507
FNUS53 KGRR 170744
FWFGRR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST LOWER MICHIGAN
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
344 AM EDT WED SEP 17 2025
..MOSTLY DRY UNTIL THIS WEEKEND
DISCUSSION
LIGHT AND VARIABLE WINDS ARE EXPECTED TODAY WITH MIXING HEIGHTS
AROUND 4000 TO 6000 FEET THIS AFTERNOON. MINIMUM RELATIVE HUMIDITY
VALUES ARE EXPECTED TO BE IN THE 30S. IF MORE AFTERNOON MIXING OCCURS
THERE IS A 20 PERCENT CHANCE RELATIVE HUMIDITY VALUES COULD DROP INTO
THE 20S.
A BACKDOOR COLD FRONT MOVES THROUGH THURSDAY WITH NORTHWEST WINDS
BECOMING NORTHEASTERLY BY THURSDAY NIGHT. THE FRONT COULD BRING WITH
IT SOME ISOLATED SHOWERS, OTHERWISE DRY CONDITIONS ARE EXPECTED
THROUGH SATURDAY.
OUR NEXT CHANCE FOR SHOWERS AND A FEW THUNDERSTORMS MOVES IN SATURDAY
NIGHT AND CONTINUES INTO TUESDAY. A WIDESPREAD CONTINUOUS RAIN IS
NOT EXPECTED, SHOWERS WILL BE ISOLATED TO SCATTERED FOR PERIODS
DURING THIS TIMEFRAME.
MIZ037>039-043>045-172015-
MASON-LAKE-OSCEOLA-OCEANA-NEWAYGO-MECOSTA-
INCLUDING THE CITIES OF LUDINGTON, BALDWIN, REED CITY, HART,
FREMONT, AND BIG RAPIDS
344 AM EDT WED SEP 17 2025
TODAY
SKY/WEATHER.........SUNNY (10-20 PERCENT). PATCHY FOG UNTIL 8 AM.
MAX TEMPERATURE.....81-86.
24 HR TREND......2 DEGREES WARMER.
MIN HUMIDITY........46-51 PERCENT NEAR LAKE MICHIGAN AND 36-41
PERCENT INLAND.
24 HR TREND......UNCHANGED NEAR LAKE MICHIGAN AND 1 PERCENT
DRIER INLAND.
20-FOOT WINDS.......LIGHT WINDS BECOMING WEST AROUND 5 MPH IN THE
AFTERNOON.
MIXING HEIGHT.......NEAR LAKE MICHIGAN, 1900-2400 FT AGL.
MIXING HEIGHT.......INLAND, 1400-1900 FT AGL INCREASING TO
4800-5300 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH AROUND 5 MPH SHIFTING TO THE NORTHWEST IN
THE AFTERNOON.
SMOKE DISPERSAL.....120-330 (POOR TO GOOD).
PCPN AMOUNT.........NONE.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT).
MIN TEMPERATURE.....53-58.
24 HR TREND......4 DEGREES WARMER.
MAX HUMIDITY........95-100 PERCENT.
24 HR TREND......UNCHANGED.
20-FOOT WINDS.......LIGHT WINDS.
MIXING HEIGHT.......NEAR LAKE MICHIGAN, 700-1200 FT AGL.
MIXING HEIGHT.......INLAND, 4200-4700 FT AGL DECREASING TO 100-600
FT AGL AFTER MIDNIGHT.
TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH.
SMOKE DISPERSAL.....30-280 (POOR TO FAIR).
PCPN AMOUNT.........NONE.
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT).
MAX TEMPERATURE.....80-85.
24 HR TREND......2 DEGREES COOLER.
MIN HUMIDITY........58-63 PERCENT NEAR LAKE MICHIGAN AND 46-51
PERCENT INLAND.
24 HR TREND......14 PERCENT WETTER NEAR LAKE MICHIGAN AND 11
PERCENT WETTER INLAND.
20-FOOT WINDS.......LIGHT WINDS BECOMING NORTHWEST AROUND 7 MPH IN
THE AFTERNOON.
