at this time,
confidence in such forecast details is average at best. BMickelson



Flight Category: VFR.

Discussion: Departing low pressure and slowly building weak high
pressure over the region will help to ensure mainly dry weather
conditions over area terminals today. A passing vicinity shower or
two seem possible for KGDV this afternoon. Calm and quiet
conditions are expected overnight, followed by more thunderstorms
activity beginning Tuesday afternoon.

Winds: East at 7 to 13 kts, becoming light and variable overnight.





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