168  
FNUS73 KGRR 271822  
FWSGRR  
 
SPOT FORECAST FOR PRARIE BURN...US NATIONAL GUARD  
NATIONAL WEATHER SERVICE GRAND RAPIDS MI  
122 PM EST MON NOV 27 2017  
 
FORECAST IS BASED ON IGNITION TIME OF 1400 EST ON NOVEMBER 27.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
 
PLEASE CONTACT OUR OFFICE AT (616) 949-5150, IF YOU HAVE QUESTIONS  
OR CONCERNS WITH THIS FORECAST.  
   
DISCUSSION
 
 
MIXING HEIGHTS/INVERSION HEIGHTS WILL MAX OUT AROUND 1500-1900 THROUGH  
MAX HEATING, AND WILL COME DOWN TO UNDER 100 FT THIS EVENING AROUND DARK.  
INVERSIONS WILL INCREASE A LITTLE OVERNIGHT AS BETTER MIXING TAKES PLACE  
WITH WINDS INCREASING THROUGH THE NIGHT. THEN INVERSIONS WILL LIKELY REMAIN  
AROUND 100-200 FT AGL THROUGH THE NIGHT.  
 
   
REST OF TODAY
 
 
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT).  
TEMPERATURE.........52 AT 1400...MAX 54.  
RH..................55 PERCENT AT IGNITION...MIN 52 PERCENT.  
WIND (20 FT)........WINDS EAST AT 7 MPH AT IGNITION...OTHERWISE  
BECOMING SOUTHEAST WINDS 6 TO 10 MPH.  
MIXING HEIGHT.......1500 FT AGL AT IGNITION...OTHERWISE MAX 1500-1900  
FT AGL.  
MIXING WINDS........SOUTHEAST 10 TO 15 MPH.  
SMOKE DISPERSAL.....150-250 /POOR TO FAIR/ AT IGNITION. MAX...250 /FAIR/.  
HAINES INDEX........3 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH AT IGNITION...MAX 3.  
 
TIME (EST) 2 PM 4 PM 6 PM 8 PM 10 PM MIDNGT  
SKY (%).........60 60 60 50 50 30  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TSTM COV........  
TEMP............52 54 49 47 47 47  
RH..............55 52 59 64 64 64  
20 FT WIND......E 9 SE 9 SE 9 S 10 S 11 S 13  
20 FT WIND GUST. 11 12 18  
MIX HGT (FT)....1500 1700 200 200 300 300  
HAINES INDEX....3 3 3 3 3 3  
SMOKE DISPERSAL 150 200 100 50 60 90  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (25-30 PERCENT).  
TEMPERATURE.........MIN 45.  
RH..................MAX 70 PERCENT.  
WIND (20 FT)........SOUTH WINDS 10 TO 15 MPH. GUSTS UP TO 25 MPH  
POSSIBLE AFTER MIDNIGHT.  
MIXING HEIGHT.......AROUND 100 FT AGL.  
MIXING WINDS........SOUTH 10 TO 15 MPH INCREASING TO AROUND 20 TO  
25 MPH EARLY IN THE MORNING.  
SMOKE DISPERSAL.....0-100 (POOR).  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
 

 
FORECASTER...JERUZAL  
REQUESTED BY...MICHELE RICHARDS  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1719210.0/GRR  
.EMAIL EARTHVIVA@YAHOO.COM  
 
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