500 
FXUS65 KCYS 091600
AFDCYS

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
1001 AM MDT TUE OCT 9 2001

SEVERAL SHORTWAVE TROUGHS WILL AFFECT THE CWA THROUGH AT LEAST EARLY
TONIGHT.  INITIAL FEATURE WAS MOVING INTO EASTERN WYOMING AT MID
MORNING AND WAS PRODUCING AN AREA OF SHOWERS MAINLY EXTENDING FROM LUSK
TO CHEYENNE.  THE BACK EDGE OF THE PRECIPITATION HAS MOVED EAST SINCE
SUNRISE AND WAS LOCATED FROM DOUGLAS TO JUST WEST OF CHEYENNE AT 15Z.
MOST OF THIS PRECIPITATION WILL CONTINUE TO BE IN THE FORM OF RAIN AND
WILL BE MAINLY IN THE NEBRASKA PANHANDLE THROUGH THE AFTERNOON.  THE
NEXT SHORTWAVE TROUGH WAS MOVING INTO WESTERN COLORADO AT MID MORNING
AND WILL MOVE ACROSS NORTHERN COLORADO THROUGH TONIGHT.  THAT FEATURE
ALONG WITH AN APPARENT SURGE OF SURFACE COLD AIR WILL PRODUCE MORE
RAIN SPREADING FROM WEST TO EAST IN THE AFTERNOON AND THEN CHANGE OVER
TO SNOW AT LEAST IN THE WYOMING PART OF THE CWA.  SHOULD BE ENOUGH 
LIFT AND INSTABILITY FOR A FEW THUNDERSTORMS IN SOUTHEAST WYOMING 
AND THE SOUTHERN PANHANDLE THIS AFTERNOON AND WILL ADD TO THE 
FORECAST.  OTHERWISE...WILL ONLY MAKE MINOR CHANGES TO THE CURRENT
FORECAST.

.CYS...
WY...NONE.
NE...NONE.

WEILAND