Area Forecast Discussion
Issued by NWS Glasgow, MT

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FXUS65 KGGW 280125

Area Forecast Discussion
National Weather Service Glasgow MT
725 PM MDT Sun May 27 2018

No major changes to the forecast with this evenings update.

Previous discussion...
Closed upper low over the Great Basin today slowly drifts
northeast through Tuesday. Surface high pressure over Prairie
Provinces drifts east and allows moisture to drift north into the
area Memorial Day. Showers and some thunderstorms will move in
with an increase in low level moisture for Monday Night. Some
storms later Monday from the southeast may be strong but not too
severe. The Storm Prediction Center has a Marginal Risk for severe
thunderstorms over the SE corner of the CWA.

On Tuesday Night-Wednesday, the upper low finally exits through
the Dakotas while a ridge then trough progresses in from the west.
Some moderate showers can be expected near the ND border. The
next trough will spread showers/thunderstorms in starting
Wednesday Night with slight severe possibilities Wednesday Night
west and the entire CWA Thursday and Thursday Night. CAPE looks
best over the southern or SE half of CWA right now.

Deep upper low then cuts off north of Montana Saturday allowing
for unsettled conditions with showers and breezy conditions. Temps
will be closer to normal. TFJ



FLIGHT CAT: VFR. MVFR at times KGDV Monday.

DISCUSSION: Low pressure over the central Rockies will drift
northeast a bit over the next couple days. Look for an increase
in showers/isolated thunderstorms from the south Monday. These
storms may spread as far north as the Glasgow area by Monday

WIND: East winds generally less than 10 knots tonight, then
increasing into Monday afternoon 10-20kts with gusts to around 25

Outlook: MVFR to possible IFR conditions Monday Night with low
ceilings and possible high elevation fog.





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