400  
FNUS75 KGJT 201137  
FWSGJT  
 
SPOT FORECAST FOR ABAJO PEAK PILE RX...USFS  
NATIONAL WEATHER SERVICE GRAND JUNCTION CO  
537 AM MDT WED OCT 20 2021  
 
FORECAST IS BASED ON IGNITION TIME OF 0600 MDT ON OCTOBER 20.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
A RIDGE OF HIGH PRESSURE WILL SLIDE OVERHEAD TODAY,  
LEADING TO MOSTLY SUNNY SKIES AND DRY CONDITIONS. WEAK WINDS ALOFT  
WILL RESULT IN POOR SMOKE DISPERSAL AND INSUFFICIENT MIXING. WINDS  
WILL INCREASE FRIDAY INTO THE WEEKEND AS THE NEXT STORM SYSTEM  
APPROACHES AND RETURNS THE CHANCE FOR SHOWERS LATE THIS WEEKEND  
INTO EARLY NEXT WEEK.  
   
TODAY
 
 
SKY/WEATHER.........SUNNY (0-10%) THEN BECOMING PARTLY CLOUDY  
(30-40%).  
MAX TEMPERATURE.....40-45 F.  
MIN HUMIDITY........38-43%.  
WIND (20 FT)........DOWNSLOPE/DOWNVALLEY 3 TO 6 MPH UNTIL 1000, THEN  
BECOMING UPSLOPE/UPVALLEY (SOUTHWEST AT RIDGETOPS)  
5 TO 10 MPH.  
SMOKE DISPERSAL.....POOR (11000-20000 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW.  
LAL.................1.  
MIXING HEIGHT.......INCREASING TO 3300 FT AGL BY PEAK HEATING IN THE  
AFTERNOON.  
TRANSPORT WINDS.....WEST 5 MPH.  
CLEARING INDEX......160.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (20-30%).  
MIN TEMPERATURE.....24-29 F.  
MAX HUMIDITY........54-59%.  
WIND (20 FT)........SOUTHWEST WINDS 5 TO 10 MPH IN THE EARLY EVENING,  
BECOMING DOWNSLOPE/DOWNVALLEY 3 TO 6 MPH AFTER  
SUNSET.  
SMOKE DISPERSAL.....POOR (1000-6000 KNOT-FT).  
HAINES INDEX........2 OR VERY LOW.  
LAL.................1.  
MIXING HEIGHT.......LOWERING TO 1000 FT AGL OR LESS AFTER SUNSET.  
TRANSPORT WINDS.....WEST 5 MPH.  
CLEARING INDEX......60.  
   
THURSDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY (40-50%).  
MAX TEMPERATURE.....43-48 F.  
MIN HUMIDITY........34-39%.  
WIND (20 FT)........DOWNSLOPE/DOWNVALLEY 3 TO 6 MPH UNTIL 1000, THEN  
BECOMING UPSLOPE/UPVALLEY (SOUTHWEST AT RIDGETOPS)  
5 TO 10 MPH.  
SMOKE DISPERSAL.....POOR (7000-21000 KNOT-FT).  
HAINES INDEX........3 OR VERY LOW.  
LAL.................1.  
MIXING HEIGHT.......INCREASING TO 3500 FT AGL BY PEAK HEATING IN THE  
AFTERNOON.  
TRANSPORT WINDS.....SOUTHWEST 5 MPH.  
CLEARING INDEX......140.  
 

 
FORECASTER...MATT ALEKSA  
REQUESTED BY...MARK ATWOOD  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2119770.0/GJT  
.DELDT 10/20/21  
.FORMATTERVERSION 1.0.26  
.EMAIL MARK.ATWOOD@USDA.GOV  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab CO Page
The Nexlab UT Page Main Text Page