FXUS63 KFSD 260326
AFDFSD

AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA
NATIONAL WEATHER SERVICE SIOUX FALLS SD
925 PM CST WED NOV 25 2009

.DISCUSSION...
VARIOUS CLOUD LAYERS BASICALLY TRAPPED BLO INVERSION ARND 800MB 
STREAMING SEWD OVER CWA THIS EVE...WITH SOME BREAKUP ALONG MISSOURI 
VALLEY WITH SUBSIDENCE AND MIXING WITH BRISK NWLY FLOW. UPDATED A 
FEW HOURS AGO FOR MUCH SLOWER TEMP DROP AND CLEARING FROM THE NW 
THIS EVE. EVENTUALLY RIDGING AND PARTIAL CLEARING DVLP EWD OVER CWA 
LATER TNGT...BUT ADJUSTED UP LOWS A COUPLE DEG MAINLY ERN CWA WHERE 
GRADIENT AND CLOUDS LINGER./ RYRHOLM 

&&
.AVIATION...
WIDESPREAD MVFR CIGS ALG/E OF INTERSTATE 29 WK CONTINUE TO RELAX
EWRD OVERNIGHT...WITH ADDITIONAL CIGS UPSTREAM IN THE LOWER VFR 
RANGE. CONTINUED SUBSIDENCE WL OPEN ADDITIONAL HOLES IN THE CIGS 
THRU THE NIGHT...AND EXPECT ONLY PATCHY VFR CIGS TO REMAIN AFT
08Z. OTHERWISE...WHEN CIGS BREAK WINDS WL DECOUPLE WITH LOSS OF
THE GUSTS AOA 20 KTS. /CHAPMAN

&&

.FSD WATCHES/WARNINGS/ADVISORIES...
SD...NONE.
MN...NONE.
IA...NONE.
NE...NONE.

$$