Scientific Forecaster Discussion
Area forecast discussion
National Weather Service Salt Lake City Utah
1053 am MST Friday Dec 6 2013
Synopsis...a very cold upper level trough will remain over the
area through weekend. The next cold storm system to rotate
through the trough will impact the area Saturday into Sunday.
Discussion...the large cold upper trough remains in place across
the central and western US this morning. A well defined short wave
is dropping through the pacnw and weak warm advection is keeping
clouds and a little light snow over the northern County Warning Area. The lake effect
snow from earlier today has abated but expect some light snow
showers to form over the northern and central mountains as the day
Morning models stayed the course with the pacnw short wave deepening
it tonight and sweeping it across the Great Basin Sat through early
sun. This should still generate widespread precipitation for our County Warning Area that
will fall everywhere as snow. Current Winter Storm Watch looks on
track and will likely be upgrading this to a warning this afternoon.
Precipitation should wind down fairly rapidly sun although it could linger in
northwest flow favored areas into the afternoon. New 12z GFS is a little
better defined again with the weak upstream short wave for Sun night
and keeps a threat of light snow going over the northwestern County Warning Area.
Updated forecasts earlier to lower probability of precipitation for the rest of today
outside of the far north and adjusted sky cover somewhat. No
additional updates planned at this time.
Aviation...surface winds at the slc terminal are expected to
remain southerly through the afternoon...though there is a 30
percent chance that there will be a switch to the northwest
between 20-22z. Any northerlies that do develop will likely remain
at 6 knots or below. Ceilings at the terminal should remain above
6000 feet above ground level until this evening.
Utah...Winter Storm Watch from Saturday morning through Sunday
afternoon for utz001>016-019>021-517-518.
Wyoming...Winter Storm Watch from Saturday morning through Sunday
afternoon for wyz021.
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)