Hazardous Weather Outlook
Issued by NWS Salt Lake City, UT

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FLUS45 KSLC 181243
HWOSLC

Hazardous Weather Outlook
National Weather Service Salt Lake City UT
543 AM MST Sat Feb 18 2017

UTZ001>016-019>021-517-518-WYZ021-191300-
Cache Valley/Utah Portion-Northern Wasatch Front-
Salt Lake and Tooele Valleys-Southern Wasatch Front-
Great Salt Lake Desert and Mountains-Wasatch Mountain Valleys-
Wasatch Mountains I-80 North-Wasatch Mountains South of I-80-
Western Uinta Mountains-Wasatch Plateau/Book Cliffs-
Western Uinta Basin-Castle Country-San Rafael Swell-
Sanpete/Sevier Valleys-West Central Utah-Southwest Utah-
Utahs Dixie and Zion National Park-South Central Utah-
Glen Canyon Recreation Area/Lake Powell-Central Mountains-
Southern Mountains-Southwest Wyoming-
543 AM MST Sat Feb 18 2017

This Hazardous Weather Outlook is for the western two thirds of
Utah and southwest Wyoming.

.DAY ONE...Today and Tonight

Steady light to locally moderate rain will exist across extreme
southern Utah through tonight. This persist rain below roughly
7000 feet will generate flows through some of the slot canyons and
normally dry washes in and around Zion National Park and portions
of western through central Kane county.

Across the remainder of the outlook area scattered valley rain
and mountain snow showers will exist through this evening. A
weather disturbance advancing rapidly from the west will increase
the areal coverage of precipitation across northern Utah late
tonight.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

For Sunday, precipitation will become more widespread and heavier
over the northern half of the outlook area as the upper level
trough moves east through the region. Significant snow
accumulations will be possible in the northern and central
mountains through Sunday evening. Adjacent valley locations will
see rain, with a few areas developing a rain and snow mix late
Sunday or Sunday evening.

Across extreme southern through east-central Utah a period of
light to moderate valley rain will create areas of flowing water
through the dry washes and slot canyons Sunday morning through
early afternoon.

High pressure aloft will move west to east across the Great Basin
Monday. Trialing this high pressure will be the next Pacific storm
system scheduled to arrive midweek. Ahead of this storm period of
showers will form along a stalled front across northwest Utah
through southwest Wyoming Tuesday through early Wednesday.

The storm moving into the Great Basin midweek will bring very cold
air to the outlook area for the latter half of the week. The
potential will exist for a significant winter storm for much of
the outlook area late Wednesday through Thursday. Cold temperatures
will remain behind the storm heading into Friday.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

$$

For more information from NOAA/s National Weather Service visit...
http://weather.gov/saltlakecity

For information on potential road travel impacts visit...
http://www.udottraffic.utah.gov/roadweatherforecast.aspx



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