476  
FNUS76 KPDT 131147  
FWSPDT  
 
SPOT FORECAST FOR AHTANUM MEDOWBROOK RX...YAKAMA AGENCY  
NATIONAL WEATHER SERVICE PENDLETON OR  
447 AM PDT THU JUN 13 2024  
 
FORECAST IS BASED ON IGNITION TIME OF 0800 PDT ON JUNE 13.  
***THUNDERSTORMS IMPLY GUSTY AND ERRATIC WINDS***  
***WINDS ARE 20 FOOT 10-MINUTE AVERAGES***  
***CWR-CHANCE OF WETTING RAIN 0.10 OR GREATER***  
 
IF YOU HAVE QUESTIONS OR CONCERNS WITH THIS FORECAST, PLEASE  
CONTACT OUR OFFICE AT (541) 276-8134.  
   
DISCUSSION
 
WARM, DRY WEATHER IS FORECAST TODAY, FOLLOWED BY  
A SHARP TRANSITION TO GUSTY NORTHWEST WINDS THIS EVENING BETWEEN  
7-8PM AS A COLD FRONT SWEEPS ACROSS THE REGION. OVERNIGHT RH RECOVERY  
IS ANTICIPATED TO BE MODERATE TONIGHT. FRIDAY, DRY NORTHWEST WINDS  
WILL PREVAIL WITH SEASONAL TEMPERATURES BEHIND THE FRONT.  
   
REST OF TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT).  
CWR.................0 PERCENT.  
LAL.................1.  
MAX TEMPERATURE.....83-86.  
MIN HUMIDITY........11-16 PERCENT.  
WIND (20 FT)........LIGHT DRAINAGE (DOWNSLOPE, DOWNVALLEY) WINDS  
2-5 MPH VERY EARLY, BECOMING UPVALLEY AND UPSLOPE  
BY MID-MORNING BEFORE SHIFTING TO THE  
SOUTH 4-6 MPH LATE IN THE MORNING, THEN SHIFTING  
TO THE SOUTHWEST 3-6 MPH LATE IN THE AFTERNOON.  
MIXING HEIGHT.......INCREASING TO 6200-6700 FT AGL BY AFTERNOON.  
TRANSPORT WINDS.....LIGHT WINDS BECOMING SOUTH THEN SOUTHWEST 5-9 MPH  
BY LATE MORNING AND AFTERNOON.  
HAINES INDEX........3 TO 4 OR VERY LOW TO LOW POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
 
TIME (PDT) 8 AM 10 AM NOON 2 PM 4 PM 6 PM  
TEMP............58 68 74 79 82 82  
RH..............35 26 21 16 16 18  
20 FT WIND......SW 3 N 4 S 4 S 4 S 4 SW 6  
20 FT WIND GUST. 6 8 8 10  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT) THEN BECOMING  
PARTLY CLOUDY (30-40 PERCENT) THEN BECOMING  
MOSTLY CLEAR (5-15 PERCENT).  
CWR.................0 PERCENT.  
LAL.................1.  
MIN TEMPERATURE.....49-52.  
MAX HUMIDITY........49-54 PERCENT.  
WIND (20 FT)........SHIFTING TO THE NORTHWEST 9-14 MPH BY 7-8 PM,  
GUSTING 15-25 MPH.  
MIXING HEIGHT.......DECREASING TO 500-700 FT AGL IN THE EVENING AND OVERNIGHT.  
TRANSPORT WINDS.....SHIFTING TO THE NORTH 10-15 MPH EARLY IN THE EVENING.  
HAINES INDEX........3 TO 4 OR VERY LOW TO LOW POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
   
FRIDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT) THEN BECOMING  
MOSTLY CLOUDY (70-80 PERCENT).  
CWR.................0 PERCENT.  
LAL.................1.  
MAX TEMPERATURE.....74-77.  
MIN HUMIDITY........17-22 PERCENT.  
WIND (20 FT)........NORTHWEST WINDS 6-11 MPH, GUSTING 12-17 MPH.  
MIXING HEIGHT.......INCREASING TO 7600-8100 FT AGL BY AFTERNOON.  
TRANSPORT WINDS.....NORTHWEST 10-15 MPH.  
HAINES INDEX........3 TO 4 OR VERY LOW TO LOW POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
 

 
FORECASTER...PLUNKETT  
REQUESTED BY...DOLORES MOORE  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2416058.0/PDT  
.DELDT 06/13/24  
.FORMATTERVERSION 2.0.0  
.EMAIL DOLORES_MOORE@YAKAMA.COM  
 
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