630  
FNUS75 KREV 211633  
FWSREV  
 
SPOT FORECAST FOR TRANSITION RX BURN...USFS TAHOE NF  
NATIONAL WEATHER SERVICE RENO NV  
933 AM PDT THU OCT 21 2021  
 
FORECAST IS BASED ON IGNITION TIME OF 1000 PDT ON OCTOBER 21.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL  
WEATHER SERVICE IN RENO.  
   
DISCUSSION
 
 
* RAIN SHOWERS TODAY.  
 
* HEAVIER RAIN FRIDAY MORNING. SOME SNOW POSSIBLE.  
 
* STRONG ATMOSPHERIC RIVER STORM SATURDAY NIGHT INTO MONDAY. HEAVY  
RAIN AND STRONG WINDS SUNDAY WITH TREE FALLS AND LOCALIZED  
FLOODING. SNOW POSSIBLE BY MONDAY MORNING.  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. 80% CHANCE OF RAIN.  
TEMPERATURE.........MAX 50-55.  
RH..................MIN 70-75%.  
20-FOOT WINDS.......SOUTHWEST WINDS 6-12 MPH. GUSTS NEAR 30 MPH FOR  
EXPOSED RIDGELINES.  
LAL.................1.  
CHC WETTING RAIN....50%.  
MIXING HEIGHT.......1700-2300 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 20-25 MPH.  
VENTILATION.........GOOD.  
HAINES INDEX........2.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY. 50% CHANCE OF RAIN.  
TEMPERATURE.........MIN 35-40.  
RH..................MAX 100%.  
20-FOOT WINDS.......SOUTH WINDS 6-12 MPH. GUSTS NEAR 30 MPH FOR  
EXPOSED RIDGELINES.  
LAL.................1.  
CHC WETTING RAIN....15%.  
MIXING HEIGHT.......1500-2000 FT AGL.  
TRANSPORT WINDS.....SOUTH 25 MPH.  
VENTILATION.........GOOD.  
HAINES INDEX........2.  
   
FRIDAY
 
 
SKY/WEATHER.........CLOUDY. 95% CHANCE OF RAIN, HEAVY AT TIMES IN  
THE MORNING. RAIN MAY TURN TO SNOW IN THE LATE  
MORNING OR EARLY AFTERNOON.  
TEMPERATURE.........MAX 40-45.  
RH..................MIN 75-80%.  
20-FOOT WINDS.......SOUTH WINDS 10-15 MPH. GUSTS NEAR 40 MPH FOR  
EXPOSED RIDGELINES.  
LAL.................1.  
CHC WETTING RAIN....100%.  
MIXING HEIGHT.......1900-2800 FT AGL.  
TRANSPORT WINDS.....SOUTH 20-30 MPH.  
VENTILATION.........GOOD.  
HAINES INDEX........2.  
 

 
FORECASTER...BRONG  
REQUESTED BY...FRANK BOJORQUEZ  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2119809.1/REV  
.DELDT 10/21/21  
.FORMATTERVERSION 2.0.0  
.EMAIL FRANK.BOJORQUEZ@USDA.GOV  
 
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