893  
FXUS65 KBOU 091723  
AFDBOU  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE DENVER/BOULDER CO  
1123 AM MDT FRI MAY 9 2025  
   
KEY MESSAGES  
 
- WARM WEATHER CONTINUES THROUGH EARLY NEXT WEEK. STILL A FEW LATE  
DAY SHOWERS AND STORMS MOST DAYS MAINLY OVER THE HIGHER TERRAIN  
TODAY AND SATURDAY.  
 
- DRIER SUNDAY THROUGH TUESDAY ACROSS THE AREA BUT CAN'T RULE OUT  
ISOLATED SHOWERS/THUNDERSTORMS ACROSS THE HIGH COUNTRY DURING  
THE AFTERNOON. THE PLANS ARE LIKELY TO REMAIN DRY.  
 
 
 
   
DISCUSSION /THROUGH THURSDAY/  
 
ISSUED AT 149 PM MDT THU MAY 8 2025  
 
GENERALLY QUIET ACROSS THE FORECAST AREA THIS AFTERNOON, AS  
RIDGING HAS STARTED TO DEVELOP TO THE NORTH/WEST OF THE REGION.  
THERE'S STILL QUITE A BIT OF MID-LEVEL MOISTURE ACROSS THE AREA,  
WITH A PIECE OF THE PREVIOUS TROUGH/UPPER LOW STILL HANGING BACK  
ACROSS SOUTHERN CO/NORTHERN NM. THERE'S BEEN A FEW WEAK SHOWERS  
ACROSS THE EASTERN PLAINS, WITH SLIGHTLY DEEPER CONVECTIVE CLOUD  
COVER OVER THE HIGHER ELEVATIONS. THIS ACTIVITY SHOULD GRADUALLY  
DRIFT SOUTH-SOUTHEASTWARD THROUGH THE DAY FOLLOWING THE WEAK  
STEERING FLOW.  
 
WE'LL END THE WEEK WITH FAIRLY QUIET AND WARMER CONDITIONS, AS THE  
UPPER RIDGE CONTINUES TO BUILD ACROSS THE ROCKIES. HIGHS SHOULD  
REACH THE 70S ACROSS THE PLAINS WITH MOSTLY CLEAR SKIES. THE  
INCREASE INSTABILITY/STEEPENING LAPSE RATES OVER THE HIGH COUNTRY  
SHOULD ALLOW FOR WIDELY SCATTERED SHOWERS AND THUNDERSTORMS TO  
DEVELOP IN THE AFTERNOON.  
 
OUR WARMING TREND IS LIKELY TO CONTINUE THIS WEEKEND INTO NEXT  
WEEK. THE UPPER LEVEL RIDGE SHOULD STRENGTHEN A BIT MORE THIS  
WEEKEND AND WILL LIKELY SHIFT A BIT MORE TO THE EAST AS A BROAD  
TROUGH APPROACHES THE PACNW COASTLINE. HIGHS SHOULD AGAIN REACH  
THE 70S TO LOW 80S ON SATURDAY, WITH 80S LIKELY BY SUNDAY THROUGH  
TUESDAY. AS THE TROUGH APPROACHES, SOUTHWESTERLY FLOW ALOFT  
SHOULD STRENGTHEN, LEADING TO A POTENTIAL INCREASE IN FIRE DANGER  
FOR MOST OF THE FORECAST AREA.  
 
THE TROUGH SHOULD RACE ACROSS THE INTERMOUNTAIN WEST BY EARLY/MID  
WEEK, THOUGH GUIDANCE STILL KEEPS THE TRACK TO OUR NORTH, LEAVING  
US ON THE DRIER/WINDIER SIDE. BOTH DETERMINISTIC AND ENSEMBLE HAVE  
A GOOD SIGNAL FOR COOLER TEMPERATURES FOR THE LATTER HALF OF NEXT  
WEEK, BUT IT'S TOO EARLY TO WORRY TOO MUCH ABOUT THAT TIMEFRAME.  
 
 
   
AVIATION /18Z TAFS THROUGH 18Z SATURDAY/  
 
ISSUED AT 1122 AM MDT FRI MAY 9 2025  
 
VFR THROUGH THE TAF PERIOD. A GRADUAL CLOCKWISE TURN OF THE WINDS  
IS EXPECTED THIS AFTERNOON AND EVENING, FROM NORTH TO NORTHEAST  
TO EAST, BEFORE DRAINAGE WINDS REDEVELOP. NO CEILING OR VISIBILITY  
CONCERNS ARE ANTICIPATED.  
 
 
   
BOU WATCHES/WARNINGS/ADVISORIES  
 
NONE.  
 
 
 
 
 
DISCUSSION...HIRIS  
AVIATION...HIRIS  
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