354  
FNUS53 KGRR 241923  
FWFGRR  
 
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST LOWER MICHIGAN  
NATIONAL WEATHER SERVICE GRAND RAPIDS MI  
323 PM EDT THU SEP 24 2020  
   
..WARM AND MOSTLY DRY INTO SATURDAY THEN COOLER AND WET
 
 
   
DISCUSSION
 
WE HAVE TWO MORE DAYS OF WARM AND MOSTLY DRY  
WEATHER BEFORE THE COLD AIR COMES IN AND WE BEGIN A PROLONGED  
WET PERIOD. IT WILL BE RATHER BREEZY SATURDAY INTO SUNDAY.  
A FEW SHOWERS AND ISOLATED THUNDERSTORMS ARE POSSIBLE FRIDAY  
NIGHT AND SATURDAY NIGHT, MOSTLY NORTH AND WEST OF GRAND RAPIDS.  
ONCE THE COLD FRONT COMES THROUGH SUNDAY MORNING, PERIODS OF  
SHOWERS WILL BEGIN, THEN CONTINUE INTO THURSDAY. IT WILL TURN  
MUCH COLDER TOO, HIGHS WILL STRUGGLE TO MAKE 50 BY WEDNESDAY.  
 
MIZ037>039-043>045-250815-  
MASON-LAKE-OSCEOLA-OCEANA-NEWAYGO-MECOSTA-  
INCLUDING THE CITIES OF LUDINGTON, BALDWIN, REED CITY, HART,  
FREMONT, AND BIG RAPIDS  
323 PM EDT THU SEP 24 2020  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT).  
MIN TEMPERATURE.....51-56.  
24 HR TREND......3 DEGREES WARMER.  
MAX HUMIDITY........95-100 PERCENT.  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......SOUTH WINDS 5 TO 7 MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
MIXING HEIGHT.......0-300 FT AGL.  
TRANSPORT WINDS.....SOUTH AROUND 5 MPH.  
SMOKE DISPERSAL.....0 (POOR).  
PCPN AMOUNT.........NONE.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY (10-20 PERCENT).  
MAX TEMPERATURE.....74-79.  
24 HR TREND......2 DEGREES WARMER.  
MIN HUMIDITY........42-47 PERCENT.  
24 HR TREND......10 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST WINDS 7 TO 12 MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
MIXING HEIGHT.......3500-4000 FT AGL NEAR LAKE MICHIGAN AND  
4600-5100 FT AGL INLAND.  
TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH.  
SMOKE DISPERSAL.....800-1000 (EXCELLENT).  
PCPN AMOUNT.........NONE.  
   
FRIDAY NIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT) UNTIL 0500, THEN  
MOSTLY CLOUDY (65-75 PERCENT). CHANCE OF RAIN  
SHOWERS AFTER 0200.  
CHANCE OF PCPN......40 PERCENT OVERNIGHT.  
MIN TEMPERATURE.....57-62.  
24 HR TREND......6 DEGREES WARMER.  
MAX HUMIDITY........92-97 PERCENT.  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......SOUTH WINDS 6 TO 11 MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
MIXING HEIGHT.......0-400 FT AGL.  
TRANSPORT WINDS.....SOUTH AROUND 5 MPH.  
SMOKE DISPERSAL.....0 (POOR).  
PCPN AMOUNT.........NONE TO 0.02 IN.  
   
SATURDAY
 
 
SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT).  
MAX TEMPERATURE.....74-79.  
24 HR TREND......UNCHANGED.  
MIN HUMIDITY........66-71 PERCENT NEAR LAKE MICHIGAN AND 56-61  
PERCENT INLAND.  
24 HR TREND......16 PERCENT WETTER NEAR LAKE MICHIGAN AND 19  
PERCENT WETTER INLAND.  
20-FOOT WINDS.......SOUTHWEST WINDS 10 TO 15 MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
MIXING HEIGHT.......1100-1600 FT AGL NEAR LAKE MICHIGAN AND  
2900-3400 FT AGL INLAND.  
TRANSPORT WINDS.....SOUTHWEST AROUND 15 MPH INCREASING TO SOUTH  
AROUND 25 MPH IN THE AFTERNOON.  
SMOKE DISPERSAL.....800-900 (EXCELLENT).  
PCPN AMOUNT.........NONE TO 0.01 IN.  
 

