National Weather Service Text Product Display

Area Forecast Discussion
Issued by NWS Cheyenne, WY

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000
FXUS65 KCYS 170946
AFDCYS

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
346 AM MDT FRI MAY 17 2013

.SHORT TERM...(TODAY THROUGH SUNDAY NIGHT)
ISSUED AT 345 AM MDT FRI MAY 17 2013

UPPER TROF MOVING EAST AWAY FROM THE CWA THIS MORNING LEAVING A
DRIER SWLY FLOW ALOFT IN ITS WAKE ACROSS THE AREA. WARMER AND
MAINLY DRY WEATHER EXPECTED FOR TODAY AS MID LEVEL TEMPS RISE
AHEAD OF NEXT UPPER TROF WHICH WILL BE MOVING SLOWLY EAST OVER THE
WESTERN PART OF THE COUNTRY. INITIAL SHORTWAVE ASSOCIATED WITH THIS
SYSTEM WILL MOVE ACROSS THE CWA LATE SATURDAY INCREASING THE
CHANCES FOR SHOWERS AND SOME STORMS AS WELL AS BEGIN A COOL DOWN.
SUNDAY WILL BE EVEN COOLER AS A SECOND WAVE MOVES ACROSS WITH AT
LEAST SCTD SHOWERS AND A FEW DAYTIME STORMS WITH ACTIVITY
DIMINISHING SUNDAY NIGHT.

.LONG TERM...(MONDAY THROUGH THURSDAY)
ISSUED AT 345 AM MDT FRI MAY 17 2013

MODELS HAVING SOME DIFFICULTY WITH THE MOVEMENT OF THE UPPER
SYSTEM AFFECTING THE REGION MONDAY...WITH THE GFS MORE PROGRESSIVE
THAN THE ECMWF. REMAINING COOL TO MILD MONDAY AND TUESDAY WITH
DECENT CHANCES FOR SHOWERS AND A FEW STORMS. DRIER AND WARMER WEDS
INTO THURSDAY WITH UPPER FLOW GRADUALLY BACKING TO SW AHEAD OF
NEXT UPPER LOW THAT WILL DROP OVER THE PACIFIC NW WEDS. SHOULD SEE
AN UPTICK IN CONVECTION LATE WEDS AND THURSDAY AS ANY IMPULSES
EJECT NORTHEAST FROM THIS SYSTEM AND ACROSS THE CWA.

&&

.AVIATION...(FOR THE 12Z TAFS THROUGH 12Z SATURDAY MORNING)
ISSUED AT 345 AM MDT FRI MAY 17 2013

VFR EXPECTED OVER ALL TERMINALS THROUGH EARLY SATURDAY UNDER A DRY
SWLY FLOW ALOFT. GUSTY SOUTHWESTERLY WINDS EXPECTED AT KRWL AND
KLAR FROM LATE THIS MORNING INTO THIS EVENING.

&&

.FIRE WEATHER...
ISSUED AT 345 AM MDT FRI MAY 17 2013

GUSTY SWLY WINDS ARE EXPECTED OVER MAINLY CARBON AND ALBANY
COUNTIES LATE THIS MORNING THROUGH THE AFTERNOON. THESE WINDS WILL
COMBINE WITH MIN RHS NEAR 15% BUT CONDITIONS SHOULD BE MITIGATED
BY FUELS IN GREEN-UP. ELSEWHERE LIGHTER WINDS WITH NON-CRITICAL
CONDITIONS TODAY. COOLER AND MORE MOIST CONDITIONS EXPECTED DURING
THE WEEKEND INTO EARLY NEXT WEEK ALLEVIATING CONCERNS.

&&

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

$$

SHORT TERM...RE
LONG TERM...HAMMER
AVIATION...RE
FIRE WEATHER...RE

National Weather Service Weather Forecast Office