Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS Grand Rapids, MI
Issued by NWS Grand Rapids, MI
366
FNUS53 KGRR 181930
FWFGRR
Fire Weather Planning Forecast for Southwest Lower Michigan
National Weather Service Grand Rapids MI
330 PM EDT Fri Sep 18 2026
...Rounds of Heavy Rain Possible Tonight into Sunday...
.DISCUSSION...
Heavy rain is likely across Southern Lower Michigan. All areas will
see periods of rain this weekend. Locations from Grand Haven and
Grand Rapids southward may see flooding.
MIZ037>039-043>045-190815-
Mason-Lake-Osceola-Oceana-Newaygo-Mecosta-
Including the cities of Ludington, Baldwin, Reed City, Hart,
Fremont, and Big Rapids
330 PM EDT Fri Sep 18 2026
.TONIGHT...
Sky/weather.........Cloudy (90-100 percent). Chance of rain showers
until 5 AM, then rain showers likely and a
slight chance of thunderstorms.
Chance of pcpn......60 percent.
Min temperature.....43-48.
24 hr trend......1 degree cooler.
Max humidity........95-100 percent.
24 hr trend......Unchanged.
20-foot winds.......East winds 5 to 9 mph.
Mixing height.......2600-3100 ft AGL.
Transport winds.....East 10 to 15 mph.
Smoke dispersal.....180-330 (fair to good).
Pcpn Amount.........0.04-0.41 in.
.SATURDAY...
Sky/weather.........Cloudy (85-95 percent). Rain showers likely and
a slight chance of thunderstorms until 2 PM,
then a chance of rain showers. Slight chance of
thunderstorms after 5 PM.
Chance of pcpn......70 percent.
Max temperature.....62-67.
24 hr trend......9 degrees cooler.
Min humidity........70-75 percent.
24 hr trend......25 percent wetter.
20-foot winds.......East winds 7 to 12 mph with higher gusts.
Mixing height.......1100-1600 ft AGL.
Transport winds.....East around 15 mph.
Smoke dispersal.....210-240 (fair).
Pcpn Amount.........0.21-0.90 in.
.SATURDAY NIGHT...
Sky/weather.........Cloudy (85-95 percent). Chance of rain showers.
Chance of pcpn......40 percent.
Min temperature.....47-52.
24 hr trend......2 degrees warmer.
Max humidity........100 percent.
24 hr trend......Unchanged.
20-foot winds.......East winds 5 to 9 mph.
Mixing height.......900-1400 ft AGL.
Transport winds.....East around 10 mph.
Smoke dispersal.....120-180 (poor to fair).
Pcpn Amount.........0.05-0.32 in.
.SUNDAY...
Sky/weather.........Mostly cloudy (70-80 percent). Chance of rain
showers until 2 PM.
Chance of pcpn......30 percent until late afternoon.
Max temperature.....66-71.
24 hr trend......5 degrees warmer.
Min humidity........53-58 percent.
24 hr trend......17 percent drier.
20-foot winds.......Northeast winds 7 to 12 mph. Gusts up to 21 mph
in the afternoon.
Mixing height.......2300-2800 ft AGL increasing to 4400-4900 ft AGL
in the afternoon.
Transport winds.....Northeast around 15 mph.
Smoke dispersal.....490-840 (good to excellent).
Pcpn Amount.........none to 0.09 in.
$$
MIZ040-046-190815-
Clare-Isabella-
Including the cities of Clare and Mount Pleasant
330 PM EDT Fri Sep 18 2026
.TONIGHT...
Sky/weather.........Mostly cloudy (80-90 percent). Chance of rain
showers after 8 PM.
Chance of pcpn......40 percent.
Min temperature.....40-45.
24 hr trend......Unchanged.
Max humidity........95-100 percent.
24 hr trend......Unchanged.
20-foot winds.......East winds 5 to 9 mph.
Mixing height.......2800-3300 ft AGL decreasing to 800-1300 ft AGL
after midnight.
Transport winds.....East around 10 mph.
Smoke dispersal.....140-380 (fair to good).
Pcpn Amount.........0.01-0.11 in.
.SATURDAY...
