Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 220328
AFDSLC

Area Forecast Discussion
National Weather Service Salt Lake City UT
928 PM MDT Mon Aug 21 2017

.SYNOPSIS...Southerly flow aloft will draw moisture north across
the forecast area through Tuesday. Somewhat drier air will return to
the south midweek, then spread through the entire area towards the
end of the week.

&&

.DISCUSSION...Water vapor satellite imagery and model analyses
continue to show a closed low off the southern California coast. A
shortwave disturbance ejecting out of the closed low is lifting
across northwest Arizona this evening and will shift into southern
Utah by late tonight or early tomorrow morning.

Ahead of this wave, moisture continues to slowly increase across
southern and central Utah with PWATs generally in the 0.75-0.9 inch
range at this time. This moisture combined with some modest
instability led to the development of showers and thunderstorms once
again today mainly over the higher terrain and across portions of
southern and central Utah. Much of the convection across the north
has waned with the loss of daytime heating. However, across the
south, expect isolated to scattered rain showers and a few
thunderstorms to persist through the night due to the aforementioned
shortwave disturbance approaching from Arizona.

This shortwave disturbance will lift north through Utah tomorrow
through tomorrow night. Showers and thunderstorms are expected to
develop across southern and central Utah again during the morning
through early afternoon hours tomorrow, then focus more on central
and northern Utah during the late afternoon and into the nighttime
hours.

&&

.AVIATION...VFR conditions will continue through the night at
the KSLC terminal. Southerly winds will become established by
04z.

&&

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

$$

Cheng

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