Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 180234

Area Forecast Discussion
National Weather Service Salt Lake City UT
834 PM MDT Thu May 17 2018

.SYNOPSIS...A slow moving storm system will move across the area
through Saturday, with continued unsettled conditions. Another
slow moving disturbance will move through the area beginning


.DISCUSSION...An upper level trough continues to swing into Utah
and southwest Wyoming, and has helped to produce some showers and
thunderstorms across northern Utah this afternoon/evening, where
there is somewhat increased moisture and instability. While some
stronger thunderstorm activity near the Utah/Idaho border earlier
today produced at least one cold air funnel, most of the activity
south of that border has been weaker, primarily producing outflows
that have generated wind gusts of 25-45 mph.

This threat of convective activity will continue through tonight
and especially during the day Friday, as the upper level cold pool
remains overhead. Friday should also be a cooler day, both due to
increased cloud cover and weak low level cold advection.

The forecast for tonight looks to be in good shape, and no updates
are anticipated this evening.


.AVIATION...The primary concern at the SLC terminal through
tonight will be the threat of gusty, erratic winds due to
thunderstorm activity. With most of this activity expected to be
to the north, continued northwesterly winds are most likely, but
there is a 30 percent chance of variable or southerly winds
developing sometime between 06Z and 14Z.





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