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Area forecast discussion 
National Weather Service Flagstaff Arizona 
230 am MST sun Mar 21 2010 


Synopsis...high pressure will build over the southwest through 
Monday with warmer daytime temperatures...light winds and generally 
clear skies. Another weather system will bring cooler temperatures 
and a chance of rain and snow showers on Tuesday and Wednesday. 


&& 


Discussion...high pressure in the middle to upper levels will move 
across Arizona today. Weak pressure gradients will result in 
generally light winds and warmer air aloft will bring a 5 to 10 
degree warm-up of high temperatures. On Monday...the high will head 
to the east as low pressure begins to take shape over the western 
United States. The main impact will be increasing pressure gradients 
with gusty west to southwest winds of 10 to 25 miles per hour developing by 
Monday afternoon. Otherwise...high temperatures will remain above 
normal and conditions will remain dry under increasing high clouds. 


For Tuesday and Wednesday...models drop another weak storm across 
Arizona from the north. The main impact appears to be a cool down to 
below normal temperatures along with a chance of mountain snow and 
valley rain showers. It still appears that any precipitation will be 
on the light side. 


For Thursday into next weekend...high pressure will continue to 
dominate the weather with only a weak disturbance or two to kick-up 
daytime breezes. 


&& 


Aviation...for the 12z package...expect VFR conditions for the next 
24 hours with sky clear-sct250 skies. Aviation discussion not updated for 
amendments. 


&& 


Fgz watches/warnings/advisories...none. 


&& 


$$ 


Public..................McCollum 
aviation................Clark 


Visit weather.Gov/Flagstaff for northern Arizona weather 
information.