Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 180348

Area Forecast Discussion
National Weather Service Salt Lake City UT
948 PM MDT Sun Sep 17 2017

.SYNOPSIS...An upper level trough will push a cold front across
northern Utah Monday night through Tuesday. A second stronger upper
trough will bring much colder temperatures and periodic valley rain
and mountain snow to much of the area beginning Wednesday night and
continuing through next weekend.


.DISCUSSION...A weak shortwave trough continues to cross Utah this
evening, and its axis should be east of the area before sunrise. A
few weak showers lingered on into the evening hours, but most have
now tapered off while some mid and high clouds continue to cross the
area. A warmer airmass in general over the area today will result in
slightly warmer overnight mins compared to last night, but the
relative lack of cloud cover will still allow most valleys to fall
into the 40s and 50s.

South winds will increase tomorrow ahead of the next trough. Good
mixing combined with 700mb temperatures rising to around 9-10C over
much of the area should bring a continued warming trend. The cold
front associated with this trough will then cross northern and
central Utah tomorrow night through Tuesday, but will not make it
much farther than that as the upper jet will remain across far
northern Utah.


.AVIATION...VFR conditions will persist at the SLC terminal through
the night with prevailing southerly winds. Scattered clouds will
continue to cross the area through late tonight. CIGS are not
expected, but if any do develop, they will be above 7000 ft.





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