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Area forecast discussion
National Weather Service Salt Lake City Utah
959 PM MDT Wednesday Apr 16 2014
Synopsis...high pressure will spread across the region tonight
through tomorrow. The next weakening storm system will cross the
region late Friday through Saturday.
Discussion...the upstream ridge axis is along the West Coast this
evening and will be shifting into the Great Basin later tonight then
across Utah tomorrow. Subsidence ahead of this ridge has cleared
skies across the County Warning Area and expect only dissipating cirrus streaming
through the ridge over the County Warning Area the rest of the night. The chilly
airmass in place and mostly clear skies will allow temperatures to dip
to cool readings overnight.
Strong airmass warming will accompany the advancing ridge and
highs tomorrow should warm 10-15 degrees from today under mostly
sunny skies and local south winds by afternoon.
The next trough is still forecast to split as it moves inland with
the southern closed low now forming southwest of San Diego California by Friday
morning. This feature does lift into northern Arizona by Sat morning and
pushes a weak front up from the south into southern Utah Friday night.
The northern branch sends a weak cold front into northern Utah on Friday with
increasing instability across the County Warning Area in between these features on
Friday. The best chance for precipitation appears to be Friday night with
instability and moisture keeping some convection lingering Sat but
temperatures warming back up.
Ridging brings additional warming and drying for sun and the next
fairly large deep Pacific trough sets up a southwesterly flow on Monday that
increases and could become fairly strong Tuesday as this trough edges
Updated forecasts to reduce sky cover across the County Warning Area and remove
evening probability of precipitation from the southern mountains bumped winds up a bit in Dixie as a
northeasterly gradient should keep it locally breezy most of the rest of
the night. No additional updates planned.
Aviation...winds at the slc terminal will become southerly by 05z
and remain southerly into Thursday afternoon. VFR conditions will
prevail under mostly clear skies.
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)