Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 230259

Area Forecast Discussion
National Weather Service Salt Lake City UT
859 PM MDT Mon May 22 2017

.SYNOPSIS...High pressure will shift gradually eastward across
the Great Basin Tuesday into Wednesday then move off to the east.
A series of weather disturbances will impact Utah late Wednesday,
through the first half of the upcoming weekend.


.DISCUSSION...A high amplitude ridge has begun to shift inland
with the axis over ern WA/OR/wrn NV this eve. A weak short wave
trof dropping south thru the Rockies brought extensive fair
weather cumulus to the nern CWA this aftn that has lingered into
the evening. Radar noted a few showers formed out of this and
there were even a few lightning strikes over the Uintas.

The advancing ridge kept skies mostly clear over the rest of the
CWA with just some thin cirrus.

The convection should die off by midnight with skies clearing
overnight. The ridge axis advances to ern NV by 00z Wed and strong
subsidence should keep skies across the CWA clear on Tue with any
clouds limited to just a few flat cumulus over the mtns. Expect
temps to warm several degrees from today`s highs.

The ridge shifts east and heights fall over the CWA on Wed as a
deep trof forms over swrn Canada and a short wave rotating thru
the base of the trof brings convection to the CWA Wed aftn and
night. Additional short waves keep the threat of convection going
into the weekend.

Updated earlier to add low pops to the nrn CWA for the eve and
boost sky cover a bit in the same areas. No additional updates


.AVIATION...Winds at the SLC terminal will switch to southeasterly
between 03z and 04z this evening.





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