Area Forecast Discussion
Issued by NWS Glasgow, MT

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FXUS65 KGGW 250901

Area Forecast Discussion
National Weather Service GLASGOW MT
301 AM MDT MON JUL 25 2016

.SHORT TERM...for northeast through Wed...

Northeast Montana begins the day under the boundary of a hot
desert air-mass to the south and cooler trough air to the north.
Winds aloft will be zonal for another day of near normal
temperatures. By evening a weak and shallow short-wave moves
across the Divide as an embedded disturbance that may initiate
scattered showers and thunderstorms.

Tuesday, the hot air-mass nudges the stationary boundary north
into Canada, but flow aloft remains zonal. With increasing
instability in place, embedded disturbances will once again
initiate another round of nocturnal thunderstorms. With Pacific
moisture flowing in with the westerly flow and a strong surface
feed from the east, there will be plenty of moisture for the
storms to work with through Wednesday morning. SPC Convective
outlooks for Tuesday and Wednesday put Northeast Montana in its
coverage for general thunderstorms and marginal risk for eastern


.LONG TERM...Wed night through Mon...

Northwest flow aloft will prevail from Wednesday Night through
Friday. Frequent shortwaves are expected which will bring chances
for showers and thunderstorms.

An upper ridge builds into the area Friday Night and Saturday with
dry and warmer weather.

The ridge moves to the east on Sunday and flow aloft turns to the
southwest. Shortwaves within the SW flow aloft will bring chances for
showers and thunderstorms that will continue into Monday. Forrester


Flight Category: VFR.

High pressure will move to the east today with mostly clear skies.
Light and variable winds will become north at 5 to 10 knots this
afternoon and northeast 5 to 15 knots tonight. A frontal system
tonight will bring mid and high level clouds with an isolated
shower or thunderstorm possible. are expected this morning.




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