610  
FXUS65 KCYS 192002  
AFDCYS  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE CHEYENNE WY  
200 PM MDT FRI OCT 19 2018  
   
SHORT TERM
 
(THIS EVENING THROUGH MONDAY)  
ISSUED AT 200 PM MDT FRI OCT 19 2018  
 
THE AFTERNOON WATER VAPOR LOOP SHOWED A UPPER HIGH OVER WA/OR AND  
UPPER TROUGH AXIS FROM MN THROUGH THE CENTRAL PLAINS/ROCKIES TO A  
LOW OFF NORTHERN BAJA CA. A WEAK FRONT WAS PROGRESSING SOUTH ACROSS  
THE HIGH PLAINS, ACCOMPANIED BY GUSTY NORTHERLY WINDS TO 30 MPH.  
SKIES WERE SUNNY AND TEMPERATURES WERE IN THE MID 50S TO MID 60S.  
 
MODELS HAVE BEEN CONSISTENT THE PAST FEW DAYS WITH DRY AND WARM  
WEATHER UNDER A HIGH PRESSURE RIDGE THIS WEEKEND. WINDS WILL BE  
LIGHT SOUTHERLY SATURDAY, SHIFTING TO WESTERLY AND BECOMING BREEZY  
SUNDAY AHEAD OF AN APPROACHING COLD FRONT FROM THE NORTH. 700MB  
TEMPERATURES WILL WARM TO 4 TO 6 DEGREES CELSIUS, WITH HIGHS IN  
THE 60S SATURDAY AND MID 60S TO MID 70S SUNDAY. THE COLD FRONT  
MOVES SOUTH ACROSS THE HIGH PLAINS SUNDAY NIGHT, WITH WINDS  
SHIFTING TO EASTERLY. SOME LOW/MID LEVEL MOISTURE WILL RESULT IN  
SLIGHT CHANCES FOR SHOWERS OVER THE SNOWY/SIERRA MADRE MOUNTAINS  
MONDAY. HIGH TEMPERATURES MONDAY WILL COOL INTO THE LOW TO MID 60S,  
STILL ABOUT 5 DEGREES ABOVE SEASONAL NORMALS.  
   
LONG TERM
 
(MONDAY NIGHT THROUGH FRIDAY)  
ISSUED AT 200 PM MDT FRI OCT 19 2018  
 
A RATHER BROAD UPPER TROUGH WILL APPROACH THE REGION MONDAY AND  
TUESDAY THEN ACROSS THE AREA WEDS. IT WILL BRING COOLER AND A BIT  
UNSETTLED WEATHER OVER THE CWA, ALTHOUGH TEMPERATURES WILL BE BE  
MILD, CLOSE TO SEASONAL AVERAGES. MOST OF THE RAIN/SNOW ASSOCIATED  
WITH THIS SYSTEM WILL FALL OVER THE MTNS THOUGH OVERALL AMOUNTS  
SHOULD BE LIGHT. MAINLY DRY AND MILD WEATHER SHOULD RETURN FOR  
THURSDAY AND FRIDAY AHEAD OF A STRONGER COLD FRONT THAT IS PROGGED  
TO PASS ACROSS LATE IN THE DAY FRIDAY.  
 

 
   
AVIATION
 
(FOR THE 18Z TAFS THROUGH 18Z SATURDAY MORNING)  
 
VFR CONDITIONS WILL CONTINUE OVER ALL TERMINALS THROUGH THE PERIOD.  
BREEZY NORTHERLY WINDS WILL EXIST OVER THE EASTERN PLAINS THIS  
AFTERNOON WITH GUSTS AROUND 25 KNOTS. LIGHT WINDS BY MID-EVENING.  
 

 
   
FIRE WEATHER
 
 
ISSUED AT 135 PM MDT FRI OCT 19 2018  
 
DESPITE THE DRY AND WARM WEATHER THIS WEEKEND, MINIMUM HUMIDITIES  
AND WINDS WILL BE NON-CRITICAL. ABOVE NORMAL TEMPERATURES WILL  
CONTINUE NEXT WEEK WITH SLIGHT CHANCES FOR SHOWERS.  
 

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

 
 

 
 
SHORT TERM...MAJ  
LONG TERM...RE  
AVIATION...RE  
FIRE WEATHER...MAJ  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab WY Page
The Nexlab NE Page Main Text Page