Area Forecast Discussion
Issued by NWS Cheyenne, WY

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
FXUS65 KCYS 070428
AFDCYS

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
928 PM MST FRI MAR 6 2015

.SHORT TERM...(THIS EVENING THROUGH SUNDAY NIGHT)
ISSUED AT 200 PM MST FRI MAR 6 2015

EARLY AFTERNOON WATER VAPOR LOOP DEPICTED A BROAD UPPER TROUGH FROM
THE FRONT RANGE EAST THROUGH THE MS VALLEY AND EASTERN CONUS. A
STATIONARY UPPER RIDGE EXTENDED FROM CA INTO THE GULF OF AK. SOME
PACIFIC MOISTURE ALOFT WAS TOPPING THE RIDGE AND STREAMING SOUTHEAST
ACROSS THE REGION. THE PRESSURE GRADIENT HAS RELAXED SOMEWHAT FROM
THIS MORNING...BUT WESTERLY SURFACE WINDS WERE GUSTING 30-40 MPH
THROUGH THE NORMALLY WIND PRONE LOCALES OF SOUTHEAST WY. DOWNSLOPE
FLOW LEE OF THE LARAMIE RANGE PUSHED THE MERCURY INTO THE 40S AND 50S.

LATEST MODEL GUIDANCE IS IN GOOD AGREEMENT KEEPING THE UPPER RIDGE
PARKED NEAR THE WEST COAST THROUGH THE WEEKEND...WITH A FEW WEAK
PASSING SHORTWAVES TRANSLATING SOUTHEAST ACROSS THE CWFA. ONE OF
THOSE WAVES WILL INDUCE A WEAK FROPA SATURDAY NIGHT. NOT EXPECTING
ANYTHING MORE THAN SOME CLOUDS AND A WIND SHIFT TO NORTHWEST.
HIGH TEMPERATURES SATURDAY WILL A CARBON COPY OF TODAY WITH 700MB
TEMPERATURES AROUND -3C. HIGHS SUNDAY WILL BE AROUND 5 DEGREES
COOLER WITH 700MB TEMPERATURES AROUND -6C. WITH A MORE RELAXED
PRESSURE/CROSSFLOW GRADIENT...SURFACE WINDS WILL BE LIGHTER. LOW
TEMPERATURES THIS PERIOD WILL AVERAGE IN THE TEENS AND 20S.

.LONG TERM...(MONDAY THROUGH FRIDAY)
ISSUED AT 200 PM MST FRI MAR 6 2015

DRY AND QUITE MILD WEATHER EXPECTED TO HOLD ACROSS THE CWA FOR
PRETTY MUCH THE ENTIRE WEEK WITH ARCTIC AIR TO REMAIN BOTTLED UP
WAY NORTH OVER NORTHERN AND EASTERN CANADA. NWLY FLOW ALOFT WILL
BEGIN THE WEEK AS AN UPPER RIDGE MOVES ONSHORE OVER THE WESTERN
CONUS AND MOVES SLOWLY EAST THROUGH WEDNESDAY. SFC DOWNSLOPE FLOW
AND RISING HEIGHTS WILL ALLOW TEMPS TO REACH INTO THE 50S AND 60S
THROUGH AT LEAST WEDS WITH NO PRECIPITATION. SOME SUBTLE CHANGES
BEGIN ON THURSDAY AS THE UPPER RIDGE AXIS MOVES EAST AND A MORE
SWLY FLOW ALOFT SETS UP AHEAD OF AN UPPER TROF THAT WILL AMPLIFY
OVER THE DESERT SW. BY FRIDAY COULD SEE A FEW RAIN OR SNOW SHOWERS
MAINLY OVER THE HIGHER MTNS AS THIS SYSTEM MOVES INTO THE 4
CORNERS AREA BUT RIGHT NOW LOOKS TO TRACK SE FROM THERE AND
ESSENTIALLY BYPASS THE CWA WELL TOP THE SOUTH. A LITTLE COOLER ON
FRIDAY HOWEVER AS AN ASSOCIATED PACIFIC FRONT MOVES ACROSS.

&&

.AVIATION...(FOR THE 06Z TAFS THROUGH 06Z SATURDAY NIGHT)
ISSUED AT 927 PM MST FRI MAR 6 2015

VFR CONDITIONS WILL PERSIST OVER ALL TERMINALS THROUGH THE PERIOD
WITH JUST SOME PASSING HIGH CLOUDS IN NORTHWEST FLOW ALOFT FROM
TIME TO TIME.

&&

.FIRE WEATHER...
ISSUED AT 200 PM MST FRI MAR 6 2015

NO FIRE WEATHER CONCERNS ANTICIPATED THIS WEEKEND. RESIDUAL SNOW
COVER FROM THE EARLY WEEK STORM WILL MELT AS TEMPERATURES RISE ABOVE
NORMAL. HIGH PRESSURE WILL BUILD OVER THE DISTRICT TONIGHT AND
SATURDAY WITH LIGHTER WESTERLY WINDS. MINIMUM HUMIDITIES SATURDAY
WILL RANGE FROM 25 TO 35 PERCENT. A WEAK FRONT WILL MOVE SOUTHEAST
ACROSS THE DISTRICT SATURDAY NIGHT...USHERING SLIGHTLY COOLER
TEMPERATURES AND HIGHER HUMIDITIES. NO PRECIPITATION IS FORECAST THIS
WEEKEND. WARMER AND DRIER CONDITIONS WILL RESUME EARLY NEXT WEEK.

&&

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

$$

SHORT TERM...MAJ
LONG TERM...RE
AVIATION...RUBIN
FIRE WEATHER...MAJ



USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.