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000
FXUS65 KCYS 100735
AFDCYS

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
1235 AM MST TUE DEC 10 2013

.UPDATE...
ISSUED AT 1220 AM MST TUE DEC 10 2013

ADDED THE CENTRAL LARAMIE COUNTY ZONE INCLUDING THE CITY OF
CHEYENNE TO THE HIGH WIND WARNING. HAVE BEEN CONSISTENTLY GETTING
GUSTS IN THE 45-48 KT RANGE OVER THE PAST HOUR AT KCYS AND LLVL
GRADIENTS DO NOT APPEAR TO CHANGE MUCH THROUGH THE MORNING.
RUC SOUNDINGS EVEN SHOW WINDS INCREASING ANOTHER 10 KTS
JUST OFF THE SFC THROUGH SUNRISE.

&&

.SHORT TERM...(THIS EVENING THROUGH WEDNESDAY NIGHT)
ISSUED AT 405 PM MST MON DEC 9 2013

DESPITE VERY STRONG WINDS CONTINUING ACROSS THE WIND PRONE AREAS
OF SOUTHEAST WYOMING. WEBCAMS ARE SHOWING SIGNIFICANT IMPROVEMENT
IN VISIBILITIES CAUSED BY BLOWING SNOW. MUCH OF THE LOOSE SNOW HAS
ALREADY BEEN SCOURED AWAY. THEREFORE CANCELLED THE BLIZZARD
WARNING FOR THE ARLINGTON AND REPLACED WITH A HIGH WIND WARNING.
WILL CONTINUE TO SEE SOME BLOWING SNOW INTO TOMORROW AFTERNOON BUT
THE IMPACT WILL CONTINUE TO BE REDUCED THROUGH TIME DUE TO THE
LOSS OF LOOSE SNOW COVER.

THE WIND WILL BE THE MAIN STORY TONIGHT AND TOMORROW. SUSTAINED
WESTERLY WINDS OF 35 TO 45 MPH WILL CONTINUE OVER THE WIND PRONE
AREAS OF SOUTHEAST WYOMING...SUCH AS THE SOUTHERN LARAMIE RANGE...
NORTHERN SNOWY RANGE FOOTHILLS AND AROUND BORDEAUX. WINDS WILL
GENERALLY GUST IN THE 50 TO 60 MPH RANGE BUT COULD SEE A FEW GUSTS
AS HIGH AS 70 MPH.

UPPER LEVEL ENERGY PASSING THOUGH NORTHWEST FLOW ALOFT WILL BRING
A SMALL CHANCE FOR LIGHT SNOW TO THE MOUNTAINS AND NORTHERN PORTIONS
OF THE CWA LATE TUESDAY AND TUESDAY NIGHT. NOT EXPECTING MUCH IN THE
WAY OF MEASURABLE PRECIPITATION IF ANY. MAIN CHANCE WILL BE OVER THE
SNOWY AND SIERRA MADRE RANGES WHERE A FEW INCHES OF SNOW ARE
POSSIBLE...BUT CONSIDERING THE MODELS HAVE BE OVER ESTIMATING THE
AMOUNT OF MID LEVEL MOISTURE THAT LAST SEVERAL DAYS...MAY NOT EVEN
SEE SNOW IN THE MOUNTAINS.

.LONG TERM...(THURSDAY THROUGH MONDAY)
ISSUED AT 300 PM MST MON DEC 9 2013

RATHER FLAT UPPER RIDGE WILL PASS ACROSS THE REGION THURSDAY WITH
THE MILDEST DAY OF THE WEEK LIKELY ON THAT DAY...THOUGH GUIDANCE
SEEMS TOO WARM. UPPER TROF PASSES ACROSS FRIDAY BRINGING A PUSH OF
COOLER PACIFIC AIR. SOME INCREASE IN MOISTURE SHOULD ALLOW FOR A
FEW SNOW SHOWERS OVER THE HIGHER MTNS FRIDAY INTO SATURDAY.
TEMPERATURES WILL NUDGE BACK DOWN CLOSER TO SEASONAL LEVELS
THROUGH THE WEEKEND INTO EARLY NEXT WEEK WITH MAINLY DRY WEATHER AS
A NORTHWESTERLY FLOW ALOFT HOLDS OVER THE REGION.

&&

.AVIATION...(FOR THE 06Z TAFS THROUGH 06Z TUESDAY EVENING)
ISSUED AT 1220 AM MST TUE DEC 10 2013

STRONG WINDS WILL CONTINUE ACROSS SOUTHEAST WYOMING THROUGH
TUESDAY...WITH MVFR VIS AND EVEN BRIEFLY IFR VIS (MAINLY AT KLAR)
EXPECTED AT TIMES DUE TO BLOWING SNOW. VFR CONDITIONS OVER THE NEB
PANHANDLE...WITH BREEZY WNW TO CONTINUE THROUGH THE PERIOD.


&&

.FIRE WEATHER...
ISSUED AT 217 AM MST MON DEC 9 2013

MINIMAL FIRE WEATHER CONCERNS ACROSS THE REGION. TEMPERATURES WILL
CONTINUE TO BE BELOW NORMAL THROUGH MIDWEEK. WINDS WILL REALLY
BEGIN TO INCREASE ACROSS SOUTHEAST WYOMING BY MONDAY AFTERNOON.
GUSTS TO 60 MPH WILL BE POSSIBLE IN THE WIND PRONE AREAS THROUGH
TUESDAY AFTERNOON DUE TO A STRONG PRESSURE GRADIENT. MINIMUM
AFTERNOON HUMIDITY VALUES WILL BE ABOVE 50 PERCENT THROUGH
WEDNESDAY.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...HIGH WIND WARNING UNTIL 6 PM MST THIS EVENING FOR WYZ106-110-
     116>118.

NE...NONE.
&&

$$

UPDATE...FINCH
SHORT TERM...LIEBL
LONG TERM...RE
AVIATION...FINCH
FIRE WEATHER...LIEBL