Area Forecast Discussion
Issued by NWS Salt Lake City, UT

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FXUS65 KSLC 191630

Area Forecast Discussion
National Weather Service Salt Lake City UT
930 AM MST Sun Feb 19 2017

.SYNOPSIS...An elongated upper level trough will continue east across
the eastern Great Basin today. High pressure aloft will develop
over Utah Monday, with a mild southwest flow aloft Tuesday. A
potentially strong winter storm could impact the region beginning


.DISCUSSION...A split trough continues to cross the Great Basin and
desert southwest this morning. The southern branch low is currently
lifting northeast across Arizona and opening up as it starts to get
absorbed into a trough crossing the Pacific Northwest states. This
will create one elongated trough which will continue through eastern
Utah and into the Rockies today.

The heaviest precipitation has shifted across eastern Utah at this
time as the 700mb trough axis crosses Utah, so overall expect a
general downward trend in precipitation from west to east for the
rest of the day. However, temperatures will continue to fall a bit
at 500mb, creating weak instability which will help fire up some
showers along/near the higher terrain through this afternoon.

Snow levels appear to be near 7000ft currently and is not expected
to fall much lower than around 6000ft. Mountains will continue to
see additional accumulations, but these are not expected to be too
significant in the showers behind the main precip band that is
currently across eastern Utah. Will let the current Winter Weather
Advisory for the northern Wasatch continue for the rest of the


.Aviation...Winds at the SLC terminal are expected to turn to the
northwest around 18-20Z, with a slight chance that southerlies
persist through 21Z. Showers will likely continue across northern
Utah through 00Z, and any showers that pass over the terminal will
drop ceilings below 7000 feet. There is a 20 percent chance of MVFR
conditions due to rain showers between 17Z and 22Z.


UT...Winter Weather Advisory until 4 PM MST this afternoon for




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