Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Grand Rapids, MI
Issued by NWS Grand Rapids, MI
238
FNUS53 KGRR 210831
FWFGRR
Fire Weather Planning Forecast for Southwest Lower Michigan
National Weather Service Grand Rapids MI
431 AM EDT Fri Aug 21 2026
...Showers with some storms this afternoon through Saturday...
.DISCUSSION...
South-southwest winds today will increase humidity with a chance
of hit-or-miss showers and thunderstorms from this afternoon
into Saturday.
MIZ037>039-043>045-212030-
Mason-Lake-Osceola-Oceana-Newaygo-Mecosta-
Including the cities of Ludington, Baldwin, Reed City, Hart,
Fremont, and Big Rapids
431 AM EDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Mostly sunny (40-50 percent) until 12 PM, then
mostly cloudy (70-80 percent). Chance of rain
showers and a slight chance of thunderstorms
after 2 PM.
Chance of pcpn......30 percent in the afternoon.
Max temperature.....77-82.
24 hr trend......1 degree cooler.
Min humidity........60-65 percent near Lake Michigan and 50-55
percent Inland.
24 hr trend......23 percent wetter near Lake Michigan and 22
percent wetter Inland.
20-foot winds.......South winds 6 to 11 mph. Gusts up to 21 mph in
the afternoon.
Mixing height.......Near Lake Michigan, 3300-3800 ft AGL.
Mixing height.......Inland, 2100-2600 ft AGL increasing to
4700-5200 ft AGL in the afternoon.
Transport winds.....South 10 to 15 mph.
Smoke dispersal.....380-870 (good to excellent).
Pcpn Amount.........none to 0.07 in.
.TONIGHT...
Sky/weather.........Partly cloudy (60-70 percent) until 12 AM, then
mostly cloudy (70-80 percent). Chance of rain
showers until 3 AM. Chance of thunderstorms.
Rain showers likely after 3 AM.
Chance of pcpn......60 percent.
Min temperature.....55-60.
24 hr trend......5 degrees warmer.
Max humidity........100 percent.
24 hr trend......Unchanged.
20-foot winds.......Southwest winds around 7 mph in the evening
becoming light.
Mixing height.......Near Lake Michigan, 1900-2400 ft AGL.
Mixing height.......Inland, 3500-4000 ft AGL decreasing to 700-1200
ft AGL after midnight.
Transport winds.....Southwest around 10 mph.
Smoke dispersal.....710 (excellent) decreasing to 70 (poor) after
midnight.
Pcpn Amount.........0.02-0.43 in.
.SATURDAY...
Sky/weather.........Partly sunny (60-70 percent) until 3 PM, then
sunny (15-25 percent). Chance of rain showers
until 11 AM. Chance of rain showers after 1 PM.
Chance of pcpn......50 percent.
Max temperature.....73-78.
24 hr trend......4 degrees cooler.
Min humidity........64-69 percent near Lake Michigan and 54-59
percent Inland.
24 hr trend......Unchanged near Lake Michigan and 2 percent
wetter Inland.
20-foot winds.......Northwest winds 6 to 11 mph. Gusts up to 22 mph
in the afternoon.
Mixing height.......Near Lake Michigan, 3000-3500 ft AGL.
Mixing height.......Inland, 2100-2600 ft AGL increasing to
5800-6300 ft AGL in the afternoon.
Transport winds.....Northwest 10 to 15 mph.
Smoke dispersal.....360 (good) increasing to 980 (excellent) in the
afternoon.
Pcpn Amount.........0.01-0.31 in.
$$
MIZ040-046-212030-
Clare-Isabella-
Including the cities of Clare and Mount Pleasant
431 AM EDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Mostly sunny (45-55 percent) until 3 PM, then
mostly cloudy (70-80 percent).
Max temperature.....Around 81.
24 hr trend......1 degree cooler.
Min humidity........46-51 percent.
24 hr trend......17 percent wetter.
20-foot winds.......Light winds becoming south around 10 mph in the
afternoon.
Mixing height.......2300-2800 ft AGL increasing to 6300-6800 ft AGL
in the afternoon.
Transport winds.....South 10 to 15 mph.
Smoke dispersal.....340 (good) increasing to 1050 (excellent) in
the afternoon.
Pcpn Amount.........none to 0.01 in.
.TONIGHT...
Sky/weather.........Partly cloudy (55-65 percent) until 3 AM, then
mostly cloudy (75-85 percent). Chance of rain
showers until 4 AM. Chance of thunderstorms.
Rain showers likely after 4 AM.
Chance of pcpn......60 percent.
Min temperature.....52-57.
24 hr trend......5 degrees warmer.
Max humidity........100 percent.
24 hr trend......Unchanged.
20-foot winds.......South winds around 5 mph in the evening
becoming light.
