Area Forecast Discussion
Issued by NWS Cheyenne, WY

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FXUS65 KCYS 251749
AFDCYS

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
1150 AM MDT TUE AUG 25 2015

.SHORT TERM...(TODAY THROUGH THURSDAY NIGHT)
ISSUED AT 300 AM MDT TUE AUG 25 2015

TODAY/TONIGHT...ANOTHER QUITE WARM AND NEARLY DRY DAY TODAY...THANKS
TO THE 594 DEKAMETER 500 MB RIDGE AXIS OVER WYOMING AND COLORADO.
DESPITE THE WARM MID LEVEL TEMPERATURES...LOOKS LIKE JUST ENOUGH MID
LEVEL MOISTURE TO SPARK ISOLATED AFTERNOON AND EVENING SHOWERS AND
THUNDERSTORMS NEAR THE MOUNTAINS WEST OF INTERSTATE 25.

WEDNESDAY/WEDNESDAY NIGHT...EXPECT A SIGNIFICANT INCREASE IN AREAL
COVERAGE OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS AS A
NEGATIVELY TILTED SHORTWAVE TROUGH ALOFT MOVES OVER WYOMING WITH
INCREASED LOW AND ESPECIALLY MID LEVEL MOISTURE...SPARKING
SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WEST OF INTERSTATE
25.

THURSDAY/THURSDAY NIGHT...SHORTWAVE TROUGH ALOFT WILL BE MOVING AWAY
FROM OUR REGION...THOUGH WITH ADEQUATE LOW AND MID LEVEL
MOISTURE...STILL EXPECT ISOLATED TO SCATTERED AFTERNOON AND EVENING
SHOWERS AND THUNDERSTORMS ALONG WITH COOLER TEMPERATURES DUE TO
COOLING ALOFT AND MORE CLOUD COVER.

.LONG TERM...(FRIDAY THROUGH MONDAY)
ISSUED AT 300 AM MDT TUE AUG 25 2015

STARTING OFF FRIDAY...UPPER LEVEL RIDGING BUILDING BACK INTO THE
AREA AS UPPER LEVEL LOW TRACKS INTO EASTERN NEBRASKA. GUIDANCE
SHOWING SOME SCATTERED SHOWERS AND THUNDERSTORMS OVER THE WESTERN
MOUNTAINS MAINLY FRIDAY AFTERNOON. MOST OTHER AREAS SHOULD REMAIN
DRY.

FOR SATURDAY...GFS SHOWING VERY STRONG WINDS ACROSS THE NEBRASKA
PANHANDLE FROM THE SOUTH. 850MB WINDS UP BY CHADRON AT 50KTS.
SEEMS HARD TO BELIEVE THOUGH GIVEN THE TIME OF YEAR...BUT BEARS
WATCHING. ECMWF DOES SHOW 850MB WINDS INCREASING OUT OVER THE
PANHANDLE SATURDAY AFTERNOON/EVENING.

700MB TEMPERATURES INCREASING THROUGH THE WEEKEND...RISING FROM
+12 TO +14C FRIDAY AFTERNOON TO +16 TO +17C SUNDAY. WITH CLEAR
SKIES...AFTERNOON HIGHS SHOULD CLIMB INTO THE LOW 90S OUT IN THE
PANHANDLE WITH LOW TO MID 80S ACROSS SOUTHEAST WYOMING.

MONSOON MOISTURE LOOKS TO RETURN SUNDAY NIGHT INTO MONDAY...MAINLY
FOR OUR WESTERN MOUNTAINS ONCE AGAIN. OTHER AREAS SHOULD REMAIN
DRY.

&&

.AVIATION...(FOR THE 18Z TAFS THROUGH WEDNESDAY MORNING)

VFR CONDITIONS WITH LIGHT WINDS CONTINUING THIS AFTERNOON AND INTO
TONIGHT. NO WEATHER IMPACTS TO AVIATION EXPECTED.

&&

.FIRE WEATHER...
ISSUED AT 131 AM MDT TUE AUG 25 2015

EXPECT ONE MORE DAY OF LOW RELATIVE HUMIDITIES TODAY
WEST OF INTERSTATE 25...AND FORTUNATELY WINDS WILL BE RELATIVELY
LIGHT MINIMIZING FIRE WEATHER CONCERNS. INCREASING HUMIDITIES
WEDNESDAY AND THURSDAY...THEN DECREASING AGAIN FRIDAY INTO THE
WEEKEND.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...NONE.
NE...NONE.
&&

$$

SHORT TERM...RUBIN
LONG TERM...GCC
AVIATION...TJT
FIRE WEATHER...RUBIN


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