188  
FNUS75 KFGZ 261631  
FWSFGZ  
 
SPOT FORECAST FOR KACHINA RX...CNF COCONINO NF  
NATIONAL WEATHER SERVICE FLAGSTAFF AZ  
931 AM MST WED APR 26 2017  
 
FORECAST IS BASED ON IGNITION TIME OF 1000 MST ON APRIL 26.  
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
DRY AND BREEZY CONDITIONS ARE EXPECTED TODAY WITH NEAR SEASONAL  
TEMPERATURES. CLOUD COVER WILL MOVE INTO AREA FROM THE NORTHWEST  
AS THE DAY PROGRESSES. WINDS WILL INCREASE AND CHANGE TO A MORE  
WESTERLY FLOW AS MORNING INVERSION BREAKS DOWN. WINDS WILL REMAIN  
GUSTY THROUGH THE AFTERNOON HOURS AND SHOULD SLOWLY DECREASE  
OVERNIGHT. LIGHT WINDS AND POOR VENTILATION ARE POSSIBLE IN THE  
EARLY MORNING HOURS THURSDAY.  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY.  
CHANCE OF PCPN......0 PERCENT.  
MAX TEMPERATURE.....AROUND 63.  
MIN HUMIDITY........17 PERCENT.  
WIND (20 FT)........NORTHWEST WINDS AROUND 5 MPH INCREASING TO WEST  
AROUND 15 MPH IN THE AFTERNOON. GUSTS UP TO 30  
MPH.  
LAL.................1.  
HAINES INDEX........2 VERY LOW.  
MAX VENT RATE.......EXCELLENT (200600 KNOT-FT).  
CLEARING INDEX......2006.  
MIXING HEIGHT.......2600 FT AGL IN THE MORNING INCREASING TO 6300  
FT AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....NORTH 5 TO 10 KNOTS SHIFTING TO THE WEST EARLY  
IN THE AFTERNOON, THEN INCREASING TO AROUND 20  
KNOTS LATE IN THE AFTERNOON.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
CHANCE OF PCPN......0 PERCENT.  
MIN TEMPERATURE.....AROUND 37.  
MAX HUMIDITY........61 PERCENT.  
WIND (20 FT)........SOUTHWEST WINDS 10 TO 15 MPH WITH GUSTS UP TO  
30 MPH.  
LAL.................1.  
HAINES INDEX........2 VERY LOW.  
MIN VENT RATE.......POOR (1400 KNOT-FT).  
CLEARING INDEX......14.  
MIXING HEIGHT.......5100 FT AGL EARLY IN THE EVENING DECREASING TO  
500 FT AGL IN THE LATE EVENING AND OVERNIGHT.  
TRANSPORT WINDS.....WEST AROUND 20 KNOTS SHIFTING TO THE SOUTHWEST  
10 TO 15 KNOTS IN THE LATE EVENING AND  
OVERNIGHT.  
   
THURSDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
CHANCE OF PCPN......0 PERCENT.  
MAX TEMPERATURE.....AROUND 65.  
MIN HUMIDITY........17 PERCENT.  
WIND (20 FT)........WEST WINDS 10 TO 15 MPH WITH GUSTS UP TO 35  
MPH.  
LAL.................1.  
HAINES INDEX........3 VERY LOW.  
MAX VENT RATE.......EXCELLENT (189300 KNOT-FT).  
CLEARING INDEX......1893.  
MIXING HEIGHT.......2200 FT AGL INCREASING TO 7200 FT AGL.  
TRANSPORT WINDS.....WEST 10 TO 15 KNOTS INCREASING TO 20 TO 25  
KNOTS IN THE AFTERNOON.  
 

 
FORECASTER...SUK  
REQUESTED BY...COREY WILSON  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1707818.0/FGZ  
.EMAIL CWILSON@FS.FED.US  
 
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