Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 190406
AFDSLC

Area Forecast Discussion
National Weather Service Salt Lake City UT
1006 PM MDT MON JUL 18 2016

.SYNOPSIS...High pressure over the southern plains with an upper
level trough settling into the Pacific Northwest will leave the
Great Basin under a southwest flow through much of the week, with
deep moisture over southern and eastern Utah.

&&

.DISCUSSION...Southwesterly flow remains in place over Utah this
evening while moisture continues stream into eastern Utah. A sharp
moisture gradient currently extends from around St. George to the
Uinta mountains. Southeast of this line, PWAT values have climbed to
one inch or more, while generally remaining in the 0.3 to 0.7 inch
range to the northwest. Showers and thunderstorms have mainly
remained confined to south-central through eastern Utah today,
although a few convective cells have formed along the moisture
gradient along the Wasatch Front. Convection has decreased now with
the loss of daytime heating, leaving some scattered showers which
have started to turn more stratiform. Showers will continue to
decrease overnight, but may not completely end across southeast Utah.

An upper low currently off the PacNW coast will weaken and start
ejecting across far northern Idaho and the Canadian Rockies tonight
into tomorrow. This will flatten the ridge a bit and nudge it east
from its current position over the Texas and Oklahoma panhandles.
This will allow a bit of drying to occur over the area and as a
result showers and thunderstorms may shift a bit farther east
tomorrow but enough moisture will linger for isolated to scattered
showers to develop again over the the mountains and east.

Updated to make minor adjustments mainly to PoP.

&&

.AVIATION...Isolated high based showers have developed across the
Wasatch Front...and will continue to move across the area through
06Z. These high based showers will have the potential to bring gusty
and erratic winds to the SLC terminal through this time.
Otherwise...south winds will remain in place through the night.

&&

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

WY...None.
&&

$$

Cheng

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