150 
FXUS65 KCYS 301954
AFDCYS

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
154 PM MDT SUN JUN 30 2002

HOT AND DRY SUMMERTIME WEATHER REGIME TO KEEP CHOKEHOLD ON REGION 
NEXT COUPLE DAYS IN STAGNANT UPPER FLOW PATTERN. NORTHERN JET STREAM 
WILL REMAIN WELL NORTH OF FORECAST AREA AS UPPER LEVEL DOME OF HIGH 
PRESSURE STAYS PLANTED OVER 4 CORNERS REGION. CURRENTLY...MORE SMOKE 
THAN CLOUDS OVER FORECAST AREA AS WEAK FROPA EARLIER TODAY USHERED 
IN SMOKE FROM FIRES IN LARAMIE RANGE. NIL POPS THIS EVENING WITH DRY 
AIRMASS AND NO DYNAMICS. ALL MODELS PROG AIRMASS TO REMAIN DRY OVER 
REGION MON THUS NIL POPS AGAIN. TEMPERATURES MON WILL AGAIN BE WELL 
ABOVE NORMAL...90S TO LOWER 100S IN MOST LOWER ELEVATIONS...WITH 80S 
IN MOUNTAINS AND LAR/RWL AREAS. A WEAK SURFACE COOL FRONT WILL PUSH 
THROUGH THE REGION MON PM BUT NO PRECIPITATION EXPECTED WITH FROPA. 
TEMPS TUE TO BE LESS HOT THAN MON WITH MOST LOCATIONS TUE IN THE 80S 
TO MID 90S...WITH MAINLY 70S MOUNTAINS. AVN SEEMS TO OVERDO MOISTURE 
AND POPS TUE AND PREFER DRIER ETA/NGM SOLUTION. WEAK COOL FRONT TO 
STALL TUE NIGHT THEN RETURN NORTHEAST AS A WARM FRONT WED...WITH 
TEMPS WED WARMING A BIT OVER THOSE EXPECTED TUE. MORE MODERATE TEMPS 
IN STORE FOR WED. ALTHOUGH LOW LEVEL UPSLOPE MAY RESULT IN SOMEWHAT 
MORE CLOUD COVER WED...AVN AGAIN SEEMS TO OVERDO MOISTURE/POPS WED. 
WITH WARM FRONTAL PASSAGE...TYPICALLY NO PRECIPITATION IS GENERATED 
THUS WILL AGAIN GO WITH NIL POPS WED.

IN THE EXTENDED...MONSOONAL FLOW DEVELOPS AS MSTR IS DRAWN NORTHWARD 
IN BROAD S/SW UPR FLOW BETWEEN UPR TROF OVR THE PACIFIC NORTHWEST 
AND UPR HIGH OVR THE SRN PLAINS. SVRL S/WV FEATURES EMBEDDED WITHIN 
MOIST FLOW MOVE ACRS THE FA FRI THRU SUN. PAC FRONT THRU THE AREA 
FRI...WITH LOW LVL UPSLOPE FLOW DVLPG AFT FROPA AND CONTG THRU THE 
WEEKEND. BREAK IN THE HEAT FRI THRU SUN...AS H5 HGTS FALL AND H7 
TEMPS COOL IN RESPONSE TO TROF OVR THE PAC NW.

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