MIXING HEIGHT.......NEAR LAKE MICHIGAN, 1800-2300 FT AGL.
MIXING HEIGHT.......INLAND, 1300-1800 FT AGL INCREASING TO
4600-5100 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
SMOKE DISPERSAL.....140-540 (FAIR TO GOOD).
PCPN AMOUNT.........NONE TO 0.03 IN.
MIZ040-046-172015-
CLARE-ISABELLA-
INCLUDING THE CITIES OF CLARE AND MOUNT PLEASANT
344 AM EDT WED SEP 17 2025
TODAY
SKY/WEATHER.........SUNNY (10-20 PERCENT). AREAS OF FOG UNTIL 9 AM.
MAX TEMPERATURE.....AROUND 84.
24 HR TREND......4 DEGREES WARMER.
MIN HUMIDITY........33-38 PERCENT.
24 HR TREND......1 PERCENT DRIER.
20-FOOT WINDS.......LIGHT WINDS.
MIXING HEIGHT.......1300-1800 FT AGL INCREASING TO 5600-6100 FT AGL
IN THE AFTERNOON.
TRANSPORT WINDS.....WEST AROUND 5 MPH SHIFTING TO THE NORTH IN THE
AFTERNOON.
SMOKE DISPERSAL.....90-280 (POOR TO FAIR).
PCPN AMOUNT.........NONE.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT). PATCHY FOG AFTER
3 AM UNTIL 4 AM.
MIN TEMPERATURE.....53-58.
24 HR TREND......7 DEGREES WARMER.
MAX HUMIDITY........95-100 PERCENT.
24 HR TREND......UNCHANGED.
20-FOOT WINDS.......LIGHT WINDS.
MIXING HEIGHT.......5200-5700 FT AGL DECREASING TO 0-500 FT AGL
AFTER MIDNIGHT.
TRANSPORT WINDS.....WEST AROUND 5 MPH.
SMOKE DISPERSAL.....40-250 (POOR TO FAIR).
PCPN AMOUNT.........NONE.
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). PATCHY FOG AFTER
7 AM UNTIL 9 AM.
MAX TEMPERATURE.....80-85.
24 HR TREND......1 DEGREE COOLER.
MIN HUMIDITY........44-49 PERCENT.
24 HR TREND......14 PERCENT WETTER.
20-FOOT WINDS.......LIGHT WINDS BECOMING NORTHWEST AROUND 6 MPH IN
THE AFTERNOON.
MIXING HEIGHT.......1400-1900 FT AGL INCREASING TO 4900-5400 FT AGL
IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
SMOKE DISPERSAL.....120-520 (POOR TO GOOD).
PCPN AMOUNT.........NONE TO 0.26 IN.
MIZ050-056-064-071-172015-
MUSKEGON-OTTAWA-ALLEGAN-VAN BUREN-
INCLUDING THE CITIES OF MUSKEGON, GRAND HAVEN, JENISON, HOLLAND,
AND SOUTH HAVEN
344 AM EDT WED SEP 17 2025
TODAY
SKY/WEATHER.........SUNNY (5-15 PERCENT).
MAX TEMPERATURE.....81-86.
24 HR TREND......2 DEGREES WARMER.
MIN HUMIDITY........35-40 PERCENT.
24 HR TREND......4 PERCENT DRIER.
20-FOOT WINDS.......LIGHT WINDS.
MIXING HEIGHT.......NEAR LAKE MICHIGAN, 1300-1800 FT AGL INCREASING
TO 3300-3800 FT AGL IN THE AFTERNOON.
MIXING HEIGHT.......INLAND, 1700-2200 FT AGL INCREASING TO
5100-5600 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH SHIFTING TO THE NORTH IN
THE AFTERNOON.
SMOKE DISPERSAL.....70-300 (POOR TO GOOD).
PCPN AMOUNT.........NONE.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT). PATCHY FOG AFTER
5 AM.
MIN TEMPERATURE.....54-59.
