566  
FNUS73 KGRR 221417  
FWSGRR  
 
SPOT FORECAST FOR WINDING TRAIL...MDNR  
NATIONAL WEATHER SERVICE GRAND RAPIDS MI  
1017 AM EDT MON MAY 22 2017  
 
FORECAST IS BASED ON IGNITION TIME OF 1400 EDT ON MAY 22.  
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
 
AN UPPER TROUGH WILL COVER THE GREAT LAKES FOR THE NEXT  
COUPLE OF DAYS. SOME SUNSHINE TODAY WILL PROMOTE MIXING; LOOK FOR GUSTY  
WINDS.  
   
TODAY
 
 
SKY/WEATHER.........SUNNY (10-20 PERCENT) THEN BECOMING PARTLY  
SUNNY (50-60 PERCENT).  
TEMPERATURE.........65 AT IGNITION...MAX 68.  
RH..................45 PERCENT AT IGNITION...MIN 44 PERCENT.  
WIND (20 FT)........WINDS WEST AT 13 MPH AT IGNITION...OTHERWISE  
SOUTHWEST WINDS 7 TO 12 MPH. GUSTS UP TO 30  
MPH.  
MIXING HEIGHT.......4700 FT AGL AT IGNITION...OTHERWISE 5300-5800  
FT AGL.  
MIXING WINDS........WEST 21 TO 29 MPH SHIFTING TO THE SOUTHWEST 31  
TO 33 MPH LATE IN THE DAY.  
SMOKE DISPERSAL.....1500 /EXCELLENT/ AT IGNITION. MAX...1500  
/EXCELLENT/.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH AT IGNITION...MAX 4.  
 
TIME (EDT) 2 PM 4 PM 6 PM 8 PM 10 PM MIDNGT  
SKY (%).........31 29 55 70 84 91  
WEATHER COV..... CHANCE CHANCE CHANCE  
WEATHER TYPE....NONE NONE NONE RNSHWR RNSHWR RNSHWR  
TSTM COV........  
TEMP............65 67 68 67 62 59  
RH..............45 47 51 57 69 67  
20 FT WIND......W 10 SW 10 SW 10 SW 10 SW 8 SW 7  
20 FT WIND GUST.25 25 25 20 15 10  
MIX HGT (FT)....4700 5600 5700 4400 1600 200  
HAINES INDEX....3 4 4 4 3 3  
SMOKE DISPERSAL 1500 1500 1000 500 200 100  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). CHANCE OF RAIN  
SHOWERS.  
TEMPERATURE.........MIN 54.  
RH..................MAX 90 PERCENT.  
WIND (20 FT)........SOUTHWEST WINDS 6 TO 11 MPH.  
 

 
FORECASTER...93  
REQUESTED BY...DON KLINGLER  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1709866.0/GRR  
.EMAIL KLINGLERD@MICHIGAN.GOV  
 
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