Issued by NWS Cheyenne, WY
000 FXUS65 KCYS 140850 AFDCYS AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHEYENNE WY 250 AM MDT TUE OCT 14 2008 .SHORT TERM...TODAY THROUGH WEDNESDAY NIGHT... COOLER THAN NORMAL CONDITIONS CONTINUE TO BE A SURE BET FOR TODAY AND WEDNESDAY...AS NORMAL HIGHS ACROSS THE AREA RANGE FROM THE UPPER 50S IN THE LARAMIE VALLEY TO THE MID 60S ACROSS THE NEBRASKA PANHANDLE. THE AREA WILL OBSERVE HIGH TEMPERATURES AROUND 5 TO 10 DEGREES BELOW NORMAL TODAY...AND AROUND 5 DEGREES BELOW NORMAL WEDNESDAY. NO PRECIPITATION IS EXPECTED ACROSS THE AREA THROUGH WEDNESDAY NIGHT. THE LINGERING ENERGY IN THE BASE OF THE EXITING UPPER LEVEL TROUGH WILL CONTINUE TO MOVE EAST OF THE AREA TODAY. THE ONLY AFFECT FOR THE FORECAST AREA WILL BE A WEAK COLD FRONT MOVING THROUGH LATE THIS AFTERNOON OR EARLY THIS EVENING. NEARLY ZONAL FLOW ALOFT WILL DEVELOP AFTER THE TROUGH COMPLETELY MOVES EAST TOWARD THE MISSISSIPPI RIVER VALLEY WEDNESDAY. AT THE SAME TIME A WEAK SHORT- WAVE TROUGH WILL MOVE EAST ACROSS MONTANA...BUT THIS APPEARS TO NOT PRODUCE ANY SENSIBLE WEATHER ACROSS SOUTHEAST WYOMING OR THE WESTERN NEBRASKA PANHANDLE. .LONG TERM...THURSDAY THROUGH MONDAY DRY WEATHER WILL PERSIST FOR MOST OF THE EXTENDED PERIOD. NW FLOW WILL OCCUR ACROSS THE AREA THUR AS AN UPPER RIDGE MOVES INTO THE WESTERN U.S. THE UPPER RIDGE WILL MOVE OVER THE CWA FRIDAY...WITH THE AXIS OVER THE WESTERN PORTION OF THE CWA. A SURFACE LEE TROUGH WILL SET UP BY EVENING...RESULTING IN BREEZY DOWNSLOPE WINDS. ZONAL FLOW WILL DEVELOP ALOFT SAT AND CONTINUE SUN...AS A SERIES OF SHORTWAVES MOVING ACROSS SOUTHERN CANADA FLATTENS THE RIDGE. A FEW WEAK DISTURBANCES WILL MOVE ACROSS THE FORECAST AREA ON SUN...BUT AT THIS POINT ONLY AN INCREASE IN CLOUDS IS EXPECTED. ON MON...THE UPPER FLOW WILL BECOME SW AS AN UPPER TROUGH MOVES INTO THE WESTERN U.S. AN INCREASE IN MID LEVEL MOISTURE WILL OCCUR AT THIS TIME...BUT DOWN SLOPE WINDS AT THE SURFACE SHOULD LIMIT ANY CHANCE OF PRECIPITATION ACROSS THE AREA. HIGH TEMPERATURES WILL BE FROM 5 TO 10 DEGREES ABOVE NORMAL FROM THUR THROUGH SUN...AND AROUND NORMAL ON MON. && .AVIATION... NO RESTRICTIVE CONDITIONS ARE EXPECTED TODAY OR TONIGHT ACROSS SOUTHEAST WYOMING AND THE NEBRASKA PANHANDLE. && .CYS WATCHES/WARNINGS/ADVISORIES... WY...NONE. NE...NONE. && $$ SHORT TERM/AVIATION...CARPENTER LONG TERM...KMD
