Weather

683 
fxus63 kfsd 070833 
afdfsd 


Area forecast discussion for southeast South Dakota/southwest Minnesota/northwest Iowa 
National Weather Service Sioux Falls South Dakota 
330 am CDT sun Sep 7 2008 


Discussion... 
weak short wave generating scattered rain shower- mainly north of i90 and east of James River Erly 
this morning. This should push eastward across eastern County Warning Area Erly this morning and should 
be out of area by 14 or 15z. Areas of fog ahead of this feature across 
SW Minnesota and northwest Iowa should also dissipate Erly this morning with passage of 
short wave. Should see a little sun today before more clouds roll in from the west 
during the afternoon. 


Fairly strong short wave will push eastward across the plains tonight and Monday with strong 
middle level fntrgen along and S of i90. Should see a widespread area of rain 
develop tonight along and S of i90 and spread eastward later tonight into 
Monday. Will go with high probability of precipitation S of a 9v9-fsd-mwm line espec for later 
tonight into Monday morning. Precipitation may have a sharp cutoff further 
north...but hard to pinpoint exactly where...so will keep a small pop across 
the far north tonight into Monday. System should pull away Monday afternoon and will end 
rain from west to east on Monday. Widespread clouds and rain will keep temperatures quite 
cool on Monday...and may not reach 60 across southeastern County Warning Area. Even with some sun 
in the afternoon farther west and northwest...still will not get out of 60s. Pbly will 
see a good soaking rain of at least 1/2 inch S of i90 tonight through 
Monday morning. Surface high will slide southeastward into County Warning Area Monday night and should bring 
some clearing. With light winds and moist ground...will likely see some 
areas of fog late Monday night and Tuesday morning...so did mention in forecast 
eastern County Warning Area. 


Warmup begins Tuesday but did cool temperatures a few degree eastern County Warning Area as low level 
flow will be southeasterly from rain cooled airmass. Better warmup on Wednesday ahead 
of short wave and cold front. Models a little slower on this feature and best chance 
for thunderstorm may hold off until Wednesday night into Thursday morning. So will trim probability of precipitation 
back slightly during the day on Wednesday. 


Later periods will remain unchanged although GFS hinting at a wet Friday night 
and Sat. 




&& 


Aviation... 


Isolated to scattered showers will be possible around the kfsd and 
ksux taf sites before 14z...otherwise VFR conditions expected 
through the day. 




&& 


Fsd watches/warnings/advisories... 
South Dakota...none. 
Minnesota...none 
Iowa...none. 
NE...none. 


&& 


$$