739  
FNUS75 KBYZ 211843  
FWSBYZ  
 
SPOT FORECAST FOR VICTOR...MILES CITY INTERAGENCY DISPATCH  
NATIONAL WEATHER SERVICE BILLINGS MT  
1243 PM MDT WED AUG 21 2019  
 
FORECAST IS BASED ON FORECAST START TIME OF 1300 MDT ON AUGUST 21.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
   
DISCUSSION
 
 
CONDITIONS WILL REMAIN SIMILAR TO THE OBSERVATION THROUGH THE  
REST OF TODAY, WITH SOUTHEAST WINDS AND CLEAR SKIES. THERE'S A  
VERY SMALL CHANCE FOR AN ISOLATED STORM LATE THIS EVENING THAT MAY  
BRING ABOUT ERRATIC WINDS. WINDS WILL SLIGHTLY PICK UP OVERNIGHT,  
BUT STAY SOUTHEASTERLY AT 10 TO 15 MPH. MINIMUM RH VALUES WILL  
CONTINUE TO BE LOW 30S ON THURSDAY, WITH TEMPERATURES REACHING THE  
LOW 90S. A COLD FRONT WILL PASS THROUGH THURSDAY EVENING,  
BRINGING ABOUT AN ISOLATED CHANCE FOR THUNDERSTORMS AND STRONG,  
ERRATIC WINDS. THE FRONTAL PASSAGE WILL SHIFT WINDS TO THE  
NORTHEAST.  
   
REST OF TODAY
 
 
SKY/WEATHER.........SUNNY.  
LAL.................1...NO THUNDERSTORMS.  
MAX TEMPERATURE.....88-92.  
MIN HUMIDITY........30-35 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHEAST WINDS 5 TO 10 MPH.  
RIDGETOP...........SOUTHWEST AROUND 10 MPH.  
MIXING HEIGHT.......INCREASING TO 6900 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST AROUND 10 MPH.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
CWR.................3 PERCENT.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY.  
LAL.................1...NO THUNDERSTORMS.  
MIN TEMPERATURE.....59-63.  
MAX HUMIDITY........86-90 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHEAST WINDS 10 TO 15 MPH.  
RIDGETOP...........SOUTH AROUND 25 MPH.  
MIXING HEIGHT.......DECREASING TO 100 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST AROUND 15 MPH.  
CWR.................4 PERCENT.  
   
THURSDAY
 
 
SKY/WEATHER.........SUNNY. SCATTERED SHOWERS AND THUNDERSTORMS IN  
THE AFTERNOON WITH A FRONTAL PASSAGE.  
LAL.................3...9 TO 15 STRIKES/15 MIN/CELL.  
MAX TEMPERATURE.....92-96.  
MIN HUMIDITY........29-33 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHEAST WINDS 8 TO 12 MPH. GUSTY AND ERRATIC  
WINDS EXPECTED NEAR THUNDERSTORMS IN THE  
AFTERNOON. FRONT IN THE EVENING WILL SHIFT  
WINDS TO THE NORTHEAST AT 5 TO 10 MPH.  
RIDGETOP...........SOUTHEAST AROUND 15 MPH.  
MIXING HEIGHT.......INCREASING TO 6400 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST AROUND 11 MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
CWR.................13 PERCENT.  
 

 
FORECASTER...VERTZ/REIMER  
REQUESTED BY...KELSEY PLUHAR  
TYPE OF REQUEST...WILDFIRE  
.TAG 1914054.2/BYZ  
.DELDT 08/21/19  
.FORMATTERVERSION 1.0.26  
.EMAIL MTMCC@FIRENET.GOV  
 
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