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Area forecast discussion 
National Weather Service Birmingham Alabama 
1143 PM CST Friday Nov 20 2009 


Update...aviation discussion. 


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Discussion... 


Temperatures are a bit problematic tonight. Low dewpoints and light 
winds allowed temperatures to drop fairly quickly after sunset. But now 
the clouds are really starting to stream in ahead of the next storm 
system. Thus...temperatures may be bottoming out (or at least 
leveling off) in the west now (where the clouds have thickened up 
the most)...but there may be several more hours of cooling in the 
east. Will make some adjustments to the hourly temperature grids 
with the evening update...but I plan on leaving the low temperature 
forecast alone (unless something soon gets out of hand on the low 
side). 


Rain at the moment is only as near as New Orleans. There's a small 
chance that the southwestern counties could get something more than 
a few sprinkles (meaning...measurable rain) by 12z tomorrow 
morning. I don't think that chance is quite enough to include in the 
forecast right now though. 


/61/ 


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Aviation...06z taf discussion. 


High clouds will continue to move across the area tonight...with 
light to calm winds. With considerable cloudiness...do not expect 
widespread br/visible problems overnight. Can not rule out a few hours 
of reduced visible at anb and tcl...but with increasing clouds do not 
think it will become a problem. For now will not mention br in the 
forecast. As a surface low approaches from the west tomorrow 
morning...expect light rain showers to spread into central Alabama 
..from southwest to northeast. Activity will become more widespread 
by early evening. Rain will be light...and not expected to reduce 
visible to lower than MVFR. 


14 


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Bmx watches/warnings/advisories...none. 


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