Area Forecast Discussion
Issued by NWS Glasgow, MT

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FXUS65 KGGW 262115

Area Forecast Discussion
National Weather Service Glasgow MT
315 PM MDT Mon Jul 26 2021


The Devil`s Creek fire continues to burn. Thankfully, wind speeds
are on the light side - maybe 10 mph. We are continuing to
support those firefighting efforts with spot fire weather
forecasts and satellite monitoring.

The excessive heat warning is well in place - today south of the
the Missouri River, then tomorrow for all of northeast Montana.
The strong ridge of high pressure spread over a wide region will
easily allow high temperatures to climb above 100 degrees. A few
locations along the Yellowstone River valley may sneak up around
107 degrees tomorrow.

This high pressure ridge stretches from California in the west, to
Montana in the north, and over to Mississippi in the southeast,
with the center anchored over Wyoming.

Models are hinting at some isolated showers over our region,
which will likely be mostly virga, but not until later this week.
Tried to err on the optimistic side and blend the few models that
are showing precip while others show absolutely nothing. Only
chance is if a small-scale embedded disturbance slides up and
around the peak of the ridge in the NW flow aloft. Still plenty of
uncertainty with timing and amount details.



FLIGHT CATEGORY: VFR, possibly MVFR at times due to haze and
smoke reducing slantwise visibility.

WINDS: From the west and northwest today around 10 kts, becoming
light and variable tonight. From the south at 5-15 kts on
Tuesday, becoming W-NW 5-15 kts in the afternoon, with the passage
of a dry cool front.

DISCUSSION: Hazy/smoky conditions remain in place across the
region, which will reduce visibility at times. Otherwise, upper
level ridging will remain in place allowing for hot afternoon
temperatures that can impact density altitude values.


Excessive Heat Warning until midnight MDT Tuesday night for

Excessive Heat Warning from 9 AM Tuesday to midnight MDT Tuesday
night for Central and Southeast Phillips...Central and Southern
Valley...Daniels...Eastern Roosevelt...Northern Phillips...
Northern Valley...Petroleum...Sheridan...Southwest Phillips...
Western Roosevelt.


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