 
 
MIZ040-046-250815-  
CLARE-ISABELLA-  
INCLUDING THE CITIES OF CLARE AND MOUNT PLEASANT  
323 PM EDT THU SEP 24 2020  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT).  
MIN TEMPERATURE.....AROUND 53.  
24 HR TREND......UNCHANGED.  
MAX HUMIDITY........95-100 PERCENT. !! MUST START HERE OR ON THE LINE DIRECTLY BELOW !!  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......WEST WINDS AROUND 5 MPH IN THE EVENING BECOMING  
LIGHT.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
MIXING HEIGHT.......0-300 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.  
SMOKE DISPERSAL.....0 (POOR).  
PCPN AMOUNT.........NONE.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY (10-20 PERCENT).  
MAX TEMPERATURE.....AROUND 79.  
24 HR TREND......2 DEGREES WARMER.  
MIN HUMIDITY........43 PERCENT.  
24 HR TREND......11 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST WINDS 6 TO 11 MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED !! MUST START HERE OR ON THE LINE DIRECTLY BELOW !!  
FIRE GROWTH.  
MIXING HEIGHT.......5300-5800 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH.  
SMOKE DISPERSAL.....700-1000 (EXCELLENT).  
PCPN AMOUNT.........NONE.  
   
FRIDAY NIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT) UNTIL 0500, THEN  
MOSTLY CLOUDY (70-80 PERCENT).  
MIN TEMPERATURE.....AROUND 58.  
24 HR TREND......5 DEGREES WARMER.  
MAX HUMIDITY........92-97 PERCENT.  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......SOUTH WINDS 5 TO 10 MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
MIXING HEIGHT.......0-200 FT AGL.  
TRANSPORT WINDS.....SOUTH AROUND 5 MPH.  
SMOKE DISPERSAL.....0 (POOR).  
PCPN AMOUNT.........NONE TO 0.01 IN.  
   
SATURDAY
 
 
SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT).  
MAX TEMPERATURE.....76-81.  
24 HR TREND......1 DEGREE COOLER.  
MIN HUMIDITY........51-56 PERCENT.  
24 HR TREND......12 PERCENT WETTER.  
20-FOOT WINDS.......SOUTHWEST WINDS 9 TO 14 MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
MIXING HEIGHT.......3300-3800 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 20 TO 25 MPH.  
SMOKE DISPERSAL.....800-1000 (EXCELLENT).  
PCPN AMOUNT.........NONE TO 0.01 IN.  
 

 
 
MIZ050-056-064-071-250815-  
MUSKEGON-OTTAWA-ALLEGAN-VAN BUREN-  
INCLUDING THE CITIES OF MUSKEGON, GRAND HAVEN, JENISON, HOLLAND,  
AND SOUTH HAVEN  
323 PM EDT THU SEP 24 2020  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).  
MIN TEMPERATURE.....52-57.  
24 HR TREND......2 DEGREES WARMER.  
MAX HUMIDITY........95-100 PERCENT.  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......LIGHT WINDS BECOMING SOUTH AROUND 5 MPH  
OVERNIGHT.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......0-200 FT AGL.  
TRANSPORT WINDS.....SOUTH AROUND 5 MPH.  
SMOKE DISPERSAL.....0 (POOR).  
PCPN AMOUNT.........NONE.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY (0-10 PERCENT).  
MAX TEMPERATURE.....75-80.  
24 HR TREND......5 DEGREES WARMER.  
MIN HUMIDITY........41-46 PERCENT.  
24 HR TREND......9 PERCENT DRIER.  
20-FOOT WINDS.......SOUTH WINDS 5 TO 10 MPH.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......3900-4400 FT AGL NEAR LAKE MICHIGAN AND  
5300-5800 FT AGL INLAND.  
TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.  
SMOKE DISPERSAL.....600-800 (EXCELLENT).  
PCPN AMOUNT.........NONE.  
   
