Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 221601

Area Forecast Discussion
National Weather Service Salt Lake City UT
1001 AM MDT Mon May 22 2017

.SYNOPSIS...High pressure aloft will expand east across the Great
Basin through Tuesday, then shift east of the area on Wednesday.
The next storm system will impact the region during the latter
half of the week.


.DISCUSSION...High pressure aloft positioned along the west coast
will expand east across the Great Basin through Tuesday. The
resultant warming trend as the high shifts into and then east of
the state will leave temps running about 5 to 15 degrees above
late May norms midweek.

Residual moisture across northeast Utah along with differential
heating will create extensive cumulus development over the higher
terrain along with a few showers late this afternoon and early
evening. These clouds and any lingering showers should dissipate
with the loss of daytime heating by mid-evening.

The next upper level trough will drop southeast from the Gulf of
Alaska and settle into the Pacific Northwest/northern Rockies
midweek. The core of this trough will remain centered near the
Canadian border, with a series of vorticity lobes rotating through
the mean trough position across northern Utah/western Wyoming
Wednesday night through at least early in the weekend. Sufficient
moisture, dynamic lift and cold air aloft will exist across the
northern half of the state to support precip with each of these
passing vorticity lobes.

Issued an earlier update to put a few showers in the northeast
mountains today. The remainder of the short term forecast looks
to be in good shape.


.AVIATION...Strong high pressure aloft to the west of Utah will
leave northern Utah under a stable and dry northerly flow during
the current TAF period. Light northwest winds will develop between
17z and 18z, then switch back to a light southeast winds between
04z and 05z.





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