Scientific Forecaster Discussion
Area forecast discussion
National Weather Service Salt Lake City Utah
956 PM MDT Friday Aug 22 2014
Synopsis...a cold trough will impact northern and central Utah
tonight and Saturday. Another trough will impact the area early
next week before high pressure returns for the latter part of the
Discussion...a cool upper trough is centered over west central Idaho
this evening. The associated cold front extends from about price to
Milford and continues driving southeastward. A broad swath of convective
precipitation accompanies the cold front and has cleared the northern and
central Wasatch front but will persist in Utah Colorado a little while
longer. Additional showers over northwestern Utah associated with the
advancing cold pool aloft should continue to propagate east and
fill back in across the northern and central Wasatch front later
Expect the showers at the southern end of the cold front to weaken
over the next several hours as it moves farther away from the
upper support while the portion crossing central and northestern Utah
should hold together.
The upper trough axis crosses northern Utah around midday and expect
precipitation to shut down rapidly along and right behind this axis with
skies clearing out in the afternoon across the north and west.
A mostly clear night should allow temperatures to dip to chilly levels
Sun morning although they will remain well above freezing in the
Some convection is possible across central Utah sun as the remains
of the cold front start to lift back north as a weak warm front
ahead of the next short wave that deepens the upper trough again to
Updated earlier to make some short term adjustments to probability of precipitation sky
and wind. No additional updates planned.
Aviation...a break in the showers at the kslc terminal will last
through about 06z tonight with occasional passing showers after
that. Winds have returned to southeasterly and should remain that
way into the morning. However gusty erratic winds are possible
with showers. VFR conditions will prevail but brief MVFR
conditions are possible if a shower passes directly overhead.
For more information from National oceanic and atmospheric administration/S National Weather Service visit...
http://weather.Gov/saltlakecity (all lower case)
For frequently asked questions about the area forecast discussion
http://weather.Gov/saltlakecity/general/afd_faqs.Php (all lower case)