903
FNUS53 KGRR 280839
FWFGRR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST LOWER MICHIGAN
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
439 AM EDT FRI AUG 28 2026
..INCREASING HUMIDITY INTO NEXT WEEK
DISCUSSION
TODAY MINIMUM RELATIVE HUMIDITY VALUES WILL BE THE LOWEST COMPARED TO
THE NEXT WEEK WITH VALUES IN THE 30S TO LOW 40S ACROSS MUCH OF THE
AREA. VALUES WILL THEN BE IN THE 50S TO 60S SUNDAY INTO NEXT WEEK.
RAIN AND THUNDERSTORM CHANCES ARE EXPECTED AS EARLY AS SATURDAY
NIGHT, BUT THE BEST CHANCES WILL BE SUNDAY NIGHT AND EACH NIGHT
THEREAFTER. LOWER CONFIDENCE IN THUNDERSTORMS AND SHOWERS DURING THE
DAY. THERE IS THE POTENTIAL FOR SOME SPOTS TO SEE HEAVY RAINFALL
DEPENDING ON WHERE THUNDERSTORMS SET UP.
WINDS WILL BE LIGHT AND VARIABLE UNTIL THE LAKE BREEZE CAUSES WINDS
TO BE MORE WESTERLY THIS AFTERNOON. SOUTHERLY WINDS ARE THEN
EXPECTED FOR SATURDAY AND INTO NEXT WEEK.
MIZ037>039-043>045-282015-
MASON-LAKE-OSCEOLA-OCEANA-NEWAYGO-MECOSTA-
INCLUDING THE CITIES OF LUDINGTON, BALDWIN, REED CITY, HART,
FREMONT, AND BIG RAPIDS
439 AM EDT FRI AUG 28 2026
TODAY
SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT).
MAX TEMPERATURE.....75-80.
24 HR TREND......2 DEGREES WARMER.
MIN HUMIDITY........49-54 PERCENT NEAR LAKE MICHIGAN AND 39-44
PERCENT INLAND.
24 HR TREND......15 PERCENT DRIER NEAR LAKE MICHIGAN AND 2
PERCENT DRIER INLAND.
20-FOOT WINDS.......LIGHT WINDS BECOMING SOUTHWEST AROUND 6 MPH IN
THE AFTERNOON.
MIXING HEIGHT.......NEAR LAKE MICHIGAN, 1600-2100 FT AGL INCREASING
TO 3600-4100 FT AGL IN THE AFTERNOON.
MIXING HEIGHT.......INLAND, 1800-2300 FT AGL INCREASING TO
6200-6700 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH SHIFTING TO THE
SOUTHWEST IN THE AFTERNOON.
SMOKE DISPERSAL.....200-760 (FAIR TO EXCELLENT).
PCPN AMOUNT.........NONE.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT).
MIN TEMPERATURE.....51-56.
24 HR TREND......5 DEGREES WARMER.
MAX HUMIDITY........95-100 PERCENT.
24 HR TREND......UNCHANGED.
20-FOOT WINDS.......LIGHT WINDS.
MIXING HEIGHT.......NEAR LAKE MICHIGAN, 2100-2600 FT AGL DECREASING
TO 0-500 FT AGL AFTER MIDNIGHT.
MIXING HEIGHT.......INLAND, 5100-5600 FT AGL DECREASING TO 0-400 FT
AGL AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH.
SMOKE DISPERSAL.....640 (EXCELLENT) DECREASING TO 50 (POOR) AFTER
MIDNIGHT.
PCPN AMOUNT.........NONE.
SATURDAY
SKY/WEATHER.........MOSTLY SUNNY (45-55 PERCENT) UNTIL 3 PM, THEN
CLOUDY (90-100 PERCENT). CHANCE OF RAIN SHOWERS
AFTER 5 PM.
CHANCE OF PCPN......30 PERCENT LATE IN THE AFTERNOON.
MAX TEMPERATURE.....77-82.
24 HR TREND......1 DEGREE WARMER.
MIN HUMIDITY........60-65 PERCENT NEAR LAKE MICHIGAN AND 49-54
PERCENT INLAND.
24 HR TREND......18 PERCENT WETTER NEAR LAKE MICHIGAN AND 13
PERCENT WETTER INLAND.
20-FOOT WINDS.......SOUTHWEST WINDS 7 TO 12 MPH. GUSTS UP TO 21 MPH
IN THE AFTERNOON.
MIXING HEIGHT.......3100-3600 FT AGL NEAR LAKE MICHIGAN AND
5000-5500 FT AGL INLAND.
TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH.
SMOKE DISPERSAL.....690-1010 (EXCELLENT).
PCPN AMOUNT.........NONE TO 0.03 IN.
MIZ040-046-282015-
CLARE-ISABELLA-
INCLUDING THE CITIES OF CLARE AND MOUNT PLEASANT
439 AM EDT FRI AUG 28 2026
TODAY
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT).
MAX TEMPERATURE.....75-80.
24 HR TREND......2 DEGREES COOLER.
MIN HUMIDITY........36-41 PERCENT.
24 HR TREND......UNCHANGED.
20-FOOT WINDS.......LIGHT WINDS.
