246  
FNUS75 KREV 201152  
FWSREV  
 
SPOT FORECAST FOR LIONS FIRE...USFS  
NATIONAL WEATHER SERVICE RENO NV  
452 AM PDT MON AUG 20 2018  
 
FORECAST IS BASED ON FORECAST START TIME OF 0800 PDT ON AUGUST 20.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL  
WEATHER SERVICE IN RENO.  
   
..VERY DRY AIR ARRIVING TUESDAY NIGHT AND WEDNESDAY
 
 
   
DISCUSSION
 
 
A LOW PRESSURE SYSTEM OVER NORTHERN CALIFORNIA AND NORTHWEST  
NEVADA WILL BRING SLIGHTLY ENHANCED WINDS TODAY AND TUESDAY ALONG  
WITH A COOLER BUT DRIER AIRMASS. HUMIDITY RECOVERIES WILL WORSEN  
EACH MORNING WITH VERY DRY AIR FORECAST TO ARRIVE TUESDAY NIGHT  
INTO WEDNESDAY WHEN HUMIDITY LEVELS WILL BE AS LOW AS 10 PERCENT.  
   
MONDAY
 
 
SKY/WEATHER.........SUNNY. HAZE AND AREAS OF SMOKE.  
TEMPERATURE.........MAX 80-87 AT 6500-8000 FEET.  
MAX 70-80 AT 8000-9000 FEET.  
RH..................MIN 14-18% AT 6500-8000 FEET.  
MIN 18-23% AT 8000-9000 FEET.  
20-FOOT WINDS.......SOUTH-SOUTHWEST WINDS 7-14 MPH INCREASING  
TO 12-16 MPH WITH GUSTS TO AROUND 25 MPH  
IN THE AFTERNOON.  
LAL.................1.  
CHC WETTING RAIN....0%.  
MIXING HEIGHT.......2800 FT AGL INCREASING TO 9000 FT AGL IN THE  
AFTERNOON.  
TRANSPORT WINDS.....SOUTH WINDS AROUND 10 MPH BECOMING SOUTH  
AROUND 15 MPH IN THE AFTERNOON.  
VENTILATION.........MARGINAL INCREASING TO VERY GOOD IN THE  
AFTERNOON.  
HAINES INDEX........4-5.  
   
MONDAY NIGHT
 
 
SKY/WEATHER.........CLEAR. HAZE AND AREAS OF SMOKE.  
TEMPERATURE.........MIN 43-48 EXCEPT 50-54 IN THERMAL BELTS.  
RH..................MAX 50-60% EXCEPT 30-35% IN THERMAL BELTS.  
20-FOOT WINDS.......SOUTHWEST WINDS 10-15 MPH WITH GUSTS TO  
25 MPH IN THE EVENING. WINDS BECOMING  
DOWNSLOPE 2-5 MPH BY 2200 FOR AREAS  
BELOW THERMAL BELTS AND SOUTH TO SOUTHWEST  
8-14 MPH IN UPPER ELEVATIONS.  
LAL.................1.  
CHC WETTING RAIN....0%.  
MIXING HEIGHT.......8800 FT AGL DECREASING TO 200-500 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 10-15 MPH...BECOMING LIGHT BELOW  
THERMAL BELTS BY LATE EVENING.  
VENTILATION.........GOOD DECREASING TO POOR BY MIDNIGHT.  
HAINES INDEX........4.  
   
TUESDAY
 
 
SKY/WEATHER.........SUNNY. HAZE AND AREAS OF SMOKE.  
TEMPERATURE.........MAX 74-82 AT 6500-8000 FEET.  
MAX 66-74 AT 8000-9000 FEET.  
RH..................MIN 13-17% AT 6500-8000 FEET.  
MIN 17-22% AT 8000-9000 FEET.  
20-FOOT WINDS.......SOUTH-SOUTHWEST WINDS 7-14 MPH INCREASING  
TO 12-16 MPH WITH GUSTS TO AROUND 25 MPH  
IN THE AFTERNOON.  
LAL.................1.  
CHC WETTING RAIN....0%.  
MIXING HEIGHT.......2800 FT AGL INCREASING TO 9000 FT AGL IN THE  
AFTERNOON.  
TRANSPORT WINDS.....SOUTH WINDS AROUND 10 MPH BECOMING SOUTH  
AROUND 15 MPH IN THE AFTERNOON.  
VENTILATION.........MARGINAL INCREASING TO VERY GOOD IN THE  
AFTERNOON.  
HAINES INDEX........5.  
 

 
FORECASTER...HOHMANN  
REQUESTED BY...AIR RESOURCE ADVISOR  
TYPE OF REQUEST...WILDFIRE  
.TAG 1814767.0/REV  
.DELDT 08/20/18  
.EMAIL JLREED@FS.FED.US  
 
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