Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 101427

Area Forecast Discussion
National Weather Service Salt Lake City UT
827 AM MDT Tue Oct 10 2017

.SYNOPSIS...An increasingly warm southwesterly flow aloft will
develop across the area later today through Wednesday. A Pacific
Northwest storm system will bring much cooler temperatures for the
latter half of the week.


.DISCUSSION...High pressure is over the forecast area this
morning, resulting in generally tranquil conditions with just a
few high clouds over northern Utah and southwest Wyoming. The
ridge will continue to track east today, with the axis moving east
of Utah this afternoon. The area will see noticeable warming
today, with afternoon maxes running in excess of 10F above what
was observed yesterday, within a couple of degrees of seasonal

Southwest flow is progged to increase across the area tonight into
tomorrow as a Pacific Northwest storm system moves onshore. This
will allow for some breezy conditions and will also result in even
warmer temperatures for tomorrow. Maxes should be running in
excess of 5F above seasonal normals for Wednesday afternoon.

The first wave of the Pacific Northwest trough is expected to
graze northern Utah Wednesday night into Thursday, bringing a
mostly dry cold front through as it does so. This will drop
northern Utah maxes to around 10F below climo for Thursday
afternoon while southern Utah stays near seasonal normals. The
remainder of this system will impact the area Thursday night
through the upcoming weekend, bringing even colder temperatures
(GFS indicates 700 mb temps get as low as -10C by Saturday) but
little in the way to precip due to a lack of associated moisture.

No updates expected to the forecast this morning.


.AVIATION...The SLC terminal will see VFR conditions throughout
the day with a few high clouds. Southeast winds are expected to
shift to the northwest between 17Z and 19Z.





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