Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 211544

Area Forecast Discussion
National Weather Service Salt Lake City UT
944 AM MDT Mon May 21 2018

.SYNOPSIS...A drier southerly flow will set in today ahead of a
storm system that will create more unsettled weather Tuesday into
Wednesday. A ridge will build in for the end of the week.


.DISCUSSION...A large upper level low continues to spin over the
southern half of California this morning, sending increased cloud
cover into Utah and southwest Wyoming. Another day of afternoon
showers and thunderstorms, initiating primarily over the higher
terrain, is expected, though coverage will probably be less than
yesterday. The primary focus through 00Z Tuesday should be in the
northern half of the forecast area, with drier air in the low
levels working into the far southern and southeastern portions of

After 00Z Tuesday (i.e.- heading into the evening hours),
convective activity should begin to increase across southwestern
Utah as well, as the closed upper low slides over southern Nevada.
This feature will slowly but surely push into Utah through the day
Tuesday, with a day of decently widespread thunderstorm activity
expected, though cloud cover could be a limiting factor in some

The forecast for today looks good and no updates are planned
through the morning.


.AVIATION...Light and variable winds at the SLC terminal as of 16Z
are expected to increase from the north around 18-19Z. There is a
30 percent chance of showers or thunderstorms impacting the
terminal today, with gusty erratic winds as the most likely





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