763  
FNUS75 KBYZ 071804  
FWSBYZ  
 
SPOT FORECAST FOR IDP TEST - DELAY REQUEST...NWS  
NATIONAL WEATHER SERVICE BILLINGS MT  
1204 PM MDT TUE MAY 7 2024  
 
FORECAST IS BASED ON IGNITION TIME OF 1700 MDT ON MAY 07.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
   
..HIGH WIND WARNING IN EFFECT UNTIL MIDNIGHT MDT TONIGHT
 
 
   
DISCUSSION
 
 
   
REST OF TODAY
 
 
SKY/WEATHER.........CLOUDY. CHANCE OF RAIN.  
CWR.................29 PERCENT.  
LAL.................1...NO THUNDERSTORMS.  
MAX TEMPERATURE.....49-53.  
MIN HUMIDITY........40-44 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......BREEZY. WEST WINDS AROUND 29 MPH WITH GUSTS TO  
AROUND 43 MPH.  
MIXING HEIGHT.......6200 FT AGL.  
TRANSPORT WINDS.....WEST AROUND 41 MPH.  
 
TIME (MDT) 5PM  
SKY (%).........92  
WEATHER COV.....CHC  
WEATHER TYPE....RN  
TSTM COV........  
TEMP............48  
RH..............56  
20 FT WIND DIR..W  
20 FT WIND SPD..29  
20 FT WIND GUST.43  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY. RAIN LIKELY IN THE EVENING, THEN RAIN  
OVERNIGHT.  
CWR.................81 PERCENT.  
LAL.................1...NO THUNDERSTORMS.  
MIN TEMPERATURE.....36-40.  
MAX HUMIDITY........92-96 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......BREEZY. NORTHWEST WINDS 20 TO 29 MPH DECREASING  
TO AROUND 19 MPH EARLY IN THE MORNING. GUSTS UP  
TO 52 MPH.  
MIXING HEIGHT.......6200 FT AGL EARLY IN THE EVENING DECREASING TO  
900 FT AGL OVERNIGHT.  
TRANSPORT WINDS.....NORTHWEST 33 TO 41 MPH DECREASING TO 25 TO 31  
MPH OVERNIGHT.  
 
TIME (MDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........93 92 95 96 96 97 94 92 97 95 97 97  
WEATHER COV.....LKY LKY LKY LKY LKY LKY DEF DEF DEF DEF DEF DEF  
WEATHER TYPE....RN RN RN RN RN RN RN RN RN RN RN RN  
TSTM COV........  
TEMP............46 45 43 42 41 41 40 40 40 40 40 39  
RH..............62 63 68 68 71 73 76 79 79 83 84 86  
20 FT WIND DIR..W W W W W W W W NW NW NW NW  
20 FT WIND SPD..29 29 29 29 28 28 27 25 23 21 20 19  
20 FT WIND GUST.42 42 41 41 39 39 38 36 33 30 29 28  
   
WEDNESDAY
 
 
SKY/WEATHER.........CLOUDY. RAIN.  
CWR.................87 PERCENT.  
LAL.................1...NO THUNDERSTORMS.  
MAX TEMPERATURE.....50-54.  
MIN HUMIDITY........70-74 PERCENT.  
WIND (20 FT)........  
SLOPE/VALLEY.......NORTHWEST WINDS 14 TO 19 MPH WITH GUSTS TO  
AROUND 26 MPH.  
MIXING HEIGHT.......900 FT AGL EARLY IN THE MORNING INCREASING TO  
2200 FT AGL IN THE AFTERNOON.  
TRANSPORT WINDS.....NORTHWEST AROUND 25 MPH SHIFTING TO THE NORTH  
IN THE AFTERNOON.  
 
TIME (MDT) 6 AM 9 AM NOON 3 PM  
SKY (%).........97 95 94 94  
WEATHER COV.....DEFNTE DEFNTE DEFNTE DEFNTE  
WEATHER TYPE....RAIN RAIN RAIN RAIN  
TSTM COV........  
TEMP............40 42 46 50  
RH..............90 91 84 78  
20 FT WIND......NW 19G26 NW 14G18 NW 16G21 N 16G19  
 

 
FORECASTER...MIDDENDORF  
REQUESTED BY...VIRGIL MIDDENDORF  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2490308.1/BYZ  
.DELDT 05/07/24  
.FORMATTERVERSION 2.0.0  
.EMAIL VIRGIL.MIDDENDORF@NOAA.GOV  
 
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