021 
fxus65 kcys 051951 
afdcys 


Area forecast discussion 
National Weather Service Cheyenne Wyoming 
151 PM MDT Sat Jul 5 2008 


Short term...tonight through Monday... 
latest surface analysis showing cold front pushing southeast 
through the County Warning Area. Temperatures well into the 90s ahead of the front 
but 70s in northern Wyoming. A couple of storms have developed in 
the southern Panhandle and this trend is expected to continue into 
the evening. Front will be completely through the area by morning 
with upslope flow behind the front. Time heights showing some 
areas in the Panhandle could see some low cloud ceilings Sunday 
morning. Sunday and Monday should be some 10 to 15 degrees cooler 
than today. Though not expected to be widespread...isolated 
convection possible both Sunday and Monday. 


Long term...Monday night through Saturday... 
somewhat drier northwest flow to begin the period. At the 
surface...a weak secondary boundary will back into the County Warning Area on 
Tuesday morning. This will reinforce upslope flow east of the 
Laramie range...and thus precipitation chances for the mountains and 
adjacent windward foothills on Tuesday afternoon/early evening. 
Falling surface pressure to the north...will allow flow to swing 
around to the south-southeast Tuesday night and Wednesday morning. Return flow 
will advect moisture back into the Lee of the mountains on 
Wednesday...so afternoon/evening convection still a possibility... 
particularly in the southeast Wyoming. Have maintained the mostly dry 
forecast for Thursday and Friday. However...recirculated moisture 
will swing back around the developing Gulf Coast high for areas 
west of the Laramie range late Friday and during the day on 
Saturday. Even then...would only expect isolated convection at 
best. Decreased afternoon high temperatures further on Tuesday 
behind said secondary frontal boundary that moves through Tuesday 
morning. The respite will be short lived however...as temperatures 
rebound to normal on Wednesday...and back into a surplus for 
Thursday through Friday. 


&& 


Aviation...VFR conditions expected through 6/09z. Widely 
scattered showers and thunderstorms through this evening. Chance 
of MVFR conditions after 6/12z kbff and ksny. 




&& 


Cys watches/warnings/advisories... 
Wyoming...none. 
NE...none. 


&& 


$$ 


Short term/aviation...Griffith 
long term....Hahn