Area Forecast Discussion
Issued by NWS Glasgow, MT

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FXUS65 KGGW 260312
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
912 PM MDT Thu May 25 2017

.SHORT TERM...for northeast Montana...tonight through Sat...
9PM UPDATE:

Wind is expected to continue on the downward trend over the next
hour, therefore ended the lake wind advisory at 9 PM. Trends
continue down on PoPs for the region also. Minor updates done to
forecast elements to bring them around to current conditions.
Proton

6PM UPDATE:

Minor adjustments made for current conditions. The low will
continue to slowly move away from the region this evening. Will
keep the lake wind advisory through 9 PM with wind still gusting
to 40 mph.     Proton

Previous Discussion:

The large and slow-moving storm system currently spinning through
the region with light or isolated and scattered rain showers
spreading across portions of NE Montana. Expecting nothing more
than a few sprinkles here and there now through tonight as a
result.

Friday and Saturday: As the upper-low center pinwheels east and
northeast over Manitoba, NE Montana remains under a generally
unsettled but weak general trough pattern with a short-wave trough
pushing through the Snake River Valley and Central Rockies region.
Again, not expected anything more than hit and miss isolated rain
showers.

On Saturday, NW flow aloft returns to the region as the next
upper-level ridge of high pressure approaches from the west,
generally keeping precipitation away from NE Montana.

BMickelson


.LONG TERM...Sat night through Thu...

Update: The discussion as described below stands. With a
relatively benign pattern expected through the extended, the
forecast was trended toward the latest model consensus and only
minor tweaks were made beyond that. Gilchrist

Previous long term discussion: The long term features a departing
upper low pressure system with an upper ridge building across the
western U.S. and extending into Montana early next week. The
ridge axis looks to reach eastern Montana by about Thursday via
00z model guidance, with mainly dry and warmer weather conditions
throughout this time period.

Late Thursday into Friday the ridge axis will shift east as a new
upper trough digs into the Pacific Northwest. and this will bring
the next potential for scattered showers, perhaps a little
thunder, to northeast Montana. Depending on the precise evolution
of that next low pressure system, additional rain chances may
continue into the first weekend of June. Maliawco


&&

.AVIATION...
Flight category: Mainly VFR.

Synopsis: Low pressure over Saskatchewan will drive an active
northwest flow aloft over northeast Montana. Expect isolated to
scattered showers at times, and breezy northwest winds to continue
into Friday. Winds will taper off some during the nighttime hours
as more stable conditions rule.

Gilchrist

&&

.GLASGOW WATCHES/WARNINGS/ADVISORIES...NONE.

&&

$$

weather.gov/glasgow


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