Scientific Forecaster Discussion
Area forecast discussion
National Weather Service Salt Lake City Utah
915 PM MDT Tuesday Oct 6 2015
Synopsis...a moist upper low will drift southeast away from Utah
tonight through Wednesday. High pressure aloft will build into the
area in the wake of this low and persist through the latter
portion of the week.
Discussion...the closed low is over west central Arizona this evening and is
drifting southward as high pressure starts to nose into the northern Great
Basin. This has pulled all the dynamic support for precipitation out of
our County Warning Area and showers have pretty much ended. Cancelled the Flash
Flood Watch earlier as the threat of any significant rainfall had
A few light showers could persist through about midnight across the
northern Wasatch mountains and southwestern Wyoming as well as over southern Utah but thats
The upstream ridge builds over the western Great Basin through Friday
keeping a stable mostly dry northerly flow over the County Warning Area. A weak
short wave crossing the northern rockies just clips northestern Utah on Thursday but
the net result will be just an increase in clouds.
The airmass warms through Friday and even more so Sat as the upper ridge
axis shifts east of the area.
Updated earlier to remove Flash Flood Watch headline then again to
reduce probability of precipitation area wide for the rest of the night and sky cover over
the west. No additional updates planned.
Aviation...winds at the slc terminal will shift to southeasterly
around 04z and persist overnight.
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)