393  
FXUS65 KCYS 231103  
AFDCYS  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE CHEYENNE WY  
503 AM MDT SAT OCT 23 2021  
   
SHORT TERM
 
(TODAY AND TONIGHT)  
ISSUED AT 301 AM MDT SAT OCT 23 2021  
 
THE NEXT WAVE WILL SWEEP ACROSS THE STATE THIS AFTERNOON AND  
EVENING. CLOUDS WILL INCREASE THROUGH THE MORNING, WHICH WILL HOLD  
TEMPERATURES DOWN ABOUT 5 DEGREES FROM YESTERDAY'S HIGHS. MOISTURE  
WITH THIS TROUGH IS LIMITED, AND THE TROUGH IS MOVING QUICKLY, SO  
PRECIPITATION WILL BE BRIEF, AND LIMITED TO THE OVERNIGHT HOURS  
TONIGHT. MEASURABLE PRECIP WILL BE LIMITED TO CARBON COUNTY  
TONIGHT, WITH A COUPLE INCHES IN THE HIGHER ELEVATIONS AND A  
DUSTING FOR THE LOWER ELEVATIONS. WINDS ON SATURDAY WILL ALSO BE  
GUSTY, WITH SC WY REACHING 30G50MPH AT TIMES IN THE AFTERNOON.  
WINDS WILL DECREASE BEFORE THE MAIN PRECIPITATION BEGINS TO FALL  
SATURDAY EVENING.  
   
LONG TERM
 
(SUNDAY THROUGH FRIDAY)  
ISSUED AT 301 AM MDT SAT OCT 23 2021  
 
AFTER THE TROUGH SWEEPS EAST ACROSS THE CENTRAL PLAINS, RIDGING  
BUILDS BACK ACROSS THE ROCKIES ON SUNDAY. COOLER NORTHWEST WINDS  
WILL AGAIN PICK UP DURING THE DAY, WITH GUSTS APPROACHING 40 TO 45  
MPH STILL POSSIBLE FOR PRONE HIGHER ELEVATIONS. TEMPERATURES WILL  
BE ABOUT 10 DEGREES COLDER THAN SATURDAY, WITH HIGHS ONLY IN THE  
40S AND 50S DURING THE AFTERNOON. MONDAY, THE RIDGE CONTINUES TO  
BUILD JUST TO THE EAST, BRINGING STRONG SOUTHWEST FLOW ACROSS THE  
REGION. WINDS WILL BE NOTICEABLY HIGHER DURING THE DAY, ESPECIALLY  
FOR THE WIND CORRIDOR ACROSS CARBON COUNTY, WITH GUSTS REACHING  
50 MPH IN THE AFTERNOON. TUESDAY, THE LONGWAVE TROUGH FINALLY  
MOVES ACROSS THE ROCKIES, BRINGING THE NEXT STORM SYSTEM ACROSS  
THE REGION. RIGHT NOW, THE TIMING OF THIS SYSTEM REACHES SE WY/NE  
PANHANDLE DURING THE DAY, SO ALMOST ALL PRECIP WILL BE A COLD  
RAINFALL. COLDER AIR WILL NOT ARRIVE UNTIL AFTER THE TROUGH MOVES  
EAST TUESDAY NIGHT, SO ANY CHANGEOVER TO SNOW WILL BE BRIEF,  
MAINLY FOR THE MOUNTAIN RANGES IN CARBON COUNTY. WINDS TUESDAY  
WILL ALSO BE GUSTY FROM THE WEST, RUNNING 25G40MPH FOR MOST AREAS,  
INCLUDING THE I-25 AND I-80 CORRIDORS. FOR THE REMAINDER OF THE  
WEEK, GRADIENT MEASUREMENTS WILL REMAIN TIGHT ACROSS THE STATE,  
KEEPING GUSTY WINDS GOING. WEDNESDAY LOOKS TO BE THE HIGHEST WIND  
DAY, POSSIBLY REACHING WARNING CRITERIA ALONG THE I-80 CORRIDOR  
WEST OF CHEYENNE, IMPACTING ALL OF SOUTHERN WY.  
 

 
   
AVIATION
 
(FOR THE 12Z TAFS THROUGH 12Z SUNDAY MORNING)  
ISSUED AT 500 AM MDT SAT OCT 23 2021  
 
GENERALLY LIGHT WINDS THIS MORNING WITH SOME HIGH CLOUDS MOVING  
ACROSS SOUTHEAST WYOMING AND THE NEBRASKA PANHANDLE. WIND GUSTS 25  
TO 30 KNOTS EXPECTED AT KLAR BETWEEN 19Z AND 23Z AND AT KRWL  
BETWEEN 16Z AND 5Z.  
 
HAZARDS/WEATHER TREND: VFR CONDITIONS ARE EXPECTED FOR MOST AREAS  
THROUGH THE TAF PERIOD. RAIN SHOWERS ARE POSSIBLE AT KRWL AND  
KLAR AFTER 00Z WITH VFR TO MVFR CEILINGS BEHIND THE SHOWERS.  
 

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

 
 

 
 
SHORT TERM...JS  
LONG TERM...JS  
AVIATION...LK  
 
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