029  
FNUS53 KDTX 180717  
FWFDTX  
 
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST MICHIGAN  
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI  
317 AM EDT FRI SEP 18 2020  
   
DISCUSSION
 
MINIMUM RH VALUES TO HOLD IN THE 40S THROUGH THE END OF  
THE WEEK INTO EARLY NEXT WEEK AS DRY CONDITIONS HOLD. EXTENDED  
PERIODS OF SUNSHINE ALSO EXPECTED THROUGH THE EARLY PART OF NEXT  
WEEK AS TEMPERATURES REMAIN COOLER THAN NORMAL.  
 
MIZ047-048-053-060-061-181915-  
MIDLAND-BAY-SAGINAW-SHIAWASSEE-GENESEE-  
INCLUDING THE CITIES OF MIDLAND-BAY CITY-SAGINAW-OWOSSO-FLINT  
317 AM EDT FRI SEP 18 2020  
   
TODAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT).  
MAX TEMPERATURE.....54-59.  
24 HR TREND......6 DEGREES COOLER.  
MIN HUMIDITY........35-45 PERCENT.  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......NORTH 5 TO 10 MPH.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......6110-6610 FT AGL.  
TRANSPORT WINDS.....NORTH 5 TO 10 MPH BECOMING NORTHEAST 15 TO  
20 MPH IN THE LATE MORNING AND AFTERNOON.  
SMOKE DISPERSAL.....EXCELLENT (1190).  
PCPN AMOUNT.........NONE.  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT). AREAS OF FROST  
AFTER 3 AM.  
MIN TEMPERATURE.....35-40.  
24 HR TREND......3 DEGREES COOLER.  
MAX HUMIDITY........84-94 PERCENT.  
24 HR TREND......3 PERCENT DRIER.  
20-FOOT WINDS.......NORTHEAST 5 TO 10 MPH UNTIL EARLY MORNING  
BECOMING LIGHT.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......100-300 FT AGL.  
TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH DECREASING TO AROUND 0  
MPH AFTER MIDNIGHT.  
SMOKE DISPERSAL.....POOR (0).  
PCPN AMOUNT.........NONE.  
   
SATURDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT). AREAS OF FROST  
UNTIL 9 AM.  
MAX TEMPERATURE.....55-60.  
24 HR TREND......2 DEGREES WARMER.  
MIN HUMIDITY........36-43 PERCENT.  
24 HR TREND......1 PERCENT DRIER.  
20-FOOT WINDS.......LIGHT WINDS BECOMING NORTHEAST 5 TO 10 MPH IN  
THE LATE MORNING AND AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......5200-5700 FT AGL.  
TRANSPORT WINDS.....NORTH AROUND 0 MPH BECOMING EAST IN THE LATE  
MORNING AND AFTERNOON.  
SMOKE DISPERSAL.....GOOD (330).  
PCPN AMOUNT.........NONE.  
 

 
 
MIZ049-054-055-062-181915-  
HURON-TUSCOLA-SANILAC-LAPEER-  
INCLUDING THE CITIES OF BAD AXE-CARO-SANDUSKY-LAPEER  
317 AM EDT FRI SEP 18 2020  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT).  
MAX TEMPERATURE.....54-59.  
24 HR TREND......6 DEGREES COOLER.  
MIN HUMIDITY........43-53 PERCENT.  
24 HR TREND......1 PERCENT DRIER.  
20-FOOT WINDS.......NORTH 5 TO 10 MPH INCREASING TO AROUND 15 MPH  
EARLY IN THE AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......6030-6530 FT AGL.  
TRANSPORT WINDS.....NORTH 5 TO 10 MPH BECOMING NORTHEAST 15 TO  
20 MPH IN THE LATE MORNING AND AFTERNOON.  
SMOKE DISPERSAL.....EXCELLENT (1250).  
PCPN AMOUNT.........NONE.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT). AREAS OF FROST  
AFTER 3 AM.  
MIN TEMPERATURE.....35-40.  
24 HR TREND......2 DEGREES COOLER.  
MAX HUMIDITY........84-94 PERCENT.  
24 HR TREND......7 PERCENT DRIER.  
20-FOOT WINDS.......NORTHEAST 5 TO 10 MPH UNTIL EARLY MORNING  
BECOMING LIGHT.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
MIXING HEIGHT.......100-300 FT AGL.  
TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH DECREASING TO AROUND 0  
MPH AFTER MIDNIGHT.  
SMOKE DISPERSAL.....POOR (0).  
PCPN AMOUNT.........NONE.  
   
SATURDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT). AREAS OF FROST  
UNTIL 9 AM.  
MAX TEMPERATURE.....56-61.  
24 HR TREND......1 DEGREE WARMER.  
MIN HUMIDITY........43-53 PERCENT.  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......LIGHT WINDS BECOMING EAST 5 TO 10 MPH IN THE  
LATE MORNING AND AFTERNOON.  
HAINES INDEX........2 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......5230-5730 FT AGL.  
TRANSPORT WINDS.....NORTHWEST AROUND 0 MPH BECOMING EAST EARLY IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....FAIR (260).  
PCPN AMOUNT.........NONE.  
 

 
 
MIZ063-068>070-075-076-082-083-181915-  
ST CLAIR-LIVINGSTON-OAKLAND-MACOMB-WASHTENAW-WAYNE-LENAWEE-MONROE-  
INCLUDING THE CITIES OF PORT HURON-HOWELL-PONTIAC-WARREN-ANN  
ARBOR-DETROIT-ADRIAN-MONROE  
317 AM EDT FRI SEP 18 2020  
   
TODAY
 
 
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT).  
MAX TEMPERATURE.....57-62.  
24 HR TREND......6 DEGREES COOLER.  
MIN HUMIDITY........41-51 PERCENT.  
24 HR TREND......3 PERCENT WETTER.  
20-FOOT WINDS.......NORTH 10 TO 15 MPH.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......5850-6350 FT AGL.  
TRANSPORT WINDS.....NORTH AROUND 10 MPH BECOMING NORTHEAST 15 TO 20  
MPH IN THE LATE MORNING AND AFTERNOON.  
SMOKE DISPERSAL.....EXCELLENT (1080).  
PCPN AMOUNT.........NONE.  
   
TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT). AREAS OF FROST  
AFTER 3 AM.  
MIN TEMPERATURE.....34-39.  
24 HR TREND......6 DEGREES COOLER.  
MAX HUMIDITY........84-94 PERCENT.  
24 HR TREND......3 PERCENT DRIER.  
20-FOOT WINDS.......NORTHEAST 5 TO 10 MPH.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......100-300 FT AGL.  
TRANSPORT WINDS.....NORTHEAST 5 TO 10 MPH.  
SMOKE DISPERSAL.....POOR (0).  
PCPN AMOUNT.........NONE.  
   
SATURDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT). AREAS OF FROST  
UNTIL 9 AM.  
MAX TEMPERATURE.....57-62.  
24 HR TREND......UNCHANGED.  
MIN HUMIDITY........37-46 PERCENT.  
24 HR TREND......7 PERCENT DRIER.  
20-FOOT WINDS.......NORTHEAST 5 TO 10 MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
MIXING HEIGHT.......4870-5370 FT AGL.  
TRANSPORT WINDS.....NORTHEAST AROUND 5 MPH BECOMING EAST IN THE  
LATE MORNING AND AFTERNOON.  
SMOKE DISPERSAL.....GOOD (360).  
PCPN AMOUNT.........NONE.  
 

 
 
   
FORECAST DAYS 3 THROUGH 7
 
 
   
SUNDAY
 
CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE MID 60S. EAST  
WINDS AROUND 5 MPH.    
MONDAY
 
CLEAR. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 60S.  
SOUTHEAST WINDS AROUND 5 MPH.    
TUESDAY
 
MOSTLY CLEAR. LOWS IN THE MID 40S. HIGHS IN THE LOWER  
70S. SOUTH WINDS AROUND 5 MPH.    
WEDNESDAY
 
MOSTLY CLEAR. LOWS IN THE LOWER 50S. HIGHS IN THE MID  
70S.    
THURSDAY
 
PARTLY CLOUDY. CHANCE OF SHOWERS. LOWS IN THE MID 50S.  
HIGHS IN THE MID 70S.  
 

 
 
AM  
 
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