701  
FNUS75 KFGZ 191903  
FWSFGZ  
 
SPOT FORECAST FOR SPRUCE PILES...FOREST SERVIVE  
NATIONAL WEATHER SERVICE FLAGSTAFF AZ  
1203 PM MST FRI JAN 19 2018  
 
FORECAST IS BASED ON IGNITION TIME OF 1200 MST ON JANUARY 19.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE  
NATIONAL WEATHER SERVICE IN FLAGSTAFF, AZ  
   
DISCUSSION
 
EXPECT INCREASING WIND SPEEDS THROUGH TODAY AS A  
COLD FRONT APPROACHES THE BURN SITE. BREEZY CONDITIONS TO CONTINUE  
TONIGHT. THE COLD FRONT SHOULD ARRIVE SATURDAY MORNING, WITH SEVERAL HOURS  
OF RAIN SHOWERS. SATURDAYS MAX TEMPERATURE SHOULD OCCURRING BY NOON.  
   
REST OF TODAY
 
 
SKY/WEATHER.........VARIABLE HIGH CLOUDS.  
CHANCE OF PCPN......0 PERCENT.  
MAX TEMPERATURE.....55 TO 58.  
MIN HUMIDITY........21 TO 24 PERCENT.  
WIND (20 FT)........SOUTHWEST WINDS AROUND 10 MPH WITH GUSTS UP TO 25  
MPH.  
LAL.................1.  
HAINES INDEX........2 VERY LOW.  
MAX VENT RATE.......GOOD (48600 KNOT-FT).  
CLEARING INDEX......486.  
MIXING HEIGHT.......2900 FT AGL.  
TRANSPORT WINDS.....SOUTH 15 TO 20 MPH.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY THEN BECOMING MOSTLY CLOUDY. RAIN  
SHOWERS LIKELY AFTER MIDNIGHT...BECOMING SNOW  
SHOWERS BY DAYBREAK.  
CHANCE OF PCPN......70 PERCENT.  
MIN TEMPERATURE.....34 TO 37.  
MAX HUMIDITY........75 TO 80 PERCENT.  
WIND (20 FT)........SOUTH WINDS 10 TO 15 MPH WITH GUSTS UP TO 30  
MPH.  
LAL.................1.  
HAINES INDEX........2 VERY LOW.  
MIN VENT RATE.......POOR (1000 KNOT-FT).  
CLEARING INDEX......10.  
MIXING HEIGHT.......1400 FT AGL.  
TRANSPORT WINDS.....SOUTH 15 TO 20 MPH DECREASING TO AROUND 10 MPH  
EARLY IN THE MORNING.  
   
SATURDAY
 
 
SKY/WEATHER.........CLOUDY. SNOW SHOWERS SHOWERS LIKELY THROUGH THE DAY.  
CHANCE OF PCPN......70 PERCENT.  
MAX TEMPERATURE.....35 TO 38.  
MIN HUMIDITY........55 TO 58 PERCENT.  
WIND (20 FT)........SOUTHWEST WINDS 15 TO 20 MPH WITH GUSTS UP TO  
35 MPH.  
LAL.................1.  
HAINES INDEX........3 VERY LOW.  
MAX VENT RATE.......EXCELLENT (131200 KNOT-FT).  
CLEARING INDEX......1312.  
MIXING HEIGHT.......2200 FT AGL UNTIL LATE AFTERNOON INCREASING TO  
4900 FT AGL LATE IN THE AFTERNOON.  
TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH INCREASING TO AROUND 25  
MPH LATE IN THE AFTERNOON.  
 

 
FORECASTER...STUBBLEFIELD  
REQUESTED BY...JOSH NUTTALL  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1800628.0/FGZ  
.EMAIL JDNUTTALL@FS.FED.US  
 
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