Area Forecast Discussion
Issued by NWS Cheyenne, WY

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FXUS65 KCYS 041121
AFDCYS

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
421 AM MST WED MAR 4 2015

.SHORT TERM...(TODAY AND FRIDAY NIGHT)
ISSUED AT 410 AM MST WED MAR 4 2015

SNOW IS FINALLY WINDING DOWN AS THE FINAL SNOW BAND SAGS SOUTH EARLY
THIS MORNING WHILE THE MID-LEVEL TROUGH AXIS APPROACHES AND THE JET
ENERGY DEPARTS. LLVL FLOW HAS TURNED FROM NNE EARLIER IN THE NIGHT
TO MORE NORTHERLY...ESSENTIALLY TURNING OFF ANY UPSLOPE ENHANCEMENT.
OTHER THAN PERHAPS SOME LINGERING LIGHT SNOW OVR THE MOUNTAINS
EXPECT A DRY START TO THE DAY ALONG WITH GRADUALLY CLEARING SKIES.
THE MAIN LEFTOVER IMPACT FROM THIS SYSTEM REMAINS THE BITTERLY COLD
WIND CHILLS WHICH AS OF 10Z WERE COLDER THAN -20F ACROSS MAINLY
CARBON AND ALBANY COUNTIES. WILL ADD CARBON COUNTY TO THE ADVISORY
WITH THE MORNING FORECAST ISSUANCE.

OTHERWISE...THE LATTER HALF OF THE WEEK WILL BE DRY UNDERNEATH
PROGRESSIVE NORTHWEST FLOW. TODAY WILL BE THE LAST COLD DAY AS THE
LLVL THERMAL TROUGH SWEEPS EAST INTO THE PLAINS. H7 TEMPERATURES
WILL HOVER GENERALLY BETWEEN -18C AND -22C TODAY...YIELDING HIGH
TEMPERATURES THAT WILL REACH ONLY INTO THE TEENS MOST PLACES...WITH
PERHAPS A FEW LOW 20S ACROSS LOWEST ELEVATIONS OF THE WRN
NEBRASKA PANHANDLE. H7 TEMPS WARM TO BETWEEN -8C TO -10C ON
THURSDAY AND TO AROUND -3C FOR FRIDAY. THE RESULT WILL BE FOR
HIGHS TOR EACH THE 30S/LOW 40S THURSDAY AND 30S WEST TO 40S/LOW
50S EAST ON FRIDAY. BREEZY CONDITIONS WILL RETURN DURING THE
AFTERNOON HOURS THURSDAY AND FRIDAY...WITH GUSTS OF 20-35 MPH BOTH
DAYS.

.LONG TERM...(SATURDAY THROUGH TUESDAY)
ISSUED AT 410 AM MST WED MAR 4 2015

THE EXTENDED PERIOD WILL FEATURE WARM AND TRANQUIL CONDITIONS...A
WELCOME RELIEF FROM THE RECENT COLD STRETCH. DRY NORTHWESTERLY
FLOW ALOFT WILL BE IN PLACE THROUGH THE WEEKEND WITH A FEW
SHORTWAVES MOVING ACROSS THE DAKOTAS. THESE WILL BE FAR ENOUGH
REMOVED FROM THE CWA THAT THEIR ASSOCIATED PRESSURE FALLS WILL NOT
HAVE MUCH OF AN IMPACT ON WINDS ACROSS OUR REGION. WITH 700MB
TEMPS AROUND -5C...TEMPS WILL BE NEAR TO SLIGHTLY ABOVE NORMAL.
WARMER TEMPS WILL ARRIVE BY EARLY NEXT WEEK AS FLOW ALOFT BECOMES
MORE ZONAL. STILL THE CAG-CPR GRADIENT REMAINS BELOW 40
METERS AND FLOW ALOFT IS RATHER WEAK...SO NOT EXPECTING ANY WIND
CONCERNS ACROSS SOUTHEAST WY...JUST BREEZY AFTERNOONS. 700MB TEMPS
RISE FURTHER TO AROUND 0C BY TUES...WHICH TRANSLATES INTO
WIDESPREAD HIGHS IN THE 50S TO LOW 60S ACROSS THE PLAINS.

&&

.AVIATION...(FOR THE 12Z TAFS THROUGH 12Z THURSDAY MORNING)
ISSUED AT 410 AM MST WED MAR 4 2015

LIGHT SNOW HAS COME TO AN END ACROSS THE AREA WITH VIS AND CIGS
IMPROVING. VFR CIGS WITH BASES 5-10 THOUSAND FEET AGL WILL BE
POSSIBLE THROUGH THE MID-MORNING. WINDS WILL GENERALLY BE LESS
THAN 15 KTS THROUGH THURS MORNING.

&&

.FIRE WEATHER...
ISSUED AT 410 AM MST WED MAR 4 2015

NO FIRE WEATHER CONCERNS THROUGH THE UPCOMING WEEKEND. A DRY AND
WARMING PERIOD AS TEMPERATURES RETURN TO SEASONAL NORMALS BY THE
WEEKEND AND ABOVE NORMAL EARLY NEXT WEEK.

&&

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...WIND CHILL ADVISORY UNTIL 10 AM MST THIS MORNING FOR WYZ101-102-
     105>107-110-115.

NE...WIND CHILL ADVISORY UNTIL 10 AM MST THIS MORNING FOR NEZ095.

&&

$$

SHORT TERM...CAH
LONG TERM...ZF
AVIATION...ZF
FIRE WEATHER...CAH



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