FRIDAY NIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT).  
MIN TEMPERATURE.....58-63.  
24 HR TREND......6 DEGREES WARMER.  
MAX HUMIDITY........91-96 PERCENT.  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......SOUTH WINDS 5 TO 10 MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
MIXING HEIGHT.......0-100 FT AGL.  
TRANSPORT WINDS.....SOUTH AROUND 5 MPH.  
SMOKE DISPERSAL.....0 (POOR).  
PCPN AMOUNT.........NONE.  
   
SATURDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT).  
MAX TEMPERATURE.....78-83.  
24 HR TREND......UNCHANGED.  
MIN HUMIDITY........51-56 PERCENT.  
24 HR TREND......12 PERCENT WETTER.  
20-FOOT WINDS.......SOUTH WINDS 11 TO 16 MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
MIXING HEIGHT.......3000-3500 FT AGL.  
TRANSPORT WINDS.....SOUTH AROUND 15 MPH INCREASING TO AROUND 25 MPH  
IN THE AFTERNOON.  
SMOKE DISPERSAL.....700-900 (EXCELLENT).  
PCPN AMOUNT.........NONE.  
 

 
 
MIZ051-052-057>059-250815-  
MONTCALM-GRATIOT-KENT-IONIA-CLINTON-  
INCLUDING THE CITIES OF GREENVILLE, ALMA, GRAND RAPIDS, IONIA,  
AND ST. JOHNS  
323 PM EDT THU SEP 24 2020  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT).  
MIN TEMPERATURE.....50-55.  
24 HR TREND......2 DEGREES COOLER.  
MAX HUMIDITY........95-100 PERCENT.  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......SOUTHWEST WINDS 5 TO 7 MPH.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......0-200 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.  
SMOKE DISPERSAL.....0 (POOR).  
PCPN AMOUNT.........NONE.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY (5-15 PERCENT).  
MAX TEMPERATURE.....AROUND 79.  
24 HR TREND......2 DEGREES WARMER.  
MIN HUMIDITY........41-46 PERCENT.  
24 HR TREND......4 PERCENT DRIER.  
20-FOOT WINDS.......SOUTH WINDS 6 TO 11 MPH.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......5300-5800 FT AGL.  
TRANSPORT WINDS.....SOUTH 10 TO 15 MPH.  
SMOKE DISPERSAL.....600-900 (EXCELLENT).  
PCPN AMOUNT.........NONE.  
   
FRIDAY NIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT).  
MIN TEMPERATURE.....56-61.  
24 HR TREND......5 DEGREES WARMER.  
MAX HUMIDITY........91-96 PERCENT.  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......SOUTH WINDS 5 TO 10 MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
MIXING HEIGHT.......0-100 FT AGL.  
TRANSPORT WINDS.....SOUTH AROUND 5 MPH.  
SMOKE DISPERSAL.....0 (POOR).  
PCPN AMOUNT.........NONE.  
   
SATURDAY
 
 
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT).  
MAX TEMPERATURE.....AROUND 80.  
24 HR TREND......1 DEGREE WARMER.  
MIN HUMIDITY........49-54 PERCENT.  
24 HR TREND......10 PERCENT WETTER.  
20-FOOT WINDS.......SOUTHWEST WINDS 11 TO 16 MPH.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......3200-3700 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 20 TO 25 MPH.  
SMOKE DISPERSAL.....800-1000 (EXCELLENT).  
PCPN AMOUNT.........NONE.  
 