24 HR TREND......3 DEGREES WARMER.
MAX HUMIDITY........95-100 PERCENT.
24 HR TREND......UNCHANGED.
20-FOOT WINDS.......LIGHT WINDS.
MIXING HEIGHT.......NEAR LAKE MICHIGAN, 600-1100 FT AGL.
MIXING HEIGHT.......INLAND, 4300-4800 FT AGL DECREASING TO 0-500 FT
AGL AFTER MIDNIGHT.
TRANSPORT WINDS.....NORTH AROUND 5 MPH.
SMOKE DISPERSAL.....20-250 (POOR TO FAIR).
PCPN AMOUNT.........NONE.
THURSDAY
SKY/WEATHER.........SUNNY (15-25 PERCENT). PATCHY FOG UNTIL 7 AM.
MAX TEMPERATURE.....81-86.
24 HR TREND......1 DEGREE WARMER.
MIN HUMIDITY........52-57 PERCENT NEAR LAKE MICHIGAN AND 40-45
PERCENT INLAND.
24 HR TREND......14 PERCENT WETTER NEAR LAKE MICHIGAN AND 6
PERCENT WETTER INLAND.
20-FOOT WINDS.......LIGHT WINDS BECOMING WEST AROUND 7 MPH IN THE
AFTERNOON.
MIXING HEIGHT.......NEAR LAKE MICHIGAN, 1200-1700 FT AGL.
MIXING HEIGHT.......INLAND, 1500-2000 FT AGL INCREASING TO
5300-5800 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 5 TO 10 MPH.
SMOKE DISPERSAL.....100-480 (POOR TO GOOD).
PCPN AMOUNT.........NONE.
MIZ051-052-057>059-172015-
MONTCALM-GRATIOT-KENT-IONIA-CLINTON-
INCLUDING THE CITIES OF GREENVILLE, ALMA, GRAND RAPIDS, IONIA,
AND ST. JOHNS
344 AM EDT WED SEP 17 2025
TODAY
SKY/WEATHER.........SUNNY (10-20 PERCENT). PATCHY FOG UNTIL 9 AM.
MAX TEMPERATURE.....AROUND 84.
24 HR TREND......4 DEGREES WARMER.
MIN HUMIDITY........34-39 PERCENT.
24 HR TREND......7 PERCENT DRIER.
20-FOOT WINDS.......LIGHT WINDS.
MIXING HEIGHT.......1300-1800 FT AGL INCREASING TO 5500-6000 FT AGL
IN THE AFTERNOON.
TRANSPORT WINDS.....EAST AROUND 5 MPH SHIFTING TO THE NORTH IN THE
AFTERNOON.
SMOKE DISPERSAL.....60-290 (POOR TO FAIR).
PCPN AMOUNT.........NONE.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT).
MIN TEMPERATURE.....AROUND 57.
24 HR TREND......5 DEGREES WARMER.
MAX HUMIDITY........95-100 PERCENT.
24 HR TREND......UNCHANGED.
20-FOOT WINDS.......WEST WINDS 5 TO 6 MPH.
MIXING HEIGHT.......5000-5500 FT AGL DECREASING TO 100-600 FT AGL
AFTER MIDNIGHT.
TRANSPORT WINDS.....NORTHWEST AROUND 5 MPH.
SMOKE DISPERSAL.....30-250 (POOR TO FAIR).
PCPN AMOUNT.........NONE.
THURSDAY
SKY/WEATHER.........SUNNY (20-30 PERCENT).
MAX TEMPERATURE.....AROUND 85.
24 HR TREND......1 DEGREE WARMER.
MIN HUMIDITY........43-48 PERCENT.
24 HR TREND......11 PERCENT WETTER.
20-FOOT WINDS.......LIGHT WINDS BECOMING NORTHWEST AROUND 7 MPH IN
THE AFTERNOON.
MIXING HEIGHT.......1400-1900 FT AGL INCREASING TO 5700-6200 FT AGL
IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
SMOKE DISPERSAL.....130-650 (FAIR TO EXCELLENT).