Sky/weather.........Cloudy (85-95 percent). Chance of rain showers
until 8 AM, then rain showers likely and a
slight chance of thunderstorms until 2 PM, then
a chance of rain showers.
Chance of pcpn......70 percent.
Max temperature.....Around 63.
24 hr trend......5 degrees cooler.
Min humidity........70-75 percent.
24 hr trend......26 percent wetter.
20-foot winds.......East winds 5 to 9 mph.
Mixing height.......1100-1600 ft AGL.
Transport winds.....East 10 to 15 mph.
Smoke dispersal.....160-220 (fair).
Pcpn Amount.........0.14-0.57 in.
.SATURDAY NIGHT...
Sky/weather.........Cloudy (85-95 percent). Chance of rain showers.
Chance of pcpn......40 percent.
Min temperature.....46-51.
24 hr trend......4 degrees warmer.
Max humidity........100 percent.
24 hr trend......Unchanged.
20-foot winds.......East winds 5 to 9 mph.
Mixing height.......800-1300 ft AGL.
Transport winds.....East around 10 mph.
Smoke dispersal.....90-160 (poor to fair).
Pcpn Amount.........0.07-0.57 in.
.SUNDAY...
Sky/weather.........Partly sunny (65-75 percent). Chance of rain
showers until 8 AM.
Chance of pcpn......30 percent until late afternoon.
Max temperature.....Around 68.
24 hr trend......5 degrees warmer.
Min humidity........52-57 percent.
24 hr trend......18 percent drier.
20-foot winds.......Northeast winds 7 to 12 mph. Gusts up to 20 mph
in the afternoon.
Mixing height.......2300-2800 ft AGL increasing to 4600-5100 ft AGL
in the afternoon.
Transport winds.....Northeast around 15 mph.
Smoke dispersal.....540-870 (good to excellent).
Pcpn Amount.........none to 0.08 in.
$$
MIZ050-056-064-071-190815-
Muskegon-Ottawa-Allegan-Van Buren-
Including the cities of Muskegon, Grand Haven, Jenison, Holland,
and South Haven
330 PM EDT Fri Sep 18 2026
.TONIGHT...
Sky/weather.........Mostly cloudy (80-90 percent). Chance of rain
showers after 8 PM until 5 AM, then rain
showers likely and a slight chance of
thunderstorms.
Chance of pcpn......60 percent.
Min temperature.....49-54.
24 hr trend......1 degree cooler.
Max humidity........95-100 percent.
24 hr trend......Unchanged.
20-foot winds.......East winds 6 to 11 mph. Gusts up to 20 mph
after midnight.
Mixing height.......2400-2900 ft AGL.
Transport winds.....East 10 to 15 mph.
Smoke dispersal.....170-280 (fair).
Pcpn Amount.........0.11-0.42 in.
.SATURDAY...
Sky/weather.........Cloudy (85-95 percent). Rain showers and a
chance of thunderstorms.
Chance of pcpn......80 percent.
Max temperature.....69-74.
24 hr trend......7 degrees cooler.
Min humidity........78-83 percent.
24 hr trend......29 percent wetter.
20-foot winds.......Southeast winds 8 to 13 mph. Gusts up to 22 mph
in the morning.
Mixing height.......1100-1600 ft AGL.
Transport winds.....East around 15 mph.
Smoke dispersal.....230-240 (fair).
Pcpn Amount.........0.74-1.54 in.
.SATURDAY NIGHT...
Sky/weather.........Cloudy (85-95 percent). Rain showers likely
until 12 AM. Chance of thunderstorms. Rain
showers after 12 AM.
Chance of pcpn......90 percent.
Min temperature.....52-57.
24 hr trend......4 degrees warmer.
Max humidity........100 percent.
24 hr trend......Unchanged.
20-foot winds.......East winds 5 to 9 mph.
Mixing height.......700-1200 ft AGL.
Transport winds.....East around 10 mph.
Smoke dispersal.....110-160 (poor to fair).
Pcpn Amount.........0.17-1.93 in.
.SUNDAY...
Sky/weather.........Mostly cloudy (75-85 percent). Rain showers
likely until 8 AM, then a chance of rain
showers.
Chance of pcpn......60 percent.
Max temperature.....Around 68.
