770 
fxus63 kdvn 211635 
afddvn 


Area forecast discussion 
National Weather Service quadrant cities Iowa Illinois 
1035 am CST Sat Nov 21 2009 


Update... 
fog has finally dissipated...with visibilities above a quarter 
mile at all but a few locations. Thus...allowed fog advisory to 
expire back at 10 am. The stratus deck with ceilings around 25hft over 
mainly the Iowa counties is going to be tougher. Looking at this 
mornings sounding...it is going to take getting above the middle 40s 
with some mixing and winds to get rid of that stratus 
deck...though it does help that the 925mb flow slowly strengthens 
through the day...and this should help to at least bodily shove 
the stratus deck to the north. The next cloud deck of concern this 
morning is the slightly higher stratus oozing north out of 
Missouri. For this deck have relied a little more on the 
models...which slowly bring it into our south this 
afternoon...which is supported by a distance time tracking on the 
satellite imagery. 


&& 


Aviation... 
025hft stratus deck expected to begin to lift and thin through the 
early afternoon hours...and may dissipate completely by 20-21z. 
Will watch trends carefully to see if we are getting much mixing 
to be able to dissipate these clouds. 


&& 


Dvn watches/warnings/advisories... 
Iowa...none. 
Illinois...none. 
MO...none. 
&& 


$$ 


Le