Weather

381 
fxus65 kslc 280224 
afdslc 


Area forecast discussion 
National Weather Service Salt Lake City Utah 
824 PM MDT Wednesday Aug 27 2008 


Synopsis...a generally dry northwest flow aloft will reside 
across the region through the remainder of the week. Moisture is 
expected to return northward during the upcoming weekend. 


&& 


Discussion...cold front has moved south of the state this evening 
effectively shutting off any chance for convection. Will update 
forecast to remove any mention of thunderstorms this evening. A 
dry and stable airmass will remain in place through the County 
Warning Area through Friday. A cool northwesterly flow will 
continue over the area and keep temperatures near to slightly 
below normal tomorrow over northern Utah before the airmass warms 
for Friday and Saturday. Next reasonable chance for precipitation 
will be Sunday as an upstream system moves onto the Pacific 
northwest coast. This system will push a short wave across Utah 
which will increase the southwest flow across the state. This will 
pull a decent surge of moisture from Arizona into all of the state. 


&& 


Aviation...VFR conditions will prevail at the slc terminal through 
the evening under mostly clear skies. Northwest winds are expected 
to shift to the southeast between 03z and 04z. 


&& 


Fire weather...drier and cooler air has settled into the state 
behind a cold front which has moved out of Utah. North to northwest 
winds will diminish this evening statewide. Flat upper level ridge 
will build over the Great Basin over the next few days keeping the 
dry airmass in place. Afternoon minimum relative humidities will 
approach critical levels in some locations tomorrow and Friday but 
with weakening flow aloft winds will not be strong enough to be a 
major concern. Upper level trough will then move onto the West 
Coast this weekend. This will allow deep moisture to return north 
into the state. This will result in increasing relative humidities 
over the weekend as well as increasing chance of precipitation on 
Saturday and Sunday. This system is expected to push a strong cold 
front into the Great Basin late in the weekend and gusty south 
winds are expected across Utah ahead of this front. 


&& 


Slc watches/warnings/advisories... 
Utah...none. 
Wyoming...none. 


&& 


$$ 


Public/fire weather...Young 
aviation..............traphagan 


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