Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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000
FXUS65 KSLC 160425
AFDSLC

Area Forecast Discussion
National Weather Service Salt Lake City UT
925 PM MST Mon Jan 15 2018

.SYNOPSIS...High pressure over the Great Basin will continue to
weaken tonight into Tuesday. A weak system will cross the area late
Tuesday through early Wednesday. A strong cold front will cross Utah
Friday with a cold upper trough remaining over the area Saturday.

&&

.DISCUSSION...The high-amplitude ridge over the Great Basin has
shifted to near the UT/NV border this evening. Meanwhile, a shallow
backdoor cold front continues to make its way farther into central
Utah. An area of stratus has increased over southwest Wyoming,
northeast Utah, and the Uinta Basin behind the cold front while high
clouds continue to spread into the area from the west and northwest.
An easterly 9mb MSLP gradient is analyzed between KRKS and KSLC and
is resulting in some canyon winds which are increasing along the
Wasatch Front and Cache Valley and which should continue through
late tonight. Due to the shallow nature of the easterlies, however,
these winds will not be especially strong.

Upstream, a splitting trough is approaching the West Coast and is
expected to cross Utah late tomorrow afternoon through tomorrow
evening. This weakening wave is not expected to produce much in the
way of precipitation. However, things continue to look good for a
storm Friday into the weekend.

Updated the forecast mainly to increase sky cover in areas of
stratus and to make very minor tweaks to various other weather
elements overnight.

&&

.AVIATION...Light southeasterly winds are expected to prevail at the
SLC terminal through the night, although they may remain light and
variable at times through 06-07z. Otherwise, expect VFR conditions
under high clouds.

&&

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

$$

Cheng

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