MIXING HEIGHT.......2000-2500 FT AGL INCREASING TO 6200-6700 FT AGL
IN THE AFTERNOON.
TRANSPORT WINDS.....EAST AROUND 5 MPH SHIFTING TO THE WEST IN THE
AFTERNOON.
SMOKE DISPERSAL.....160-680 (FAIR TO EXCELLENT).
PCPN AMOUNT.........NONE.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT).
MIN TEMPERATURE.....49-54.
24 HR TREND......5 DEGREES WARMER.
MAX HUMIDITY........95-100 PERCENT.
24 HR TREND......UNCHANGED.
20-FOOT WINDS.......LIGHT WINDS.
MIXING HEIGHT.......5600-6100 FT AGL DECREASING TO 0-500 FT AGL
AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.
SMOKE DISPERSAL.....40-530 (POOR TO GOOD).
PCPN AMOUNT.........NONE.
SATURDAY
SKY/WEATHER.........SUNNY (15-25 PERCENT) UNTIL 12 PM, THEN MOSTLY
CLOUDY (70-80 PERCENT).
MAX TEMPERATURE.....79-84.
24 HR TREND......4 DEGREES WARMER.
MIN HUMIDITY........43-48 PERCENT.
24 HR TREND......9 PERCENT WETTER.
20-FOOT WINDS.......SOUTHWEST WINDS 6 TO 11 MPH.
MIXING HEIGHT.......3800-4300 FT AGL INCREASING TO 7400-7900 FT AGL
IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH.
SMOKE DISPERSAL.....650 (EXCELLENT) INCREASING TO 1250 (EXCELLENT)
IN THE AFTERNOON.
PCPN AMOUNT.........NONE.
MIZ050-056-064-071-282015-
MUSKEGON-OTTAWA-ALLEGAN-VAN BUREN-
INCLUDING THE CITIES OF MUSKEGON, GRAND HAVEN, JENISON, HOLLAND,
AND SOUTH HAVEN
439 AM EDT FRI AUG 28 2026
TODAY
SKY/WEATHER.........SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....76-81.
24 HR TREND......UNCHANGED.
MIN HUMIDITY........40-45 PERCENT.
24 HR TREND......22 PERCENT DRIER.
20-FOOT WINDS.......LIGHT WINDS BECOMING SOUTHWEST AROUND 5 MPH IN
THE AFTERNOON.
MIXING HEIGHT.......NEAR LAKE MICHIGAN, 1200-1700 FT AGL INCREASING
TO 3500-4000 FT AGL IN THE AFTERNOON.
MIXING HEIGHT.......INLAND, 1500-2000 FT AGL INCREASING TO
6200-6700 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH SHIFTING TO THE WEST IN
THE AFTERNOON.
SMOKE DISPERSAL.....120-550 (POOR TO GOOD).
PCPN AMOUNT.........NONE.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT).
MIN TEMPERATURE.....56-61.
24 HR TREND......4 DEGREES WARMER.
MAX HUMIDITY........92-97 PERCENT.
24 HR TREND......UNCHANGED.
20-FOOT WINDS.......SOUTH WINDS 5 TO 6 MPH.
MIXING HEIGHT.......NEAR LAKE MICHIGAN, 1700-2200 FT AGL.
MIXING HEIGHT.......INLAND, 5700-6200 FT AGL DECREASING TO 0-400 FT
AGL AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
SMOKE DISPERSAL.....50-470 (POOR TO GOOD).
PCPN AMOUNT.........NONE.
SATURDAY
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT) UNTIL 3 PM, THEN
MOSTLY CLOUDY (75-85 PERCENT).
MAX TEMPERATURE.....77-82.
24 HR TREND......2 DEGREES WARMER.
MIN HUMIDITY........49-54 PERCENT.
24 HR TREND......14 PERCENT WETTER.
20-FOOT WINDS.......SOUTHWEST WINDS 5 TO 10 MPH.
MIXING HEIGHT.......NEAR LAKE MICHIGAN, 3500-4000 FT AGL.
MIXING HEIGHT.......INLAND, 3800-4300 FT AGL INCREASING TO
5900-6400 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH.
SMOKE DISPERSAL.....550-770 (GOOD TO EXCELLENT).
PCPN AMOUNT.........NONE TO 0.02 IN.
MIZ051-052-057>059-282015-
MONTCALM-GRATIOT-KENT-IONIA-CLINTON-
INCLUDING THE CITIES OF GREENVILLE, ALMA, GRAND RAPIDS, IONIA,
AND ST. JOHNS
439 AM EDT FRI AUG 28 2026
TODAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT). PATCHY FOG AFTER
7 AM UNTIL 8 AM.
MAX TEMPERATURE.....AROUND 80.
24 HR TREND......2 DEGREES COOLER.
MIN HUMIDITY........38-43 PERCENT.
24 HR TREND......2 PERCENT DRIER.
20-FOOT WINDS.......LIGHT WINDS.
MIXING HEIGHT.......1600-2100 FT AGL INCREASING TO 6300-6800 FT AGL
IN THE AFTERNOON.
