417  
FNUS76 KPQR 230043  
FWSPQR  
 
SPOT FORECAST FOR EAGLE CREEK WEST...WIIMT #12  
NATIONAL WEATHER SERVICE PORTLAND OR  
543 PM PDT FRI SEP 22 2017  
 
FORECAST IS BASED ON REQUEST TIME OF 0600 PDT ON SEPTEMBER 23.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE PORTLAND, OREGON OFFICE.  
   
DISCUSSION
 
HIGH PRESSURE ALOFT WILL RESIDE OVER NORTHWEST  
OREGON THROUGH THE WEEKEND. HOWEVER, A COUPLE OF WEAK DISTURBANCES  
ARE EXPECTED TO PASS THROUGH THE RIDGE IN NORTH FLOW ALOFT. THE  
FIRST OF THESE MOVES SOUTH ALONG THE OREGON COAST SATURDAY MORNING.  
THIS FEATURE WILL RESULT IN MID-LEVEL CLOUDS SATURDAY MORNING,  
ABOVE THE LOW-LEVEL MARINE LAYER. DO NOT EXPECT ANY PRECIPITATION  
WITH THIS SYSTEM. ANOTHER WEAK IMPULSE SLIDES SOUTH SATURDAY NIGHT  
AND EARLY SUNDAY, BUT WILL HAVE LITTLE TO NO IMPACT ON THE WEST  
PART OF THE FIRE. SUNDAY LOOKS TO BE A FEW DEGREES WARMER THAN  
SATURDAY.  
 
EXTENDED DISCUSSION INCLUDED BELOW IN THE EXTENDED FORECAST.  
   
SATURDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. BECOMING PARTLY CLOUDY  
AROUND 1400. PATCHY FOG IN THE MORNING.  
CWR.................0 PERCENT.  
LAL.................1.  
MAX TEMPERATURE.....62-66, BUT 57-61 ABOVE 2000 FEET.  
MIN HUMIDITY........52-62 PERCENT, BUT TO 70 PERCENT ABOVE 2000 FEET.  
WIND (20 FT)........  
SLOPE/VALLEY.......COLUMBIA GORGE: LIGHT WIND IN THE MORNING THEN  
WEST TO NORTHWEST 2 TO 6 MPH.  
 
ELSEWHERE: UP-SLOPE/UP-CANYON TO 6 MPH.  
HAINES INDEX(HIGH)..2 (VERY LOW).  
RAINFALL AMOUNT.....0.00 INCHES.  
   
SATURDAY NIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY. PATCHY FOG AFTER MIDNIGHT.  
CWR.................0 PERCENT.  
LAL.................1.  
MIN TEMPERATURE.....43-48.  
MAX HUMIDITY........85-100 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......COLUMBIA GORGE: WEST TO NORTHWEST 3 TO 7 MPH  
EARLY EVENING THEN BECOMING LIGHT AND  
VARIABLE.  
 
ELSEWHERE: DOWN-SLOPE/DOWN-CANYON TO 5 MPH.  
HAINES INDEX(HIGH)..2 (VERY LOW).  
RAINFALL AMOUNT.....0.00 INCHES.  
   
SUNDAY
 
 
SKY/WEATHER.........AREAS OF MORNING LOW CLOUDS OTHERWISE  
PARTLY CLOUDY. PATCHY MORNING FOG.  
CWR.................0 PERCENT.  
LAL.................1.  
MAX TEMPERATURE.....65-70, BUT 60-65 ABOVE 2000 FEET.  
MIN HUMIDITY........45-55 PERCENT, BUT TO 65 PERCENT RIDGES  
AND SHELTERED SLOPES.  
WIND (20 FT)........  
SLOPE/VALLEY.......COLUMBIA GORGE: LIGHT AND VARIABLE IN THE  
MORNING THEN WEST TO NORTHWEST 5 TO 10 MPH.  
 
ELSEWHERE: UP-SLOPE/UP-CANYON 3 TO 7 MPH  
AFTER 1100.  
HAINES INDEX(HIGH)..2 (VERY LOW).  
RAINFALL AMOUNT.....0.00 INCHES.  
   
FORECAST DAYS 3 THROUGH 7
 
 
   
DISCUSSION
 
THE TAIL END OF A WARM FRONT IS EXPECTED TO  
BRUSH ACROSS SOUTHWEST WASHINGTON AND FAR NORTHWEST OREGON  
LATE SUNDAY NIGHT AND MONDAY MORNING. THIS COULD BRING SOME  
LIGHT RAIN TO THE WEST SIDE OF THE FIRE. HIGH PRESSURE  
THEN STRENGTHENS MONDAY NIGHT AND TUESDAY AND CONTINUES  
TO AMPLIFY TUESDAY NIGHT AND WEDNESDAY. MODELS STILL SHOW  
OFFSHORE LOW-LEVEL FLOW DEVELOPING TUESDAY NIGHT AND  
POSSIBLY LASTING THROUGH THURSDAY MORNING.  
 
   
MONDAY
 
 
MOSTLY CLOUDY WITH A SLIGHT CHANCE OF RAIN. LOWS 45 TO 52. HIGHS  
58 TO 65. SOUTHWEST TO WEST WIND TO 6 MPH. MINIMUM HUMIDITY 60-70  
PERCENT, BUT TO 80 PERCENT ABOVE 2000 FEET.   
TUESDAY
 
 
MOSTLY CLOUDY IN THE MORNING THEN PARTLY CLOUDY. LOWS 46 TO 54. HIGHS  
65 TO 75. NORTHWEST WIND 3 TO 8 MPH. MINIMUM HUMIDITY 45-60 PERCENT.    
WEDNESDAY
 
 
MOSTLY CLEAR. LOWS 50 TO 60. HIGHS 72 TO 82. EAST WIND TO 10 MPH WITH  
GUSTS TO 20 MPH, BUT TO 20 MPH WITH GUSTS TO 35 MPH FAR WEST PART OF  
GORGE, TO INCLUDE CORBETT AND VISTA HOUSE. MINIMUM HUMIDITY 30-45 PERCENT.    
THURSDAY
 
 
MOSTLY CLEAR. LOWS 53 TO 63. HIGHS 72 TO 82. EAST WIND TO 15 MPH WITH  
GUSTS TO 25 MPH, BUT TO 20 MPH WITH GUSTS TO 35 MPH FAR WEST PART OF THE  
GORGE TO INCLUDE CORBETT AND VISTA HOUSE. WIND DECREASING IN THE  
AFTERNOON. MINIMUM HUMIDITY 25-40 PERCENT.    
FRIDAY
 
 
PARTLY CLOUDY. LOWS 50 TO 60. HIGHS 67 TO 77. LIGHT WIND, BUT EAST  
TO 10 MPH FAR WEST PART OF THE GORGE. WIND SHIFTING TO WEST 5 TO 15  
MPH IN THE AFTERNOON. MINIMUM HUMIDITY 35-50 PERCENT.  
 

 
FORECASTER...WEISHAAR  
REQUESTED BY...FBAN  
TYPE OF REQUEST...WILDFIRE  
.TAG 1716084.2/PQR  
.EMAIL COLIN.ROBERTSON@DNR.WA.GOV  
 
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