062
FXUS65 KCYS 230927
AFDCYS
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
227 AM MST MON DEC 23 2024
KEY MESSAGES
- MOUNTAIN SNOW LIKELY TODAY, CONTINUING THROUGH MONDAY.
- ACTIVE PATTERN EXPECTED MID-WEEK ONWARDS WITH DAILY CHANCES
FOR SNOW IN THE MOUNTAINS AND SMALL CHANCES FOR SOME SNOW
ACROSS THE LOWER ELEVATIONS. STRONG WINDS LOOK TO RETURN FOR
THE WEEKEND.
SHORT TERM /THROUGH WEDNESDAY/
ISSUED AT 1238 AM MST MON DEC 23 2024
UPPER TROUGH MOVING THROUGH CENTRAL COLORADO CURRENTLY. A FEW
SNOW SHOWERS SEEN ON RADAR THIS MORNING. GETTING SOME
MEASURABLE SNOWFALL IN THE MOUNTAINS LOOKING AT SNOTEL
OBSERVATIONS. NOTHING TOO BAD SO FAR.
GET A BREAK IN THE STRONG WINDS THE NEXT COUPLE DAYS. CRAIG TO
CASPER 850/700MB HEIGHT GRADIENTS IN THE 40S TODAY AND 30S
TUESDAY. COLORADO TROUGH CONTINUES TO MOVE EAST TODAY WITH SNOW
ENDING IN THE MOUNTAINS THIS EVENING.
RIDGING TUESDAY WITH DRY WEATHER AND LIGHTER WINDS. BEGIN TO SEE
A LOW PRESSURE SYSTEM MOVING INTO WESTERN COLORADO WEDNESDAY.
RIGHT NOW...LOOKING AT LIGHT SNOW WEST OF THE LARAMIE RANGE
CHRISTMAS DAY. VERY MINOR SNOW ACCUMULATIONS AND NO HEADLINES
EXPECTED.
LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/
ISSUED AT 1238 AM MST MON DEC 23 2024
THURSDAY...A PRIMARILY DRY DAY IS EXPECTED AS THE LEADING SHORTWAVE
TROUGH ALOFT MOVES INTO THE TEXAS PANHANDLE, ALTHOUGH THERE WILL
STILL BE A CHANCE OF AFTERNOON OROGRAPHIC SNOW SHOWERS FOR THE
SNOWY AND SIERRA MADRE RANGES IN ADVANCE OF THE NEXT SHORTWAVE
TROUGH ALOFT.
FRIDAY...ANOTHER SHORTWAVE TROUGH ALOFT MOVES OVERHEAD, SPREADING
OROGRAPHIC SNOW SHOWERS OVER OUR SNOWY AND SIERRA MADRE RANGES,
THOUGH WITH MINIMAL PRECIPITATION ELSEWHERE AS THE SYSTEM IS
MOISTURE LACKING. 700 MB TEMPERATURES NEAR -6 CELSIUS WILL YIELD
MAXIMUM TEMPERATURES IN THE MID TO UPPER 30S WEST OF I-25, WITH
MID TO UPPER 40S EAST OF I-25.
SATURDAY...FAST MOVING NORTHWEST FLOW ALOFT DEVELOPS IN THE WAKE OF
THE SHORTWAVE TROUGH ALOFT PASSAGE, PRODUCING A BREEZY TO WINDY DAY,
WITH SLIGHTLY WARMER TEMPERATURES DUE TO LESS CLOUD COVER COMPARED
TO FRIDAY. OROGRAPHIC SNOW SHOWERS CONTINUE FOR THE SNOWY AND SIERRA
MADRE RANGES.
SUNDAY...EXPECT A DECENT WARMING TREND AS 500 MB HEIGHTS RISE SOME
100 METERS FROM SATURDAY, HELPING TO DEVELOP A SURFACE LEE TROUGH.
WITH 700 MB TEMPERATURES NEAR 3 CELSIUS, MAXIMUM TEMPERATURES WILL
BE IN THE MID TO UPPER 40S WEST OF I-25, WITH LOWER TO MID 50S EAST
OF I-25.
AVIATION /00Z TAFS THROUGH 00Z TUESDAY/...
ISSUED AT 951 PM MST SUN DEC 22 2024
SNOW SHOWERS ARE MOVING INTO KRWL AT THIS TIME, LEADING TO
MVFR CONDITIONS FOR THE NEXT FEW HOURS. PERIODS OF IFR VIS WILL
BE POSSIBLE. AFTER SNOW SHOWERS CLEAR OUT AROUND 09Z, LOW CIGS
MAY STICK AROUND THROUGH MID MONDAY MORNING, BUT CONFIDENCE IS
FAIRLY LOW DUE TO SPLIT HIGH RESOLUTION MODEL GUIDANCE.
ELSEWHERE, EXPECT VFR CONDITIONS. MODEST WIND GUSTS OF 20 TO 25
KNOTS ARE POSSIBLE MONDAY MID MORNING THROUGH THE AFTERNOON.
LIGHT WINDS ARE EXPECTED IN NEBRASKA TERMINALS.
CYS WATCHES/WARNINGS/ADVISORIES
WY...NONE.
NE...NONE.
SHORT TERM...GCC
LONG TERM...RUBIN
AVIATION...MN
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