799  
FNUS76 KHNX 180336  
FWSHNX  
 
SPOT FORECAST FOR HUMELAKE PILE BURN PLAIN LANDSLIDE C.G....USFS  
NATIONAL WEATHER SERVICE HANFORD CA  
736 PM PST SAT FEB 17 2018  
 
FORECAST IS BASED ON IGNITION TIME OF 0800 PST ON FEBRUARY 18.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
A LOW PRESSURE SYSTEM WILL APPROACH THE BURN AREA BY SUNDAY  
AFTERNOON AND BRING A CHANCE OF SNOW SHOWERS THROUGH WASHINGTON'S  
BIRTHDAY. ALSO EXPECT CLEARING AND MUCH COLDER TEMPERATURES BY  
MONDAY NIGHT.  
   
SUNDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY IN THE MORNING THEN BECOMING  
MOSTLY CLOUDY BY THE AFTERNOON. A 40  
PERCENT CHANCE OF SNOW LATE IN THE  
AFTERNOON.  
MAX TEMPERATURE.....AROUND 33 AT 0800 PST, RISING TO 45-48.  
MIN HUMIDITY........45-49 PERCENT.  
EYE LEVEL WINDS.....DOWNSLOPE 1-4 MPH UNTIL 1000 PST,  
INCREASING TO WESTERLY 5-8 MPH WITH GUSTS  
AROUND 12 MPH BY AFTERNOON.  
SURROUNDING RIDGE...SOUTHEAST 2-4 MPH IN THE MORNING,  
BECOMING SOUTHWEST 6-12 MPH BY THE  
AFTERNOON.  
MIXING HEIGHT.......AROUND 500 FT AGL IN THE MORNING,  
RISING TO 4500 FT AGL BY THE AFTERNOON.  
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH.  
   
SUNDAY NIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY. CHANCE OF SNOW IN THE EVENING,  
THEN CHANCE OF SNOW SHOWERS AFTER MIDNIGHT.  
CHANCE OF PRECIPITATION 40 PERCENT.  
MIN TEMPERATURE.....14-17.  
MAX HUMIDITY........95-100 PERCENT.  
EYE LEVEL WINDS.....WESTERLY 5-8 MPH. GUSTS AROUND 12 MPH.  
SURROUNDING RIDGE...WEST 7-10 MPH. GUSTS AROUND 15 MPH.  
MIXING HEIGHT.......LOWERING TO 2500 FT AGL OVERNIGHT.  
TRANSPORT WINDS.....WEST AROUND 8 MPH.  
   
WASHINGTONS BIRTHDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. A 30 PERCENT CHANCE OF SNOW  
SHOWERS.  
MAX TEMPERATURE.....24-27.  
MIN HUMIDITY........55-60 PERCENT.  
EYE LEVEL WINDS.....WESTERLY 6-10 MPH. GUSTS AROUND 15 MPH.  
SURROUNDING RIDGE...WEST 9-13 MPH. GUSTS AROUND 20 MPH.  
MIXING HEIGHT.......AROUND 3000 FT AGL IN THE MORNING,  
RISING TO 7000 FT AGL BY THE AFTERNOON.  
TRANSPORT WINDS.....WEST AROUND 11 MPH.  
 

 
FORECASTER...OCHS  
REQUESTED BY...PERRY PURDY  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1802103.0/HNX  
 
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