Mixing height.......4600-5100 ft AGL decreasing to 100-600 ft AGL
after midnight.
Transport winds.....Southwest 5 to 10 mph.
Smoke dispersal.....770 (excellent) decreasing to 40 (poor) after
midnight.
Pcpn Amount.........0.01-0.12 in.
.SATURDAY...
Sky/weather.........Partly sunny (55-65 percent). Rain showers
likely until 9 AM. Chance of thunderstorms.
Chance of rain showers after 9 AM.
Chance of pcpn......70 percent.
Max temperature.....74-79.
24 hr trend......4 degrees cooler.
Min humidity........56-61 percent.
24 hr trend......10 percent wetter.
20-foot winds.......Light winds becoming northwest around 11 mph in
the afternoon.
Mixing height.......1600-2100 ft AGL increasing to 5500-6000 ft AGL
in the afternoon.
Transport winds.....West around 5 mph increasing to northwest
around 15 mph in the afternoon.
Smoke dispersal.....190 (fair) increasing to 900 (excellent) in the
afternoon.
Pcpn Amount.........0.04-0.31 in.
$$
MIZ050-056-064-071-212030-
Muskegon-Ottawa-Allegan-Van Buren-
Including the cities of Muskegon, Grand Haven, Jenison, Holland,
and South Haven
431 AM EDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Mostly sunny (45-55 percent) until 3 PM, then
mostly cloudy (70-80 percent).
Max temperature.....76-81.
24 hr trend......1 degree cooler.
Min humidity........58-63 percent.
24 hr trend......8 percent wetter.
20-foot winds.......South winds 5 to 9 mph.
Mixing height.......Near Lake Michigan, 2600-3100 ft AGL.
Mixing height.......Inland, 1900-2400 ft AGL increasing to
4500-5000 ft AGL in the afternoon.
Transport winds.....South around 10 mph.
Smoke dispersal.....300-590 (good).
Pcpn Amount.........none to 0.02 in.
.TONIGHT...
Sky/weather.........Partly cloudy (55-65 percent). Chance of
showers until 12 AM. Chance of thunderstorms.
Showers likely after 12 AM.
Chance of pcpn......60 percent.
Min temperature.....60-65.
24 hr trend......5 degrees warmer.
Max humidity........99 percent.
24 hr trend......Unchanged.
20-foot winds.......Southwest winds around 5 mph in the evening
becoming light.
Mixing height.......Near Lake Michigan, 2100-2600 ft AGL.
Mixing height.......Inland, 3200-3700 ft AGL decreasing to 700-1200
ft AGL after midnight.
Transport winds.....Southwest 5 to 10 mph.
Smoke dispersal.....50-410 (poor to good).
Pcpn Amount.........0.02-0.28 in.
.SATURDAY...
Sky/weather.........Partly sunny (55-65 percent) until 3 PM, then
sunny (20-30 percent). Showers likely until 8
AM. Chance of thunderstorms until 3 PM. Chance
of showers after 8 AM until 3 PM.
Chance of pcpn......70 percent until late afternoon.
Max temperature.....73-78.
24 hr trend......3 degrees cooler.
Min humidity........58-63 percent.
24 hr trend......9 percent wetter.
20-foot winds.......West winds around 5 mph shifting to the
northwest around 13 mph with higher gusts in
the afternoon.
Mixing height.......Near Lake Michigan, 3400-3900 ft AGL.
Mixing height.......Inland, 2000-2500 ft AGL increasing to
5600-6100 ft AGL in the afternoon.
Transport winds.....Northwest 10 to 15 mph.
Smoke dispersal.....320 (good) increasing to 970 (excellent) in the
afternoon.
Pcpn Amount.........0.02-0.29 in.
$$
MIZ051-052-057>059-212030-
Montcalm-Gratiot-Kent-Ionia-Clinton-
Including the cities of Greenville, Alma, Grand Rapids, Ionia,
and St. Johns
431 AM EDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Mostly sunny (30-40 percent) until 3 PM, then
mostly cloudy (70-80 percent).
Max temperature.....78-83.
24 hr trend......Unchanged.
Min humidity........47-52 percent.
24 hr trend......18 percent wetter.
20-foot winds.......South winds 6 to 11 mph. Gusts up to 20 mph in
the afternoon.
Mixing height.......2100-2600 ft AGL increasing to 6200-6700 ft AGL
in the afternoon.
Transport winds.....South 10 to 15 mph.
Smoke dispersal.....310 (good) increasing to 950 (excellent) in the
afternoon.
Pcpn Amount.........none to 0.01 in.
.TONIGHT...
Sky/weather.........Partly cloudy (55-65 percent). Chance of
showers after 8 PM until 3 AM. Chance of
thunderstorms after 8 PM. Showers likely after
3 AM.
Chance of pcpn......60 percent.
Min temperature.....58-63.
24 hr trend......5 degrees warmer.
