Area Forecast Discussion
Issued by NWS Glasgow, MT

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FXUS65 KGGW 260252 AAA
AFDGGW

Area Forecast Discussion...UPDATED
National Weather Service Glasgow MT
852 PM MDT Sun Jun 25 2017

.SHORT TERM...for northeast Montana...tonight through Tue...
This evening the models are showing a surface high sliding
southeast into North Dakota. This has established northeast winds
that will continue veering around to the east, then southeast. It
is this wind that will strengthen Monday to create fire wx
concerns. Otherwise, with northwest flow aloft, expect mostly
clear skies tonight. With a dry forecast, grid edits were few and
minor.

Templer


Previous discussion -
Weak ridging and high pressure at the surface will make for mostly
clear skies, and generally light winds tonight.

Monday the surface high will shift to the south and east into
North Dakota, increasing the surface pressure gradient. This will
increase a dry and warm southeasterly surface flow over northeast
Montana. With temps rising into the upper 80s to near 90, Fire
weather concerns will be present, please see discussion below. A
lake wind advisory has also been issued for Fort Peck Lake.
Gilchrist



.LONG TERM...Tue night through Sun...
Update: A low pressure trough and cold front are forecast to move
across the area early Tuesday morning and exit into the Dakotas
Tuesday afternoon. The forecast was adjusted to increase SE winds
ahead of the front and NW winds behind the front. Current model
forecast are under doing the winds and gridded forecast were
adjusted for this. There will be strong enough winds and RH`s
approaching critical fire weather concerns. A lake wind advisory
will be out for the Tuesday time period as well due to the strong
NW winds.

Another upper level trough brings increasing flow and increasing
chances for showers and thunderstorms Wednesday into Thursday.

Continued unsettled weather continues from Friday and into the
weekend as more in a series of weather disturbances move across
the region.

Previous Discussion:
Upper ridge over the region early in the week breaks down by mid
week as an upper low pushes across the Canadian Rockies. The upper
low then lingers over central Canada for the remainder of the
week. This will result in generally cooler weather (near or below
normal temperatures) with a few showers possible. Ebert


&&

.AVIATION...
Flight category: VFR.

Synopsis: High pressure will rule over the next 24 hours making
for excellent flying weather with occasional mid level clouds.

Winds: Northeast at 5-15kts this evening, going light overnight
except for KGGW 10 kt nocturnal easterly. Expect gusty southeast
winds to pick by mid Monday morning at 10-20kts.


&&

.FIRE WEATHER...

Gusty southeast winds and low humidity will create critical fire
weather conditions for portions of northeast Montana on Monday. A
Red Flag Warning has been issued.

Tuesday could again be near critical as gusty winds with a wind
shift continue with warm temperatures and lowered humidity.
Gilchrist

&&

.GLASGOW WATCHES/WARNINGS/ADVISORIES...
Red Flag Warning from 11 AM to 9 PM MDT Monday for MTZ134>136.

Lake Wind Advisory from 9 AM Monday to 9 PM MDT Tuesday for
Central and Southeast Phillips...Central and Southern Valley...
Garfield...McCone...Petroleum.

&&

$$

weather.gov/glasgow


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