786  
FNUS75 KREV 221006  
FWSREV  
 
SPOT FORECAST FOR BUCK UNIT 4...USFS  
NATIONAL WEATHER SERVICE RENO NV  
306 AM PDT SUN APR 22 2018  
 
FORECAST IS BASED ON IGNITION TIME OF 0600 PDT ON APRIL 22.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL  
WEATHER SERVICE IN RENO.  
   
DISCUSSION
 
 
WELL ABOVE NORMAL TEMPERATURES WILL CONTINUE THROUGH THE WEEK  
AHEAD. DRY CONDITIONS CONTINUE THROUGH MIDWEEK WHEN AN APPROACHING  
SYSTEM WILL BRING CHANCES FOR SHOWERS AND THUNDERSTORMS FOR THE  
SECOND HALF OF THE WEEK AND POSSIBLY INTO NEXT WEEKEND.  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
TEMPERATURE.........40 AT IGNITION...MAX 65.  
RH..................75% AT IGNITION...MIN 22-27%.  
20-FOOT WINDS.......WINDS LIGHT AND VARIABLE AT IGNITION BECOMING  
WEST 8-12 MPH BETWEEN NOON AND 2 PM INCREASING  
TO 13-18 MPH WITH GUSTS TO 25 MPH LATE IN THE  
AFTERNOON.  
CHC WETTING RAIN....0%.  
MIXING HEIGHT.......500-900 FT AGL AT IGNITION INCREASING TO 7100 FT  
AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....LIGHT WINDS BECOMING SOUTHWEST 10 TO 20 MPH IN  
THE AFTERNOON.  
VENTILATION.........FAIR INCREASING TO VERY GOOD IN THE AFTERNOON.  
HAINES INDEX........3.  
   
TONIGHT
 
 
SKY/WEATHER.........CLEAR.  
TEMPERATURE.........MIN 35.  
RH..................MAX 63-68%.  
20-FOOT WINDS.......NORTHWEST WINDS 8-13 MPH SHIFTING TO THE  
EAST 5-10 MPH AFTER MIDNIGHT.  
CHC WETTING RAIN....0%.  
MIXING HEIGHT.......6900 FT AGL DECREASING TO 900 FT AGL AFTER  
MIDNIGHT.  
TRANSPORT WINDS.....WEST NORTHWEST 10 TO 20 MPH IN THE EVENING  
BECOMING EAST UP TO 10 MPH AFTER MIDNIGHT.  
VENTILATION.........EXCELLENT DECREASING TO POOR AFTER MIDNIGHT.  
HAINES INDEX........3.  
   
MONDAY
 
 
SKY/WEATHER.........SUNNY THEN BECOMING PARTLY CLOUDY.  
TEMPERATURE.........MAX 62.  
RH..................MIN 26%.  
20-FOOT WINDS.......EAST WINDS 7-12 MPH.  
CHC WETTING RAIN....0%.  
MIXING HEIGHT.......5000-5600 FT AGL.  
TRANSPORT WINDS.....EAST WINDS AROUND 10 MPH SURFACE THROUGH ABOUT  
3500 AGL BECOMING SOUTHWEST AROUND 10 MPH ABOVE  
3500 FEET AGL.  
VENTILATION.........FAIR.  
HAINES INDEX........3.  
 

 
FORECASTER...HOON/JOHNSON  
REQUESTED BY...CHRIS VOELKER  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1807079.0/REV  
.EMAIL CVOELKER@FS.FED.US  
 
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