446  
FNUS76 KPQR 220331  
FWSPQR  
 
SPOT FORECAST FOR BUCK 50...USFS  
NATIONAL WEATHER SERVICE PORTLAND OR  
831 PM PDT MON MAY 21 2018  
 
FORECAST IS BASED ON IGNITION TIME OF 0700 PDT ON MAY 22.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE PORTLAND, OREGON OFFICE.  
   
..WARMER AND INCREASINGLY UNSTABLE TUESDAY
 
 
   
DISCUSSION
 
AN UPPER LEVEL RIDGE WILL CONTINUE BUILDING OVER THE  
AREA ON TUESDAY WITH WARM TEMPERATURES IN THE AFTERNOON WITH  
INCREASING INSTABILITY AS MID-LEVEL HAINES 6 CONDITIONS EXPECTED.  
HOWEVER, GENERAL ONSHORE FLOW AND SOME RESIDUAL MOISTURE WILL  
KEEP DAYTIME HUMIDITIES ABOVE CRITICAL THRESHOLDS. SLIGHT CHANCE  
OF AN AFTERNOON THUNDERSTORM NEAR THE CREST OF THE CASCADES ON  
TUESDAY AFTERNOON, BUT THIS SHOULD REMAIN WELL EAST OF THE BURN  
LOCATION. PATTERN SHIFTS A BIT WEDNESDAY WITH INCREASING MOISTURE  
AND THE CHANCE OF A THUNDERSTORM NEAR THE BURN LOCATION ON  
WEDNESDAY.  
   
TUESDAY
 
 
SKY/WEATHER.........SUNNY.  
CWR.................0 PERCENT.  
LAL.................1.  
MAX TEMPERATURE.....78-83.  
MIN HUMIDITY........32-37 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......UPSLOPE TO 5 MPH, THEN WEST TO 3 TO 7 MPH  
IN THE AFTERNOON.  
RIDGETOP...........NORTHWEST 5 TO 9 MPH.  
MIXING HEIGHT.......NEAR SURFACE IN THE MORNING, THEN 6500 FT AGL.  
TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.  
HAINES INDEX(HIGH)..2 (VERY LOW).  
HAINES INDEX (MID)..6 (HIGH).  
RAINFALL AMOUNT.....0.00 INCHES.  
 
TIME (PDT) 1000 1200 1400 1600 1800  
SKY (%).........5 5 5 5 15  
TEMP............63 71 76 80 80  
RH..............53 44 39 40 40  
20 FT WIND......UPSLP 2 UPSLP 3 W 5 W 5 W 4  
20 FT WIND GUST.4 4 6 8 8  
 
   
TUESDAY NIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
CWR.................0 PERCENT.  
LAL.................1.  
MIN TEMPERATURE.....53-58.  
MAX HUMIDITY........83-88 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......NORTHWEST WINDS 3 TO 7 MPH, BECOMING  
DRAINAGE LESS THAN 5 MPH LATE.  
RIDGETOP...........NORTHWEST 5 TO 9 MPH.  
MIXING HEIGHT.......7500 FT AGL, THEN NEAR SURFACE.  
TRANSPORT WINDS.....LIGHT WINDS.  
HAINES INDEX(HIGH)..2 (VERY LOW).  
HAINES INDEX (MID)..5 (MODERATE).  
RAINFALL AMOUNT.....0.00 INCHES.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS IN  
THE MORNING, THEN A CHANCE OF SHOWERS AND A  
SLIGHT CHANCE OF THUNDERSTORMS IN THE  
AFTERNOON.  
CWR.................10 PERCENT.  
LAL.................2.  
MAX TEMPERATURE.....72-77.  
MIN HUMIDITY........49-54 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......VARIABLE 0 TO 3 MPH, BECOMING WEST UP TO 6 MPH  
IN THE AFTERNOON. GUSTY AND ERRATIC WINDS  
EXPECTED NEAR THUNDERSTORMS IN THE AFTERNOON.  
RIDGETOP...........NORTHWEST 5 TO 9 MPH.  
MIXING HEIGHT.......NEAR SURFACE, THEN 6500 FT AGL.  
TRANSPORT WINDS.....LIGHT WINDS.  
HAINES INDEX(HIGH)..3 (VERY LOW).  
HAINES INDEX (MID)..5 (MODERATE).  
RAINFALL AMOUNT.....UP TO 0.10 INCHES.  
 

 
FORECASTER...CULLEN  
REQUESTED BY...DIRK ROGERS  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1810439.0/PQR  
.EMAIL DROGERS02@FS.FED.US  
 
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