Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 210354
AFDSLC

Area Forecast Discussion
National Weather Service Salt Lake City UT
954 PM MDT WED JUL 20 2016

.SYNOPSIS...A warm southwest flow will remain over the forecast
area through Thursday, keeping a moist airmass over southern and
eastern Utah. Drier air will move into much of Utah and southwest
Wyoming beginning late Friday.

&&

.DISCUSSION...A southwesterly flow remains in place over the eastern
Great Basin this evening. The airmass remains moist across the
southeastern half of the forecast area with PWAT values over 1 inch,
while the northwestern half of Utah is drier with around 0.5-0.6
inches of PWAT. As a result, storms remained mostly across the
southern mountains and portions of south-central and southeast Utah
today with some locally heavy rain of over 2 inches per radar
estimates. Showers and thunderstorms have decreased with the loss of
daytime heating but a few light showers are expected to continue
through late tonight across southeast Utah.

The pattern will remain similar tomorrow but PWATs will increase a
bit across western Utah. However, this moisture will likely remain
high based and with weak instability there, the bulk of the
convection again will likely remain across the mountains and east.

The pattern is expected to change starting Friday as a trough
passing to the north pushes a cold front into the area. A drier west
to northwest flow will spread into the area for the weekend, after
which an elongated ridge will center itself over the Great Basin
keeping a warm and dry airmass in place.

Updated the forecast mainly to make minor adjustments to PoP/Sky for
the rest of the night.

&&

.AVIATION...Southerly winds will remain in place at the SLC terminal
through the night.

&&

.SLC Watches/Warnings/Advisories...
UT...None.
WY...None.
&&

$$

Cheng

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