Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 250255
AFDSLC

Area Forecast Discussion
National Weather Service Salt Lake City UT
855 PM MDT Sun Sep 24 2017

.SYNOPSIS...A cold upper low will move northeast, and away from
the region tonight through Monday. A new upper low will develop
over western Arizona Tuesday. This low will return north and
impact much of southern and eastern Utah during the latter half of
the week.

&&

.DISCUSSION...The upper low which brought widespread valley rain
and mountain snow to northern Utah today is currently lifting
northeastward across southwest Wyoming. Wrap around precipitation
on the back side of this low has largely ended across northern
Utah and southwest Wyoming, as the upper circulation moves away
from the forecast area, with only a few lingering showers evident
on radar imagery. The primary concerns overnight will be fog
formation across areas where skies clear late tonight through
early Monday morning. Currently have fog mentioned across most
western valleys south of the Wasatch Front overnight, then
developing across sheltered valleys of northern Utah early monday
morning as skies clear. With ample boundary layer moisture and
lingering cloud cover much of the night, it is not anticipated a
hard freeze will occur overnight across these areas. Updated
earlier to reduce PoPs and cancel the going Winter Weather
Advisory in the wake of the departing low.

&&

.AVIATION...VFR conditions are expected to prevail at KSLC through
the morning hours Monday with winds remaining southerly. Ceilings
currently in the 6-7 KFT range are expected to scatter out after
midnight. There is a 20 percent chance visibly falls into the
MVFR range during the 10-14Z timeframe.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...None.
WY...None.
&&

$$

Seaman

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