Area Forecast Discussion
Issued by NWS Glasgow, MT

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FXUS65 KGGW 241501

Area Forecast Discussion
National Weather Service Glasgow MT
901 AM MDT Sun Sep 24 2017

.SHORT TERM...for northeast through Mon...

Showers in the far east are persisting near the ND border on radar
and surface obs and needed an update to PoPs to compensate for the
next few hours. Petroleum count and southern Phillips county are
also mostly clear with the exception of some fog occuring directly
over the Missouri River into the UL Bend and then up the
Mussellshell River. GAH

Upper low over the Great Basin this morning with trof extending
northward across Montana. Moisture streaming northward across the
Plains. Light showers persist over the eastern zones on the edge
of this moisture stream.

Upper trof easing eastward today will push the showers into North
Dakota with some clearing possible across the west. Cool weather
will continue but potential for sunshine will boost temperatures
in the western zones.

Showers could return to southeast Montana on Monday with upper low
moving across the central Rockies. Ebert

.LONG TERM...Mon night through Sun...

By Monday evening, the slow-moving low pressure trough will have
consolidated into a small, upper-level closed low center directly
over eastern Montana. Most of the precipitation associated with
this trough will have already exited eastward out of the state,
but a few lingering light rain showers will be possible south of
the Yellowstone River valley through Tuesday. It won`t amount to
much more than a few sprinkles if anything at all.

Late Tuesday through late Thursday, another re-enforcing low
pressure trough in NW flow aloft from the Canadian Rockies will
glance our NE corner with a few raindrops late Wednesday night.

Early Friday through Saturday, high pressure will be in control
over our region, bringing warmer and drier weather to NE Montana.

Late Saturday and beyond, a bit more Pacific moisture and more
zonal flow aloft may signal the return of a more unsettled weather
pattern to begin the month of October.





SYNOPSIS: Isolated to scattered showers across KSDY and KGDV
should clear out around or before noon today. MVFR ceilings over
these areas should rise to VFR by tonight.

WINDS: Light and variable today and tonight... becoming southerly
around 10 kts Monday.





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