 
 
MIZ065>067-072>074-250815-  
BARRY-EATON-INGHAM-KALAMAZOO-CALHOUN-JACKSON-  
INCLUDING THE CITIES OF HASTINGS, CHARLOTTE, LANSING, KALAMAZOO,  
BATTLE CREEK, AND JACKSON  
323 PM EDT THU SEP 24 2020  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT).  
MIN TEMPERATURE.....51-56.  
24 HR TREND......UNCHANGED.  
MAX HUMIDITY........95-100 PERCENT.  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......SOUTHWEST WINDS 5 TO 6 MPH.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......0-100 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.  
SMOKE DISPERSAL.....0 (POOR).  
PCPN AMOUNT.........NONE.  
   
FRIDAY
 
 
SKY/WEATHER.........SUNNY (0-10 PERCENT).  
MAX TEMPERATURE.....AROUND 79.  
24 HR TREND......2 DEGREES WARMER.  
MIN HUMIDITY........39-44 PERCENT.  
24 HR TREND......1 PERCENT DRIER.  
20-FOOT WINDS.......SOUTH WINDS 5 TO 10 MPH.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......5500-6000 FT AGL.  
TRANSPORT WINDS.....SOUTH 5 TO 10 MPH.  
SMOKE DISPERSAL.....500-800 (GOOD TO EXCELLENT).  
PCPN AMOUNT.........NONE.  
   
FRIDAY NIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT).  
MIN TEMPERATURE.....55-60.  
24 HR TREND......5 DEGREES WARMER.  
MAX HUMIDITY........95-100 PERCENT.  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......SOUTH WINDS 5 TO 10 MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
MIXING HEIGHT.......0-100 FT AGL.  
TRANSPORT WINDS.....SOUTH AROUND 5 MPH.  
SMOKE DISPERSAL.....0 (POOR).  
PCPN AMOUNT.........NONE.  
   
SATURDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT).  
MAX TEMPERATURE.....AROUND 81.  
24 HR TREND......2 DEGREES WARMER.  
MIN HUMIDITY........50-55 PERCENT.  
24 HR TREND......12 PERCENT WETTER.  
20-FOOT WINDS.......SOUTHWEST WINDS 10 TO 15 MPH.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......3100-3600 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST AROUND 15 MPH INCREASING TO SOUTH  
AROUND 25 MPH IN THE AFTERNOON.  
SMOKE DISPERSAL.....800-900 (EXCELLENT).  
PCPN AMOUNT.........NONE.  
 

 
   
FORECAST FOR DAYS 3 THROUGH 7
 
 
   
SATURDAY NIGHT
 
PARTLY CLOUDY WITH A CHANCE OF SHOWERS AND A  
SLIGHT CHANCE OF THUNDERSTORMS. LOWS IN THE MID 60S. SOUTHWEST WINDS  
11 TO 16 MPH.    
SUNDAY
 
MOSTLY CLOUDY. CHANCE OF SHOWERS IN THE AFTERNOON. HIGHS  
IN THE MID 70S. WEST WINDS 8 TO 13 MPH.    
SUNDAY NIGHT
 
COOLER. MOSTLY CLOUDY. CHANCE OF SHOWERS. LOWS IN  
THE LOWER 50S. WEST WINDS 5 TO 6 MPH.    
MONDAY
 
COOLER. MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. HIGHS IN  
THE MID 60S. WEST WINDS 5 TO 9 MPH.    
MONDAY NIGHT
 
PARTLY CLOUDY. CHANCE OF SHOWERS. LOWS IN THE UPPER  
40S. WEST WINDS 5 TO 6 MPH.    
TUESDAY
 
MOSTLY CLOUDY. SHOWERS LIKELY. HIGHS IN THE UPPER 50S.  
WEST WINDS 5 TO 10 MPH.    
TUESDAY NIGHT
 
MOSTLY CLOUDY. CHANCE OF SHOWERS. LOWS IN THE MID  
40S.    
WEDNESDAY
 
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. HIGHS IN THE  
MID 50S.    
WEDNESDAY NIGHT
 
PARTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN  
THE LOWER 40S.    
THURSDAY
 
PARTLY SUNNY WITH A CHANCE OF SHOWERS. HIGHS IN THE  
LOWER 50S.  
 

 
 
WDM  
 
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