918
FXUS65 KCYS 292152
AFDCYS
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
352 PM MDT THU MAY 29 2025
KEY MESSAGES
- WARMER TEMPERATURES AND DRIER CONDITIONS WILL PERSIST THROUGH
FRIDAY.
- COOLER AND WETTER WEATHER RETURNS FOR MONDAY THROUGH
WEDNESDAY.
SHORT TERM /THROUGH FRIDAY NIGHT/
ISSUED AT 347 PM MDT THU MAY 29 2025
LINGERING LOW-LEVEL MOISTURE AROUND THE CWA HAS ALLOWED SCATTERED
CLOUDS TO PERSIST ACROSS THE AREA THIS AFTERNOON. OVERALL, IT HAS
BEEN A MUCH DRIER DAY COMPARED TO THE LAST FEW DAYS. HOWEVER, RADAR
DOES SHOW A FEW HIGH TERRAIN SHOWERS OUT WEST. THESE SHOWERS ARE
EXPECTED TO STAY OVER THE MOUNTAINS BUT DISSIPATE AFTER SUNSET,
LEADING TO AN UNEVENTFUL OVERNIGHT.
UPPER-LEVEL RIDGING WILL GRADUALLY PUSH INTO THE GREAT BASIN REGION
ON FRIDAY, USHERING IN WARMER AND DRIER WEATHER. 700 MB TEMPERATURES
WILL BEGIN TO CLIMB ABOVE +10C, LEADING TO SLIGHTLY ABOVE AVERAGE
TEMPERATURES IN THE 70S AND LOW 80S. BEING ON THE EASTERN FRINGE OF
THE RIDGE, CONDITIONS ARE ALSO EXPECTED TO BE DRIER. HI-RES GUIDANCE
SHOWS LITTLE IN THE WAY OF PRECIPITATION CHANCES, HOWEVER A WEAK
UPPER-LEVEL DISTURBANCE AND RESIDUAL MID-LEVEL MOISTURE MAY ONCE
AGAIN SPARK A FEW HIGH TERRAIN SHOWERS.
LONG TERM /SATURDAY THROUGH THURSDAY/
ISSUED AT 347 PM MDT THU MAY 29 2025
SATURDAY...THE LAST DAY OF MAY LOOKS TO BE RELATIVELY DRY IN THE
WAKE OF A SHORTWAVE TROUGH ALOFT PASSAGE. SIMILAR TEMPERATURES
COMPARED TO FRIDAY.
SUNDAY...WITH A DECREASE IN LOW AND MID LEVEL MOISTURE, AND WARM
TEMPERATURES AND A RIDGE ALOFT, SHOWER AND THUNDERSTORM COVERAGE
WILL BE LIMITED. WARMER TEMPERATURES DUE TO LESS CLOUD COVER.
MONDAY...AS A SHORTWAVE TROUGH ALOFT MOVES OVERHEAD, AND SURFACE LOW
PRESSURE FORMS NEAR OUR FORECAST AREA, LOW AND MID LEVEL MOISTURE
WILL INCREASE MARKEDLY, SPARKING SCATTERED TO NUMEROUS SHOWERS AND
THUNDERSTORMS. COOLER TEMPERATURES DUE TO INCREASED CLOUD COVER AND
PRECIPITATION COVERAGE.
TUESDAY...COOLER TEMPERATURES IN THE WAKE OF THE SHORTWAVE TROUGH
ALOFT AND COLD FRONT. LOOKS LIKE ENOUGH LOW AND MID LEVEL MOISTURE
IN THE NORTHWEST FLOW ALOFT FOR SCATTERED TO NUMEROUS SHOWERS AND
THUNDERSTORMS.
WEDNESDAY...TEMPERATURES WILL REMAIN ON THE COOL SIDE BENEATH ZONAL
FLOW ALOFT. WITH ADEQUATE LOW AND MID LEVEL MOISTURE, WE EXPECT
SCATTERED AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS.
THURSDAY...WEST NORTHWEST FLOW ALOFT CONTINUES AND WITH SOME DRYING
NOTED IN THE LOW AND MID LEVELS, COVERAGE OF SHOWERS AND
THUNDERSTORMS WILL BE LESS, WITH WARMER TEMPERATURES EXPECTED.
AVIATION /18Z TAFS THROUGH 18Z FRIDAY/
ISSUED AT 1144 AM MDT THU MAY 29 2025
FOG AND LOW STRATUS HAS CLEARED OUT OF THE AREA WITH SOME LINGERING
SCATTERED LOW-LEVEL CLOUDS STILL AROUND MOST TERMINALS. CONDITIONS
ARE EXPECTED TO STAY VFR THROUGH THE TAF PERIOD AS CLOUDS CONTINUE
TO CLEAR OUT. PRECIPITATION CHANCES ARE MINIMAL WITH LIGHT WINDS
EXPECTED.
CYS WATCHES/WARNINGS/ADVISORIES
WY...NONE.
NE...NONE.
SHORT TERM...SF
LONG TERM...RUBIN
AVIATION...SF
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