937  
FNUS53 KDTX 251951  
FWFDTX  
 
FIRE WEATHER PLANNING FORECAST FOR SOUTHEAST MICHIGAN  
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI  
351 PM EDT TUE JUL 25 2017  
   
DISCUSSION
 
HIGH PRESSURE WILL SLOWLY MIGRATE EAST TONIGHT AND WEDNESDAY.  
MINIMUM RH VALUES WILL DROP IN THE AFTERNOONS, INTO THE MID TO UPPER 40  
PERCENTAGE RANGE DURING THIS PERIOD. AN UPPER LEVEL LOW WILL BEGIN  
DROPPING THROUGH THE GREAT LAKES REGION ON WEDNESDAY AND WILL GAIN  
ENHANCEMENT FROM A SURFACE COLD FRONT ON THURSDAY. SHOWERS AND  
THUNDERSTORMS WILL DEVELOP WEDNESDAY AFTERNOON THROUGH THURSDAY.  
 
MIZ047-048-053-060-061-261215-  
MIDLAND-BAY-SAGINAW-SHIAWASSEE-GENESEE-  
INCLUDING THE CITIES OF MIDLAND-BAY CITY-SAGINAW-OWOSSO-FLINT  
351 PM EDT TUE JUL 25 2017  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).  
MIN TEMPERATURE.....56-61.  
24 HR TREND......9 DEGREES WARMER.  
MAX HUMIDITY........95 PERCENT.  
24 HR TREND......2 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.......100-300 FT AGL.  
TRANSPORT WINDS.....SOUTH AROUND 5 MPH.  
SMOKE DISPERSAL.....POOR (0).  
PCPN AMOUNT.........NONE.  
   
WEDNESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT).  
MAX TEMPERATURE.....81-86.  
24 HR TREND......4 DEGREES WARMER.  
MIN HUMIDITY........47-53 PERCENT.  
24 HR TREND......8 PERCENT WETTER.  
20-FOOT WINDS.......SOUTH WINDS 5 TO 10 MPH BECOMING SOUTHWEST  
AROUND 15 MPH EARLY IN THE AFTERNOON.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......3090-3590 FT AGL.  
TRANSPORT WINDS.....SOUTH AROUND 5 MPH BECOMING SOUTHWEST  
AROUND 15 MPH IN THE LATE MORNING AND  
AFTERNOON.  
SMOKE DISPERSAL.....EXCELLENT (610).  
PCPN AMOUNT.........NONE.  
   
WEDNESDAY NIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (65-75 PERCENT) UNTIL 8 PM THEN  
MOSTLY CLOUDY (70-80 PERCENT). A SLIGHT CHANCE  
OF SHOWERS AND THUNDERSTORMS AFTER 8 PM UNTIL  
2 AM THEN CHANCE OF SHOWERS AND  
THUNDERSTORMS. CHANCE OF PRECIPITATION 40  
PERCENT.  
MIN TEMPERATURE.....65-70.  
24 HR TREND......10 DEGREES WARMER.  
MAX HUMIDITY........94-99 PERCENT.  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......SOUTHWEST WINDS 5 TO 10 MPH.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......220-420 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST AROUND 15 MPH DECREASING TO AROUND 5  
MPH IN THE LATE EVENING AND OVERNIGHT.  
SMOKE DISPERSAL.....POOR (0).  
PCPN AMOUNT.........0.06-0.10 IN.  
   
THURSDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). CHANCE OF  
SHOWERS AND THUNDERSTORMS. CHANCE OF  
PRECIPITATION 50 PERCENT.  
MAX TEMPERATURE.....75-80.  
24 HR TREND......5 DEGREES COOLER.  
MIN HUMIDITY........59-68 PERCENT.  
24 HR TREND......19 PERCENT WETTER.  
20-FOOT WINDS.......NORTHWEST WINDS AROUND 5 MPH BECOMING NORTHEAST  
IN THE LATE MORNING AND AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......5580-6080 FT AGL.  
TRANSPORT WINDS.....SOUTH AROUND 5 MPH BECOMING SOUTHEAST IN THE  
LATE MORNING AND EARLY AFTERNOON THEN  
BECOMING NORTHEAST AROUND 15 MPH EARLY IN  
THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (580).  
PCPN AMOUNT.........0.11-0.25 IN.  
 

