093 
fxus65 kslc 190338 
afdslc 


Area forecast discussion 
National Weather Service Salt Lake City Utah 
938 PM MDT Thursday Mar 18 2010 


Synopsis...a cold front will move southeast across Utah 
overnight. Cooler air will spread into the region behind the 
front for Friday. High pressure with a warming trend will prevail 
for the weekend. 


&& 


Discussion...surface observation and pressure analysis show cold front 
extends approximately from St George to Hanksville moving 
southeast. Active convection along the front has developed into a 
larger area of precipitation across southwest Utah with a small circulation 
center evident in radar imagery just south of Cedar City. 


Convection is still active along the front across southeastern Utah per 
thunder reported at Hanksville and this should persist for several 
more hours. 


The heavier precipitation should also dissipate within about the next 
hour as the circulation center breaks up. 


Light precipitation across the northern County Warning Area has ended and it should remain dry 
there the rest of tonight. 


Strong winds have develop across the downslope areas in Washington 
County and should persist through much of the night as the tightest 
surface gradient crosses that area. Current advisory on track and 
will monitor for possible upgrade to warning. 


The upper cold pool is still forecast to slide past just east of 
the Wasatch front on Friday with local instability snow showers over 
the Wasatch mountains and nearby valleys. The uintas and portions of eastern 
Utah are under the coldest air and should see more widespread 
showers...heavy enough in the uintas to generate advisory level 
accumulation. 


A strong drying and warming trend is still forecast for the 
weekend with the next trough starting to spread clouds back into the 
area Sun night or early Monday. 


Updated forecast earlier to beef up probability of precipitation and quantitative precipitation forecast across the 
southwest and to add mention of thunder. Lowered probability of precipitation and sky 
cover across the north. Made no changes to forecasts after 
tonight. 


&& 


Aviation...northwest winds will persist at kslc terminal through 
the overnight hours. There is a 10 percent chance of a weak 
southeast drainage wind at kslc between 10 and 14z. Otherwise...VFR 
conditions expected at kslc through 18z Friday. 


&& 


Slc watches/warnings/advisories... 
Utah...Wind Advisory until 10 am MDT Friday for the canyons of 
Washington County in utz019-518. 


Winter Weather Advisory until midnight MDT Friday night for 
utz009. 


Wyoming...none. 
&& 


$$ 


Wilensky/Myrick 


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 
visit... 
http://weather.Gov/saltlakecity/general/afd_faqs.Php (all lower case)