Max humidity........100 percent.
24 hr trend......Unchanged.
20-foot winds.......Southwest winds around 6 mph in the evening
becoming light.
Mixing height.......4400-4900 ft AGL decreasing to 200-700 ft AGL
after midnight.
Transport winds.....Southwest 5 to 10 mph.
Smoke dispersal.....630 (excellent) decreasing to 50 (poor) after
midnight.
Pcpn Amount.........none to 0.09 in.
.SATURDAY...
Sky/weather.........Partly sunny (60-70 percent). Rain showers
likely until 10 AM. Chance of thunderstorms.
Chance of rain showers after 10 AM.
Chance of pcpn......60 percent.
Max temperature.....Around 77.
24 hr trend......4 degrees cooler.
Min humidity........56-61 percent.
24 hr trend......7 percent wetter.
20-foot winds.......Southwest winds around 5 mph shifting to the
northwest around 12 mph with higher gusts in
the afternoon.
Mixing height.......2100-2600 ft AGL increasing to 6100-6600 ft AGL
in the afternoon.
Transport winds.....Southwest around 10 mph shifting to the
northwest in the afternoon.
Smoke dispersal.....240 (fair) increasing to 1020 (excellent) in
the afternoon.
Pcpn Amount.........0.02-0.41 in.
$$
MIZ065>067-072>074-212030-
Barry-Eaton-Ingham-Kalamazoo-Calhoun-Jackson-
Including the cities of Hastings, Charlotte, Lansing, Kalamazoo,
Battle Creek, and Jackson
431 AM EDT Fri Aug 21 2026
.TODAY...
Sky/weather.........Mostly sunny (25-35 percent) until 3 PM, then
mostly cloudy (65-75 percent).
Max temperature.....Around 81.
24 hr trend......1 degree warmer.
Min humidity........47-52 percent.
24 hr trend......15 percent wetter.
20-foot winds.......South winds 5 to 9 mph.
Mixing height.......2600-3100 ft AGL increasing to 5800-6300 ft AGL
in the afternoon.
Transport winds.....South around 10 mph.
Smoke dispersal.....340-720 (good to excellent).
Pcpn Amount.........none to 0.06 in.
.TONIGHT...
Sky/weather.........Partly cloudy (50-60 percent). Chance of
showers. Slight chance of thunderstorms after 8
PM.
Chance of pcpn......50 percent.
Min temperature.....Around 60.
24 hr trend......5 degrees warmer.
Max humidity........100 percent.
24 hr trend......Unchanged.
20-foot winds.......South winds around 5 mph in the evening
becoming light.
Mixing height.......3800-4300 ft AGL decreasing to 600-1100 ft AGL
after midnight.
Transport winds.....South 5 to 10 mph.
Smoke dispersal.....50-420 (poor to good).
Pcpn Amount.........None to 0.11 in.
.SATURDAY...
Sky/weather.........Partly sunny (60-70 percent). Chance of rain
showers until 12 PM. Chance of thunderstorms.
Rain showers after 12 PM.
Chance of pcpn......90 percent.
Max temperature.....Around 77.
24 hr trend......5 degrees cooler.
Min humidity........62-67 percent.
24 hr trend......8 percent wetter.
20-foot winds.......Southwest winds around 5 mph shifting to the
northwest with higher gusts in the afternoon.
Mixing height.......2100-2600 ft AGL increasing to 5500-6000 ft AGL
in the afternoon.
Transport winds.....Southwest around 10 mph shifting to the
northwest in the afternoon.
Smoke dispersal.....220 (fair) increasing to 890 (excellent) in the
afternoon.
Pcpn Amount.........0.02-0.31 in.
$$
.FORECAST FOR DAYS 3 THROUGH 7...
.SATURDAY NIGHT...Mostly clear. Lows in the mid 50s. Northwest winds
6 to 11 mph.
.SUNDAY...Sunny. Highs in the mid 70s. Northwest winds 7 to 12 mph.
.SUNDAY NIGHT...Mostly clear. Lows in the upper 40s. Northwest winds
5 to 8 mph.
.MONDAY...Sunny. Highs in the mid 70s. Northwest winds 5 to 10 mph.
.MONDAY NIGHT...Mostly clear. Lows in the lower 50s. Northwest winds
5 to 7 mph in the evening becoming light.
.TUESDAY...Mostly sunny. Highs in the upper 70s. Southwest winds
5 to 9 mph.
.TUESDAY NIGHT...Partly cloudy. Lows in the upper 50s.
.WEDNESDAY...Partly sunny with a chance of showers. Chance of
thunderstorms. Highs around 80.
.WEDNESDAY NIGHT...Chance of thunderstorms in the evening. Partly
cloudy with a chance of showers. Lows in the upper 50s.
.THURSDAY...Mostly sunny. Highs in the upper 70s.
$$