307  
FNUS76 KPQR 202103  
FWSPQR  
 
SPOT FORECAST FOR SILVER CREEK...OREGON DEPARTMENT OF FORESTRY  
NATIONAL WEATHER SERVICE PORTLAND OR  
203 PM PDT FRI JUL 20 2018  
 
FORECAST IS BASED ON FORECAST START TIME OF 2100 PDT ON JULY 20.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE PORTLAND, OREGON OFFICE.  
   
DISCUSSION
 
A LOW LEVEL NORTHWESTERLY FLOW PATTERN UNDER WESTERLY  
FLOW ALOFT WILL MAINTAIN NEAR AVERAGE TEMPERATURES AND MAINLY  
TERRAIN DRIVEN WINDS SATURDAY. THE MAIN EXCEPTION TO THIS WILL BE  
DURING THE AFTERNOON AND EARLY EVENING HOURS, PARTICULARLY SATURDAY,  
WHEN NORTH TO NORTHWESTERLY WINDS WILL BECOME A BIT STRONGER AND  
MORE GUSTY. MUCH HOTTER AND DRIER WEATHER WILL BEGIN TO IMPACT  
THE SITE SUNDAY WITH TEMPERATURES WARMING FURTHER ON MONDAY.  
 
   
SATURDAY
 
 
SKY/WEATHER.........A FEW MORNING CLOUDS. OTHERWISE, SUNNY.  
CWR.................0 PERCENT.  
CHANCE OF PCPN......0 PERCENT.  
LAL.................1.  
MAX TEMPERATURE.....79-81.  
MIN HUMIDITY........25-30 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......BECOMING UPSLOPE 1 TO 3 MPH AFTER 0900 BEFORE  
BECOMING NORTH-NORTHWEST 4 TO 6 MPH WITH GUSTS  
TO 12 MPH AFTER 1300.  
RIDGETOP...........BECOMING UPSLOPE 2 TO 4 MPH AFTER 0900 BEFORE  
BECOMING NORTH-NORTHWEST 7 TO 9 MPH WITH GUSTS  
TO 18 MPH AFTER 1300.  
MIXING HEIGHT.......BECOMING 4000 FT AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....NORTH 10 TO 15 MPH.  
HAINES INDEX(HIGH)..4 (LOW).  
HAINES INDEX (MID)..5 (MODERATE).  
RAINFALL AMOUNT.....0.00 INCHES.  
 
   
SATURDAY NIGHT
 
 
SKY/WEATHER.........CLEAR.  
CWR.................0 PERCENT.  
CHANCE OF PCPN......0 PERCENT.  
LAL.................1.  
MIN TEMPERATURE.....52-54.  
MAX HUMIDITY........85-90 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......NORTH-NORTHWEST 3 TO 5 MPH WITH GUSTS TO 10 MPH IN THE  
EVENING BECOMING DRAINAGE LESS THAN 3 MPH AFTER  
2200.  
RIDGETOP...........NORTH-NORTHWEST 6 TO 8 MPH WITH GUSTS TO 16 MPH IN THE  
EVENING BECOMING DRAINAGE LESS THAN 3 MPH AFTER  
2300.  
MIXING HEIGHT.......BECOMING LESS THAN 500 FT AGL.  
TRANSPORT WINDS.....NORTH 5 TO 10 MPH BECOMING LESS THAN 5 MPH  
AFTER MIDNIGHT.  
HAINES INDEX(HIGH)..5 (MODERATE).  
HAINES INDEX (MID)..5 (MODERATE).  
RAINFALL AMOUNT.....0.00 INCHES.  
 
   
SUNDAY
 
 
SKY/WEATHER.........SUNNY.  
CWR.................0 PERCENT.  
CHANCE OF PCPN......0 PERCENT.  
LAL.................1.  
MAX TEMPERATURE.....87-89.  
MIN HUMIDITY........20-25 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......BECOMING UPSLOPE 1 TO 3 MPH AFTER 0900 BEFORE  
BECOMING NORTH-NORTHWEST 3 TO 5 MPH WITH GUSTS  
TO 10 MPH AFTER 1300.  
RIDGETOP...........BECOMING UPSLOPE 2 TO 4 MPH AFTER 0900 BEFORE  
BECOMING NORTH-NORTHWEST 5 TO 7 MPH WITH GUSTS  
TO 14 MPH AFTER 1300.  
MIXING HEIGHT.......BECOMING 5000 FT AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....NORTH 5 TO 10 MPH.  
HAINES INDEX(HIGH)..5 (MODERATE).  
HAINES INDEX (MID)..5 (MODERATE).  
RAINFALL AMOUNT.....0.00 INCHES.  
 

 
 
FORECASTER...NEUMAN  
REQUESTED BY...KYLE KAUPP  
TYPE OF REQUEST...WILDFIRE  
.TAG 1812866.3/PQR  
.DELDT 07/20/18  
.EMAIL KYLE.F.KAUPP@OREGON.GOV  
 
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