 
 
MIZ049-054-055-062-261215-  
HURON-TUSCOLA-SANILAC-LAPEER-  
INCLUDING THE CITIES OF BAD AXE-CARO-SANDUSKY-LAPEER  
351 PM EDT TUE JUL 25 2017  
   
TONIGHT
 
 
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT).  
MIN TEMPERATURE.....54-59.  
24 HR TREND......6 DEGREES WARMER.  
MAX HUMIDITY........92-98 PERCENT.  
24 HR TREND......2 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHEAST WINDS 5 TO 10 MPH BECOMING SOUTH  
AFTER MIDNIGHT.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......100-300 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH BECOMING SOUTH AFTER  
MIDNIGHT.  
SMOKE DISPERSAL.....POOR (0).  
PCPN AMOUNT.........NONE.  
   
WEDNESDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT). CHANCE OF  
PRECIPITATION 20 PERCENT.  
MAX TEMPERATURE.....80-85.  
24 HR TREND......9 DEGREES WARMER.  
MIN HUMIDITY........47-57 PERCENT.  
24 HR TREND......2 PERCENT WETTER.  
20-FOOT WINDS.......SOUTH WINDS 5 TO 10 MPH BECOMING SOUTHWEST  
AROUND 15 MPH EARLY IN THE AFTERNOON.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......3130-3630 FT AGL.  
TRANSPORT WINDS.....SOUTH AROUND 5 MPH BECOMING SOUTHWEST 15  
TO 20 MPH IN THE LATE MORNING AND AFTERNOON.  
SMOKE DISPERSAL.....EXCELLENT (610).  
PCPN AMOUNT.........NONE.  
   
WEDNESDAY NIGHT
 
 
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT). A SLIGHT CHANCE  
OF SHOWERS AND THUNDERSTORMS AFTER 8 PM UNTIL  
2 AM THEN CHANCE OF SHOWERS AND  
THUNDERSTORMS. CHANCE OF PRECIPITATION 40  
PERCENT.  
MIN TEMPERATURE.....64-69.  
24 HR TREND......11 DEGREES WARMER.  
MAX HUMIDITY........97 PERCENT.  
24 HR TREND......UNCHANGED.  
20-FOOT WINDS.......SOUTHWEST WINDS 5 TO 10 MPH.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......220-420 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST AROUND 20 MPH DECREASING TO AROUND 5  
MPH IN THE LATE EVENING AND OVERNIGHT.  
SMOKE DISPERSAL.....POOR (0).  
PCPN AMOUNT.........0.01-0.05 IN.  
   
THURSDAY
 
 
SKY/WEATHER.........PARTLY CLOUDY (65-75 PERCENT). CHANCE OF SHOWERS  
AND THUNDERSTORMS. CHANCE OF PRECIPITATION 40  
PERCENT.  
MAX TEMPERATURE.....73-78.  
24 HR TREND......7 DEGREES COOLER.  
MIN HUMIDITY........67-76 PERCENT.  
24 HR TREND......20 PERCENT WETTER.  
20-FOOT WINDS.......NORTHWEST WINDS AROUND 5 MPH BECOMING NORTHEAST  
IN THE LATE MORNING AND AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......5350-5850 FT AGL.  
TRANSPORT WINDS.....WEST AROUND 5 MPH BECOMING EAST IN THE LATE  
MORNING AND EARLY AFTERNOON THEN BECOMING  
NORTHEAST EARLY IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (490).  
PCPN AMOUNT.........0.11-0.25 IN.  
 

