498  
FNUS75 KBYZ 261543  
FWSBYZ  
 
SPOT FORECAST FOR CROW AGENCY COMPARTMENT RX LAGOONS...CROW BIA FIRE  
NATIONAL WEATHER SERVICE BILLINGS MT  
943 AM MDT WED APR 26 2017  
 
FORECAST IS BASED ON IGNITION TIME OF 1000 MDT ON APRIL 26.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
   
DISCUSSION
 
 
EXPECT A DRIER AND WARMER DAY TODAY AHEAD OF ANOTHER DISTURBANCE  
WHICH WILL INCREASE SHOWER ACTIVITY LATE THIS AFTERNOON AND IN THE  
OVERNIGHT HOURS. IT WILL STILL BE COOL FOR LATE APRIL WITH LIGHT  
WINDS UNTIL LATE AFTERNOON WHEN THE AIRMASS WILL BECOME UNSTABLE  
WITH A FEW SHOWERS DEVELOPING. HUMIDITY MINIMUMS WILL BE HIGH  
TODAY AND REMAIN ABOVE 40 PERCENT. EXPECT CLOUD COVER TONIGHT WITH  
HIGH HUMIDITY AND MORE SHOWERS WITH THURSDAY LOOKING COOL WITH A  
GOOD CHANCE OF RECEIVING RAIN. BORSUM  
 
   
REST OF TODAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS IN THE  
AFTERNOON.  
LAL.................1...NO THUNDERSTORMS.  
MAX TEMPERATURE.....54-59.  
MIN HUMIDITY........45-50 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHEAST WINDS 5 TO 10 MPH.  
RIDGETOP...........WEST 5 TO 10 MPH.  
MIXING HEIGHT.......700 FT AGL LATE IN THE MORNING...INCREASING TO  
5600 FT AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....SOUTHEAST 5 TO 15 MPH.  
HAINES INDEX........3.  
CWR.................4 PERCENT.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY. ISOLATED RAIN SHOWERS IN THE  
EVENING...THEN SCATTERED RAIN SHOWERS  
OVERNIGHT.  
LAL.................1...NO THUNDERSTORMS.  
MIN TEMPERATURE.....35-40.  
MAX HUMIDITY........89-94 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHEAST WINDS 5 TO 10 MPH.  
RIDGETOP...........SOUTH 5 TO 15 MPH.  
MIXING HEIGHT.......5600 FT AGL IN THE EVENING...DECREASING TO 1100  
FT AGL OVERNIGHT.  
TRANSPORT WINDS.....SOUTHEAST 5 TO 15 MPH.  
CWR.................9 PERCENT.  
 

 
FORECASTER...BORSUM  
REQUESTED BY...TRACY SPANG  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1707810.0/BYZ  
.EMAIL KARL.BIGHAIR@BIA.GOV,RANDY.PRETTYONTOP@BIA.GOV  
 
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