834  
FNUS73 KGRR 291034  
FWSGRR  
 
SPOT FORECAST FOR BISMUTH...MDNR  
NATIONAL WEATHER SERVICE GRAND RAPIDS MI  
634 AM EDT SAT APR 29 2017  
 
FORECAST IS BASED ON IGNITION TIME OF 1100 EDT ON APRIL 29.  
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
 
A LARGE AREA OF RAIN, WHICH IS AS CLOSE AS I-80 AT 6:30 AM  
WILL CONTINUE TO SLOWY MOVE NORTHWARD. THIS AREA OF RAIN SHOULD REACH THE  
THIS SITE BY 4 PM. UNTIL THEN IT SHOULD BE DRY BUT WINDS WILL BECOME BRISK  
FROM THE NORTHEAST AROUND 10 MPH WITH GUSTS TO 25 MPH BY AFTERNOON.  
   
TODAY
 
 
SKY/WEATHER.........CLOUDY (90-100 PERCENT). CHANCE OF RAIN  
SHOWERS. RAIN SHOWERS LATE IN THE DAY.  
TEMPERATURE.........52 AT IGNITION...MAX 54.  
RH..................63 PERCENT AT IGNITION...MIN 61 PERCENT.  
WIND (20 FT)........WINDS NORTHEAST AT 12 MPH AT  
IGNITION...OTHERWISE EAST WINDS 10 TO 15 MPH.  
GUSTS UP TO 25 MPH LATE IN THE DAY.  
MIXING HEIGHT.......2100 FT AGL AT IGNITION...OTHERWISE 2200-2700  
FT AGL.  
MIXING WINDS........NORTHEAST 14 TO 22 MPH SHIFTING TO THE EAST 24  
TO 30 MPH LATE IN THE DAY.  
SMOKE DISPERSAL.....300 /GOOD/ AT IGNITION. MAX...600 /EXCELLENT/.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH AT IGNITION...MAX 2.  
 
TIME (EDT) 11 AM 1 PM 3 PM 5 PM 7 PM 9 PM  
SKY (%).........94 96 100 100 100 100  
WEATHER COV..... S CHC CHANCE LIKELY DEFNTE DEFNTE  
WEATHER TYPE....NONE RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR  
TSTM COV........ CHANCE  
TEMP............52 54 53 51 50 48  
RH..............63 61 66 71 71 77  
20 FT WIND......NE 10 NE 10 NE 10 E 10 E 12 E 14  
20 FT WIND GUST.15 15 15 20 25 30  
MIX HGT (FT)....2100 2600 2300 1400 1800 2300  
HAINES INDEX....2 2 2 2 2 2  
SMOKE DISPERSAL 300 400 400 400 600 700  
   
TONIGHT
 
 
SKY/WEATHER.........CLOUDY (95-100 PERCENT). CHANCE OF  
THUNDERSTORMS IN THE EVENING. RAIN SHOWERS  
THROUGH THE NIGHT. CHANCE OF THUNDERSTORMS  
OVERNIGHT.  
TEMPERATURE.........MIN 43.  
RH..................MAX 96 PERCENT.  
WIND (20 FT)........EAST WINDS 13 TO 18 MPH. GUSTS UP TO 30 MPH  
INCREASING TO 35 MPH, THEN DECREASING TO 30 MPH  
TOWARD DAYBREAK. GUSTY AND ERRATIC WINDS  
EXPECTED NEAR THUNDERSTORMS IN THE EVENING.  
GUSTY AND ERRATIC WINDS EXPECTED NEAR  
THUNDERSTORMS OVERNIGHT.  
 

 
FORECASTER...MARINO  
REQUESTED BY...DON KLINGLER  
TYPE OF REQUEST...PRESCRIBED  
.TAG 1707986.0/GRR  
.EMAIL KLINGLERD@MICHIGAN.GOV  
 
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