 
 
MIZ063-068>070-075-076-082-083-261215-  
ST CLAIR-LIVINGSTON-OAKLAND-MACOMB-WASHTENAW-WAYNE-LENAWEE-MONROE-  
INCLUDING THE CITIES OF PORT HURON-HOWELL-PONTIAC-WARREN-ANN  
ARBOR-DETROIT-ADRIAN-MONROE  
351 PM EDT TUE JUL 25 2017  
   
TONIGHT
 
 
SKY/WEATHER.........CLEAR (10-20 PERCENT).  
MIN TEMPERATURE.....55-60.  
24 HR TREND......7 DEGREES WARMER.  
MAX HUMIDITY........88-98 PERCENT.  
24 HR TREND......3 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHEAST WINDS 5 TO 10 MPH.  
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED  
FIRE GROWTH.  
MIXING HEIGHT.......140-340 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST 5 TO 10 MPH.  
SMOKE DISPERSAL.....POOR (0).  
PCPN AMOUNT.........NONE.  
   
WEDNESDAY
 
 
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT).  
MAX TEMPERATURE.....82-87.  
24 HR TREND......5 DEGREES WARMER.  
MIN HUMIDITY........44-53 PERCENT.  
24 HR TREND......4 PERCENT WETTER.  
20-FOOT WINDS.......LIGHT WINDS BECOMING SOUTHWEST 10 TO 15 MPH IN  
THE LATE MORNING AND AFTERNOON.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......3350-3850 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH BECOMING SOUTH IN THE  
LATE MORNING AND AFTERNOON.  
SMOKE DISPERSAL.....GOOD (500).  
PCPN AMOUNT.........NONE.  
   
WEDNESDAY NIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT) UNTIL MIDNIGHT THEN  
MOSTLY CLOUDY (70-80 PERCENT). CHANCE OF  
SHOWERS AND THUNDERSTORMS AFTER 2 AM. CHANCE OF  
PRECIPITATION 40 PERCENT.  
MIN TEMPERATURE.....65-70.  
24 HR TREND......11 DEGREES WARMER.  
MAX HUMIDITY........88-97 PERCENT.  
24 HR TREND......2 PERCENT DRIER.  
20-FOOT WINDS.......SOUTHWEST WINDS 5 TO 10 MPH.  
HAINES INDEX........5 OR MODERATE POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......300-500 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH DECREASING TO AROUND 5  
MPH AFTER MIDNIGHT.  
SMOKE DISPERSAL.....POOR (0).  
PCPN AMOUNT.........0.01-0.05 IN.  
   
THURSDAY
 
 
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). CHANCE OF  
SHOWERS AND THUNDERSTORMS. CHANCE OF  
PRECIPITATION 60 PERCENT.  
MAX TEMPERATURE.....AROUND 80.  
24 HR TREND......5 DEGREES COOLER.  
MIN HUMIDITY........64-73 PERCENT.  
24 HR TREND......26 PERCENT WETTER.  
20-FOOT WINDS.......SOUTHWEST WINDS AROUND 5 MPH BECOMING EAST IN  
THE LATE MORNING AND AFTERNOON.  
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME  
DOMINATED FIRE GROWTH.  
MIXING HEIGHT.......3770-4270 FT AGL.  
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH BECOMING SOUTHEAST  
EARLY IN THE AFTERNOON.  
SMOKE DISPERSAL.....GOOD (460).  
PCPN AMOUNT.........0.26-0.50 IN.  
 

 
 
   
FORECAST DAYS 3 THROUGH 7
 
 
   
FRIDAY
 
PARTLY CLOUDY. CHANCE OF SHOWERS AND THUNDERSTORMS. LOWS  
IN THE LOWER 60S. HIGHS IN THE MID 70S. NORTHEAST WINDS AROUND  
10 MPH.    
SATURDAY
 
CLEAR. LOWS IN THE MID 50S. HIGHS IN THE UPPER 70S.  
NORTH WINDS AROUND 10 MPH.    
SUNDAY
 
CLEAR. LOWS IN THE UPPER 50S. HIGHS AROUND 80. NORTH WINDS  
AROUND 5 MPH.    
MONDAY
 
MOSTLY CLEAR. A SLIGHT CHANCE OF SHOWERS. LOWS IN THE  
LOWER 60S. HIGHS IN THE LOWER 80S.    
TUESDAY
 
PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS. LOWS IN THE  
LOWER 60S. HIGHS IN THE UPPER 70S.  
 

 
 
SF  
 
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