Weather Service Report


693 
FXUS65 KSLC 191630
AFDSLC

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
midweek. 

&&

.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 
afternoon. 

&&

.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.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...Winter Weather Advisory until 4 PM MST this afternoon for 
UTZ007.

WY...None.
&&

$$

Cheng/Schoening

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Western Regional Climate Center, wrcc@dri.edu