TRANSPORT WINDS.....EAST AROUND 5 MPH SHIFTING TO THE WEST IN THE
AFTERNOON.
SMOKE DISPERSAL.....100 (POOR) INCREASING TO 690 (EXCELLENT) IN THE
AFTERNOON.
PCPN AMOUNT.........NONE.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT).
MIN TEMPERATURE.....54-59.
24 HR TREND......4 DEGREES WARMER.
MAX HUMIDITY........91-96 PERCENT.
24 HR TREND......UNCHANGED.
20-FOOT WINDS.......SOUTHWEST WINDS 5 TO 6 MPH.
MIXING HEIGHT.......5700-6200 FT AGL DECREASING TO 0-400 FT AGL
AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST AROUND 5 MPH.
SMOKE DISPERSAL.....40-570 (POOR TO GOOD).
PCPN AMOUNT.........NONE.
SATURDAY
SKY/WEATHER.........SUNNY (20-30 PERCENT) UNTIL 12 PM, THEN MOSTLY
CLOUDY (65-75 PERCENT).
MAX TEMPERATURE.....80-85.
24 HR TREND......3 DEGREES WARMER.
MIN HUMIDITY........43-48 PERCENT.
24 HR TREND......5 PERCENT WETTER.
20-FOOT WINDS.......SOUTHWEST WINDS 7 TO 12 MPH.
MIXING HEIGHT.......3800-4300 FT AGL INCREASING TO 7500-8000 FT AGL
IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 10 TO 15 MPH.
SMOKE DISPERSAL.....600-1140 (EXCELLENT).
PCPN AMOUNT.........NONE.
MIZ065>067-072>074-282015-
BARRY-EATON-INGHAM-KALAMAZOO-CALHOUN-JACKSON-
INCLUDING THE CITIES OF HASTINGS, CHARLOTTE, LANSING, KALAMAZOO,
BATTLE CREEK, AND JACKSON
439 AM EDT FRI AUG 28 2026
TODAY
SKY/WEATHER.........SUNNY (15-25 PERCENT). PATCHY FOG AFTER 7 AM
UNTIL 9 AM.
MAX TEMPERATURE.....AROUND 79.
24 HR TREND......UNCHANGED.
MIN HUMIDITY........36-41 PERCENT.
24 HR TREND......12 PERCENT DRIER.
20-FOOT WINDS.......LIGHT WINDS.
MIXING HEIGHT.......2100-2600 FT AGL INCREASING TO 6600-7100 FT AGL
IN THE AFTERNOON.
TRANSPORT WINDS.....EAST AROUND 5 MPH SHIFTING TO THE NORTHWEST IN
THE AFTERNOON.
SMOKE DISPERSAL.....140-470 (FAIR TO GOOD).
PCPN AMOUNT.........NONE.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (20-30 PERCENT).
MIN TEMPERATURE.....AROUND 58.
24 HR TREND......3 DEGREES WARMER.
MAX HUMIDITY........91-96 PERCENT.
24 HR TREND......UNCHANGED.
20-FOOT WINDS.......SOUTH WINDS UP TO 5 MPH.
MIXING HEIGHT.......5800-6300 FT AGL DECREASING TO 0-400 FT AGL
AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTHWEST 5 TO 10 MPH.
SMOKE DISPERSAL.....50-450 (POOR TO GOOD).
PCPN AMOUNT.........NONE.
SATURDAY
SKY/WEATHER.........SUNNY (20-30 PERCENT) UNTIL 12 PM, THEN PARTLY
SUNNY (60-70 PERCENT).
MAX TEMPERATURE.....AROUND 82.
24 HR TREND......2 DEGREES WARMER.
MIN HUMIDITY........39-44 PERCENT.
24 HR TREND......5 PERCENT WETTER.
20-FOOT WINDS.......SOUTHWEST WINDS 5 TO 10 MPH.
MIXING HEIGHT.......3600-4100 FT AGL INCREASING TO 6900-7400 FT AGL
IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST AROUND 10 MPH.
SMOKE DISPERSAL.....450-910 (GOOD TO EXCELLENT).
PCPN AMOUNT.........NONE.
FORECAST FOR DAYS 3 THROUGH 7
SATURDAY NIGHT
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN
THE MID 60S. SOUTH WINDS 5 TO 10 MPH.
SUNDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. HIGHS IN THE MID
80S. SOUTH WINDS 6 TO 11 MPH.
SUNDAY NIGHT
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN THE
UPPER 60S. SOUTH WINDS 5 TO 9 MPH.
MONDAY
PARTLY SUNNY. HIGHS IN THE MID 80S. SOUTHWEST WINDS 6 TO
11 MPH.
MONDAY NIGHT
PARTLY CLOUDY. CHANCE OF SHOWERS. LOWS AROUND 70.
SOUTHWEST WINDS 5 TO 10 MPH.
TUESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 80S. SOUTHWEST WINDS
6 TO 11 MPH.
TUESDAY NIGHT
PARTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN THE
UPPER 60S.
WEDNESDAY
MOSTLY SUNNY. CHANCE OF SHOWERS. HIGHS IN THE MID 80S.
WEDNESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 60S.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE MID 80S.
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