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fxus63 klsx 072028 
afdlsx 


Area forecast discussion 
National Weather Service St Louis MO 
328 PM CDT Thursday Aug 7 2008 


Discussion... 
/327 PM CDT Thursday Aug 7 2008/ 
will see ridge of high pressure build in and remain over region 
through most of the weekend...with pleasant weather in store for 
this time of year. However...radar showing some isolated cells 
developing over forecast area as of 20z as a weak disturbance moves 
through. So will update afternoon and early evening grids to account 
for them. 


Otherwise...for rest of tonight...will see clearing skies with 
dewpoints dipping into the upper 50s by daybreak. So with clear 
skies and light winds...low temperatures will be in the lower 60s. 


On Friday and Saturday...expect sunny skies with highs only in the 
low to middle 80s and lows in the 60s. 


Ridge will begin to move off to our southeast by Sunday with models 
generating an mesoscale convective system. Feel that GFS has a better handle on it with mesoscale convective system 
tracking from western Kansas southeastward into Arkansas...while NAM 
is way too far north in its placement/development and has overdone 
its quantitative precipitation forecast values. So will side with the GFS...with just slight chance 
probability of precipitation over County Warning Area Sunday and Sunday night. Will see better chances of 
storms as main system moves closer to forecast area...so raised probability of precipitation 
to chance catagory for Monday through Tuesday...before tapering off 
Tuesday night. As for rest extended...will see dry weather. 


Byrd 
&& 


Aviation... 
/1110 am CDT Thursday Aug 7 2008/ 
for the 18z tafs... 
high pressure will continue to build into the region during the 
period with northerly surface winds. VFR weather will continue through 
18z Friday except at ksus late tonight where fog reducing the 
visibility to around 3 miles is possible. 


Tps 
&& 


Lsx watches/warnings/advisories... 
MO...none. 
Illinois...none. 
&& 


$$ 
Weather forecast office lsx