PCPN AMOUNT.........NONE TO 0.24 IN.
MIZ065>067-072>074-172015-
BARRY-EATON-INGHAM-KALAMAZOO-CALHOUN-JACKSON-
INCLUDING THE CITIES OF HASTINGS, CHARLOTTE, LANSING, KALAMAZOO,
BATTLE CREEK, AND JACKSON
344 AM EDT WED SEP 17 2025
TODAY
SKY/WEATHER.........SUNNY (10-20 PERCENT). PATCHY FOG UNTIL 9 AM.
MAX TEMPERATURE.....AROUND 84.
24 HR TREND......2 DEGREES WARMER.
MIN HUMIDITY........33-38 PERCENT.
24 HR TREND......1 PERCENT DRIER.
20-FOOT WINDS.......LIGHT WINDS.
MIXING HEIGHT.......2100-2600 FT AGL INCREASING TO 5600-6100 FT AGL
IN THE AFTERNOON.
TRANSPORT WINDS.....EAST AROUND 5 MPH SHIFTING TO THE NORTH IN THE
AFTERNOON.
SMOKE DISPERSAL.....80-260 (POOR TO FAIR).
PCPN AMOUNT.........NONE.
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (5-15 PERCENT). PATCHY FOG AFTER 5
AM.
MIN TEMPERATURE.....AROUND 55.
24 HR TREND......4 DEGREES WARMER.
MAX HUMIDITY........95-100 PERCENT.
24 HR TREND......UNCHANGED.
20-FOOT WINDS.......LIGHT WINDS.
MIXING HEIGHT.......5300-5800 FT AGL DECREASING TO 100-600 FT AGL
AFTER MIDNIGHT.
TRANSPORT WINDS.....NORTH AROUND 5 MPH SHIFTING TO THE NORTHWEST
AFTER MIDNIGHT.
SMOKE DISPERSAL.....30-250 (POOR TO FAIR).
PCPN AMOUNT.........NONE.
THURSDAY
SKY/WEATHER.........SUNNY (15-25 PERCENT). PATCHY FOG UNTIL 7 AM.
MAX TEMPERATURE.....84-89.
24 HR TREND......2 DEGREES WARMER.
MIN HUMIDITY........37-42 PERCENT.
24 HR TREND......6 PERCENT WETTER.
20-FOOT WINDS.......LIGHT WINDS BECOMING NORTHWEST AROUND 6 MPH IN
THE AFTERNOON.
MIXING HEIGHT.......2300-2800 FT AGL INCREASING TO 7000-7500 FT AGL
IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 5 TO 10 MPH.
SMOKE DISPERSAL.....160-640 (FAIR TO EXCELLENT).
PCPN AMOUNT.........NONE TO 0.01 IN.
FORECAST FOR DAYS 3 THROUGH 7
THURSDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. NORTH WINDS
5 TO 8 MPH SHIFTING TO THE NORTHEAST 5 TO 6 MPH AFTER MIDNIGHT.
FRIDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. EAST WINDS 5 TO
9 MPH.
FRIDAY NIGHT
PARTLY CLOUDY. LOWS IN THE UPPER 40S. EAST WINDS
5 TO 9 MPH.
SATURDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 70S. SOUTHEAST WINDS
5 TO 10 MPH.
SATURDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 50S. SOUTHEAST
WINDS 5 TO 9 MPH.
SUNDAY
PARTLY SUNNY. CHANCE OF SHOWERS IN THE AFTERNOON. HIGHS IN
THE LOWER 80S. SOUTH WINDS 5 TO 10 MPH.
SUNDAY NIGHT
PARTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS AROUND
60.
MONDAY
PARTLY SUNNY WITH A CHANCE OF SHOWERS. HIGHS IN THE UPPER
70S.
MONDAY NIGHT
PARTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN THE
UPPER 50S.
TUESDAY
PARTLY SUNNY. HIGHS IN THE UPPER 70S.
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