Area Forecast Discussion
Issued by NWS Glasgow, MT

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FXUS65 KGGW 220859
AFDGGW

Area Forecast Discussion
National Weather Service Glasgow MT
259 AM MDT Fri Mar 22 2019

.DISCUSSION...

Upper ridge will dominate over Eastern Montana and the Dakotas for
one more day before it moves to the east on Saturday. Warm and dry
weather will continue through Saturday with snow cover limiting
temperatures somewhat in snow covered areas. Meanwhile, continued
snow melt will continue to bring flooding to parts of the region.
Late night and early morning fog can be expected in some low lying
areas.

A cold front drops south across the area late Saturday
Night and Sunday morning. There will be enough moisture for a good
chance of rain mixed with snow Sunday and Sunday Night.
Temperatures will be near the rain/snow threshold during the day
on Sunday and should be cold enough for all snow Sunday Night.
Models still differ on amount of precipitation and snow at this
point.

Temperatures remain cool on Monday as system moves to the east.
Upper ridge rebounds on Tuesday with warm and dry weather.

The next system is expected for mid week with cooler temperatures
and chances for rain and snow. Forrester



&&

.AVIATION...

FLIGHT CAT: VFR most of the time. MVFR and IFR possible this
morning in fog and again late tonight in fog and low clouds.

DISCUSSION: Clear skies this morning will give way to increasing
mid and high clouds this afternoon and evening. Patchy fog is
also possible this morning. However, with east winds being
stronger than yesterday morning last the chance for airport
shutdown criteria was too low to include in the TAF directly.
Patchy fog could return again tonight.

WIND: East to SW around 10 kts today and tonight.


&&

.HYDROLOGY...

Area creeks and streams are flowing more readily and adding to
larger rivers downstream with levels rising for many locations.

Ice Jams on the Yellowstone River has brought flooding to the
Glendive. Have issued a Flood Warning there.

Beaver Creek west of Hinsdale has risen to 16.6 feet at 230 am.
Have replaced the Flood Advisory there with a Flood Warning as
some roads start to flood at 16 feet in that area.

There is a Flood Advisory in effect for Big Muddy Creek in
Sheridan. The gage at Antelope has risen above the flood stage of
12 feet.

Have also, received reports of minor road flooding across portions
of Petroleum county due to ice in culverts preventing snow melt
from flowing in the road side ditches.  A Flood Advisory is in
effect for Petroleum county. Snow melt is also causing flooding
over Prairie County where a Flood Advisory also remains in
effect. The Redwater River through southern and eastern McCone
County has seen similar rises. and a Flood Advisory is also in
effect there.

To monitor river stage readings, go to our Advanced Hydrologic
Prediction Service (AHPS) page at www.weather.gov/glasgow then
click on "Rivers and Lakes" then "River Observations". Data for
this page are provided by the USGS.


&&

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

&&

$$

weather.gov/glasgow


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