044 
FXUS63 KUNR 111932
AFDRAP

AREA FORECAST DISCUSSION FOR WESTERN SD AND NORTHEASTERN WY
NATIONAL WEATHER SERVICE RAPID CITY SD
200 PM MDT SAT SEP 11 1999

SOMEWHAT TRICKY FORECAST TODAY WITH MANY MAYBES. FISRT...WITH SECOND 
PUSH OF CD AIR MOVING ACROSS THE FA THIS EVENING...WINDS SHOULD BE 
QUITE STRONG THIS EVE IN THE FOOTHILLS AND ALL NIGHT ON THE NW AND 
WNCTRL PLAINS...WHERE 30 TO 40 KT WNDS IN THE H8 TO H7 RANGE 
AVAILABLE IN ISENT DOWNGLIDE. WITH MAIN WIND AXIS FURTHER E LATE 
TONIGHT AND SUNDAY...OPTED TO KEEP HILITES CONFINED TO PLAINS ONLY. 
THIS MAY BE A SLIGHT GAMBLE ESP IN THE CNTRL FOOTHILLS WHERE HILLS 
COULD ACCELERATE FLOW SOMEHWAT. AS STRONG DYNAMICS MOVE FROM WY TO 
WRN SD TONIGHT...EXPECTE WK SHOWERS OVR THE NRN 2/3S OF THE CWA WITH 
A TSTORM OR 2 POSSIBLE IN THE S. ATM IS COOL ENOUGH FOR SN ABOVE 5K 
FT IN BLK HLS...SO WORDED THAT WAY. FINALLY...AS SFC HIGH BLDS IN 
SUN NIGHT...SOME LOW LYING AREAS MAY SEE FIRST FROST OF SEASON WITH 
LOW TEMPS FCST IN THE M30S. ISSUED SPS TO HILITE THE POTENTIAL. 

IN EXTENDED...MDLS IN GENERAL AGREEMENT WITH SLOW MOVEMENT OF LOW TO 
E AND SUBSEQUENT RIDGING. THEREFORE TEMPS WILL WARM GRADUALLY AND 
FCST WILL BE DRY.

.UNR...WND ADVY NW AND WC SD PLAINS TONIGHT AND SUNDAY. 
       WND ADVY NRN AND CNTRL FOOTHILLS THIS EVENING

BAILEY