Weather Service Report


441 
FXUS65 KSLC 270359
AFDSLC

Area Forecast Discussion
National Weather Service Salt Lake City UT
959 PM MDT Wed Apr 26 2017

.SYNOPSIS...A series of progressively colder systems will cross
the region through Saturday, with high pressure returning late in
the weekend. 

&&

.DISCUSSION...A moist, slightly cyclonic northwesterly flow aloft 
has spread into the forecast area this evening with a strong jet 
punching into the Great Basin. The shortwave disturbance associated 
with the leading edge of this jet has pushed a shallow cold front 
into western Utah, although a stronger push associated with the 
700mb baroclinic zone remains upstream and is expected to shift into 
Utah after midnight. Northwest winds should increase later tonight 
into tomorrow morning with some gusty downslope winds in favored 
areas such as northwest Utah and the eastern valleys.

Steadier rain associated with earlier warm advection is winding 
down, although shower activity continues to develop in the cold 
sector and will impact Utah through the rest of the evening, then 
precipitation will become increasingly confined to the mountains and 
upslope regions after midnight. Snow levels have begun to fall and 
should reach 5000-6000 feet across the north and 6500-7500 feet 
across the south before 12z. Although showers will become more 
spotty later tonight, there will be a potential for some enhancement 
off the Great Salt Lake.

Precipitation will decrease tomorrow but is not expected to 
completely end as a moist northwest flow remains in place. 

Updated the forecast to make minor updates several parameters but 
mainly lowered snow levels a bit for the rest of the evening.

&&

.AVIATION...Intermittent showers will continue tonight at the SLC 
terminal, with CIGS falling below 7000ft near showers. There will be 
a 30 percent chance of temporary MVFR conditions under the heavier 
showers. Otherwise, northwesterly winds are expected to become 
established after midnight.

&&

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

$$

Cheng

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