071  
FNUS76 KPQR 121232  
FWSPQR  
 
SPOT FORECAST FOR HORSE SHOE FIRE...WAPCC  
NATIONAL WEATHER SERVICE PORTLAND OR  
532 AM PDT TUE AUG 12 2025  
 
FORECAST IS BASED ON FORECAST START TIME OF 0600 PDT ON AUGUST 12.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
..HEAT ADVISORY IN EFFECT UNTIL 10 PM PDT THIS EVENING
 
 
   
DISCUSSION
 
HOT AND DRY CONDITIONS CONTINUE TODAY WITH LIGHT  
NORTH WINDS. EXPECT HIGH OVERNIGHT HUMIDITY RECOVERIES. ONSHORE  
FLOW STRENGTHENS ON WEDNESDAY WITH WINDS SHIFTING MORE WESTERLY,  
BRINGING HIGHER DAYTIME HUMIDITY. RAIN CHANCES RETURN LATE IN THE  
WEEK.  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
CWR.................0 PERCENT.  
CHANCE OF LIGHTNING.0 PERCENT.  
MAX TEMPERATURE.....AROUND 97.  
MIN HUMIDITY........32 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......LIGHT WINDS BECOMING NORTH AROUND 5 MPH LATE IN  
THE AFTERNOON.  
MIXING HEIGHT.......5300 FT AGL.  
TRANSPORT WINDS.....NORTH 6 TO 12 MPH.  
 
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........8 9 6 4 4 5 4 4 4 4 3 4  
CWR.............0 0 0 0 0 0 0 0 0 0 0 0  
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 0 0  
TEMP............65 67 71 75 81 85 89 93 95 96 97 97  
RH..............73 75 71 62 57 50 46 40 37 35 33 33  
20 FT WIND DIR..NE N N N N N N N N N NW N  
20 FT WIND SPD..2 2 2 2 3 3 4 4 5 5 5 5  
20 FT WIND GUST.6 6 6 6 6 6 8 10 10 10 11 11  
MIX HGT (KFT)...0.9 0.9 1.3 1.7 2.0 2.5 3.0 4.0 4.4 5.1 5.3 4.5  
TRANSP WIND DIR.N N N N N N N N N N N N  
TRANSP WIND SPD.8 7 7 7 6 6 6 7 7 7 9 12  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
CWR.................0 PERCENT.  
CHANCE OF LIGHTNING.0 PERCENT.  
MIN TEMPERATURE.....AROUND 58.  
MAX HUMIDITY........89 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......NORTHWEST WINDS AROUND 5 MPH EARLY IN THE  
EVENING BECOMING LIGHT.  
MIXING HEIGHT.......800 FT AGL.  
TRANSPORT WINDS.....NORTHWEST 7 TO 10 MPH SHIFTING TO THE SOUTHWEST  
AROUND 6 MPH LATE IN THE EVENING.  
 
TIME (PDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........4 3 8 5 5 3 7 7 6 13 20 24  
CWR.............0 0 0 0 0 0 0 0 0 0 0 0  
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 0 0  
TEMP............95 92 86 80 76 71 67 65 63 61 60 59  
RH..............36 40 47 54 61 67 76 79 85 87 87 90  
20 FT WIND DIR..NW NW N NW S S S S S S S S  
20 FT WIND SPD..5 5 4 4 4 4 4 4 4 4 3 4  
20 FT WIND GUST.10 10 8 8 8 8 8 8 8 8 8 8  
MIX HGT (KFT)...3.1 1.4 1.1 0.9 0.9 0.8 0.8 0.8 0.8 0.9 0.9 0.9  
TRANSP WIND DIR.NW NW N W W W W SW SW SW SW SW  
TRANSP WIND SPD.10 9 9 8 7 6 6 6 6 6 6 6  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING PARTLY CLOUDY.  
CWR.................2 PERCENT.  
CHANCE OF LIGHTNING.2 PERCENT.  
MAX TEMPERATURE.....AROUND 78.  
MIN HUMIDITY........59 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......LIGHT WINDS BECOMING WEST 5 TO 6 MPH LATE IN  
THE MORNING.  
MIXING HEIGHT.......3500 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 6 TO 12 MPH SHIFTING TO THE WEST 10  
TO 12 MPH IN THE AFTERNOON.  
 
TIME (PDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........24 24 28 28 28 36 36 36 31 31 31 31  
CWR.............0 0 0 0 0 0 0 0 0 0 0 0  
CHC OF LTNG (%).0 0 0 0 0 0 0 0 0 0 0 0  
TEMP............58 60 62 65 68 71 73 74 76 76 76 76  
RH..............91 91 88 83 78 73 69 65 62 60 59 59  
20 FT WIND DIR..S S SW SW SW SW SW SW W W W W  
20 FT WIND SPD..4 4 4 4 4 5 5 5 6 6 6 6  
20 FT WIND GUST.8 8 8 8 8 10 10 10 12 12 12 12  
MIX HGT (KFT)...1.0 1.3 1.6 1.9 2.3 2.7 3.1 3.3 3.5 3.5 3.4 3.2  
TRANSP WIND DIR.SW SW W W W W W W W W W W  
TRANSP WIND SPD.6 6 6 7 9 10 12 12 12 12 12 10  
 

 
FORECASTER...ALVIZ  
REQUESTED BY...WAPCC  
TYPE OF REQUEST...WILDFIRE  
.TAG 2519758.0/PQR  
.DELDT 08/12/25  
.FORMATTERVERSION 2.0.0  
.EMAIL PCDISPATCH@DNR.WA.GOV  
 
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