761  
FNUS73 KGRR 180757  
FWSGRR  
 
SPOT FORECAST FOR BASS RX BURN...MIDNR  
NATIONAL WEATHER SERVICE GRAND RAPIDS MI  
357 AM EDT SAT MAY 18 2024  
 
FORECAST IS BASED ON IGNITION TIME OF 1200 EDT ON MAY 18.  
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
 
 
IT WILL BE MOSTLY SUNNY AND VERY WARM TODAY WITH HIGH TEMPERATURES  
REACHING THE LOWER 80S WITH MINIMUM RELATIVE HUMIDITY VALUES  
OF AROUND 45 PERCENT. WINDS WILL BE RATHER LIGHT OUT OF THE  
SOUTHWEST AT UNDER 10 MPH.  
 
   
REST OF TODAY
 
 
SKY/WEATHER.........SUNNY (10-20 PERCENT).  
TEMPERATURE.........76 AT IGNITION...MAX 81.  
RH..................56 PERCENT AT IGNITION...MIN 45 PERCENT.  
WIND (20 FT)........WINDS SOUTHWEST AT 6 MPH AT  
IGNITION...OTHERWISE SOUTHWEST WINDS 5 TO 7  
MPH.  
MIXING HEIGHT.......4200 FT AGL AT IGNITION...OTHERWISE 5800 FT  
AGL.  
MIXING WINDS........SOUTHWEST 7 TO 9 MPH.  
SMOKE DISPERSAL.....380 /GOOD/ AT IGNITION. MAX...500 /GOOD/.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH AT IGNITION...MAX 5.  
 
TIME (EDT) NOON 2 PM 4 PM 6 PM 8 PM 10 PM  
SKY (%).........9 15 16 11 9 8  
WEATHER COV.....  
WEATHER TYPE....NONE NONE NONE NONE NONE NONE  
TSTM COV........  
TEMP............76 79 80 80 77 70  
RH..............56 49 45 45 50 63  
20 FT WIND......SW 6 W 7 W 6 SW 5 S 3 S 3  
20 FT WIND GUST.8 9 9 8 6 5  
MIX HGT (FT)....4200 5800 5100 3600 600 400  
MIXING WIND.....SW 9 SW 8 SW 8 SW 8 S 5 S 6  
HAINES INDEX....4 5 5 5 4 4  
SMOKE DISPRSL...380 470 410 290 30 20  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT).  
TEMPERATURE.........MIN 62.  
RH..................MAX 81 PERCENT.  
WIND (20 FT)........LIGHT WINDS BECOMING SOUTH AROUND 5 MPH LATE AT  
NIGHT, THEN SHIFTING TO THE SOUTHWEST 5 TO 6  
MPH TOWARD DAYBREAK.  
MIXING HEIGHT.......400 FT AGL.  
MIXING WINDS........SOUTH 5 TO 10 MPH SHIFTING TO THE WEST AROUND 9  
MPH TOWARD DAYBREAK.  
SMOKE DISPERSAL.....20 (POOR).  
HAINES INDEX........3 TO 4 OR VERY LOW TO LOW POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
   
SUNDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT).  
TEMPERATURE.........MAX 80.  
RH..................MIN 47 PERCENT.  
WIND (20 FT)........WEST WINDS AROUND 5 MPH EARLY IN THE MORNING  
BECOMING LIGHT, THEN BECOMING WEST 5 TO 6 MPH  
BECOMING LIGHT.  
MIXING HEIGHT.......3000 FT AGL.  
MIXING WINDS........NORTHWEST 7 TO 12 MPH.  
SMOKE DISPERSAL.....50 (POOR) EARLY IN THE MORNING INCREASING TO  
240 (FAIR) IN THE AFTERNOON.  
HAINES INDEX........4 TO 5 OR LOW TO MODERATE POTENTIAL FOR LARGE  
PLUME DOMINATED FIRE GROWTH.  
 

 
FORECASTER...LAURENS  
REQUESTED BY...TOM BARNES  
TYPE OF REQUEST...PRESCRIBED  
.TAG 2414536.0/GRR  
.DELDT 05/18/24  
.FORMATTERVERSION 2.0.0  
.EMAIL BARNEST2@MICHIGAN.GOV  
 
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