985  
FNUS76 KOTX 192151  
FWSOTX  
 
SPOT FORECAST FOR WILLIAMS FLATS...COLVILLE BIA  
NATIONAL WEATHER SERVICE SPOKANE WA  
251 PM PDT MON AUG 19 2019  
 
FORECAST IS BASED ON FORECAST START TIME OF 0600 PDT ON AUGUST 20.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
EXPECT WARM DRY CONDITIONS WITH POOR TO MODERATE OVERNIGHT RELATIVE  
HUMIDITY RECOVERY ON MID-SLOPES AND RIDGES TUESDAY AND TUESDAY NIGHT.  
WEDNESDAY WILL CONTINUE TO BE WARM AND DRY, BUT WE ARE EXPECTING A  
COLD FRONT TO MOVE ACROSS THE BURN AREA WEDNESDAY EVENING. SOUTHWEST  
WINDS WILL BE ON THE INCREASE AHEAD OF THE FRONT WEDNESDAY AFTERNOON  
CONINTUE THROUGH THE NIGHT. WHILE SHOWERS ARE EXPECTED AMOUNTS WILL  
BE VERY LIGHT. THURSDAY WILL BE 5-10 DEGREES COOLER WITH BREEZY SOUTHWEST  
WINDS.  
   
TUESDAY
 
 
SKY/WEATHER.........SUNNY.  
CWR.................0 PERCENT.  
LAL.................1.  
MAX TEMPERATURE.....89.  
MIN HUMIDITY........14-17 PERCENT.  
WIND (20 FT)........EAST-SOUTHEAST WINDS 6 TO 8 MPH.  
MIXING HEIGHT.......INCREASING TO 4000 FT AGL AFTER 1030.  
TRANSPORT WINDS.....SOUTHEAST 7 TO 10 MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
   
TUESDAY NIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR.  
CWR.................0 PERCENT.  
LAL.................1.  
MIN TEMPERATURE.....61.  
MAX HUMIDITY........55 PERCENT.  
WIND (20 FT)........SOUTHEAST WINDS 5 TO 8 MPH...BECOMING SOUTHWEST  
4 TO 7 MPH AFTER 0500  
MIXING HEIGHT.......DECREASING TO NEAR THE SURFACE 2100.  
TRANSPORT WINDS.....SOUTH AROUND 6 MPH.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
   
WEDNESDAY
 
 
SKY/WEATHER.........PARTLY SUNNY. CHANCE OF SHOWERS LATE IN THE  
AFTERNOON. A BETTER CHANCE WEDNESDAY NIGHT  
CWR.................LESS THAN 10 PERCENT WEDNESDAY NIGHT.  
LAL.................1.  
MAX TEMPERATURE.....84.  
MIN HUMIDITY........21 PERCENT.  
WIND (20 FT)........SOUTH WINDS 3 TO 6 MPH IN THE MORNING SHIFTING  
TO THE SOUTHWEST 10 TO 12 MPH AFTER 1600.  
MIXING HEIGHT.......INCREASING TO 6600 FT AGL AFTER 2030.  
TRANSPORT WINDS.....SOUTHWEST AROUND 12 MPH.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
 

 
FORECASTER...BT  
REQUESTED BY...DEBBIE PLUMMER  
TYPE OF REQUEST...WILDFIRE  
.TAG 1913859.4/OTX  
.DELDT 08/19/19  
.FORMATTERVERSION 1.0.26  
.EMAIL DPLUMMER@BLM.GOV  
 
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