24 hr trend......2 degrees warmer.
Min humidity........59-64 percent.
24 hr trend......8 percent drier.
20-foot winds.......Northeast winds 8 to 13 mph. Gusts up to 23 mph
in the afternoon.
Mixing height.......1900-2400 ft AGL increasing to 4100-4600 ft AGL
in the afternoon.
Transport winds.....Northeast 15 to 20 mph.
Smoke dispersal.....420-740 (good to excellent).
Pcpn Amount.........0.04-0.43 in.
$$
MIZ051-052-057>059-190815-
Montcalm-Gratiot-Kent-Ionia-Clinton-
Including the cities of Greenville, Alma, Grand Rapids, Ionia,
and St. Johns
330 PM EDT Fri Sep 18 2026
.TONIGHT...
Sky/weather.........Mostly cloudy (80-90 percent). Chance of rain
showers after 8 PM. Slight chance of
thunderstorms after 5 AM.
Chance of pcpn......40 percent.
Min temperature.....48-53.
24 hr trend......2 degrees warmer.
Max humidity........95-100 percent.
24 hr trend......Unchanged.
20-foot winds.......East winds 6 to 11 mph.
Mixing height.......2600-3100 ft AGL.
Transport winds.....East around 15 mph.
Smoke dispersal.....170-370 (fair to good).
Pcpn Amount.........0.02-0.24 in.
.SATURDAY...
Sky/weather.........Cloudy (85-95 percent). Chance of rain showers
until 8 AM. Slight chance of thunderstorms.
Rain showers after 8 AM.
Chance of pcpn......80 percent.
Max temperature.....Around 64.
24 hr trend......8 degrees cooler.
Min humidity........77-82 percent.
24 hr trend......26 percent wetter.
20-foot winds.......East winds 6 to 11 mph.
Mixing height.......1100-1600 ft AGL.
Transport winds.....East around 15 mph.
Smoke dispersal.....170-230 (fair).
Pcpn Amount.........0.41-1.10 in.
.SATURDAY NIGHT...
Sky/weather.........Cloudy (85-95 percent). Rain showers.
Chance of pcpn......80 percent.
Min temperature.....52-57.
24 hr trend......3 degrees warmer.
Max humidity........100 percent.
24 hr trend......Unchanged.
20-foot winds.......East winds 5 to 10 mph.
Mixing height.......700-1200 ft AGL.
Transport winds.....East around 10 mph.
Smoke dispersal.....80-150 (poor to fair).
Pcpn Amount.........0.25-0.83 in.
.SUNDAY...
Sky/weather.........Mostly cloudy (70-80 percent). Chance of rain
showers.
Chance of pcpn......50 percent.
Max temperature.....Around 67.
24 hr trend......3 degrees warmer.
Min humidity........65-70 percent.
24 hr trend......5 percent drier.
20-foot winds.......Northeast winds 10 to 15 mph with higher gusts.
Mixing height.......4000-4500 ft AGL.
Transport winds.....Northeast 15 to 20 mph.
Smoke dispersal.....540-770 (good to excellent).
Pcpn Amount.........0.05-0.31 in.
$$
MIZ065>067-072>074-190815-
Barry-Eaton-Ingham-Kalamazoo-Calhoun-Jackson-
Including the cities of Hastings, Charlotte, Lansing, Kalamazoo,
Battle Creek, and Jackson
330 PM EDT Fri Sep 18 2026
.TONIGHT...
Sky/weather.........Partly cloudy (65-75 percent) until 12 AM, then
mostly cloudy (75-85 percent). Chance of rain
showers after 11 PM. Slight chance of
thunderstorms after 5 AM.
Chance of pcpn......30 percent in the late evening and
overnight.
Min temperature.....Around 54.
24 hr trend......Unchanged.
Max humidity........95-100 percent.
24 hr trend......Unchanged.
20-foot winds.......East winds 5 to 10 mph.
Mixing height.......3100-3600 ft AGL decreasing to 800-1300 ft AGL
after midnight.
Transport winds.....East around 10 mph.
Smoke dispersal.....170-330 (fair to good).
Pcpn Amount.........0.01-0.14 in.
.SATURDAY...
Sky/weather.........Cloudy (85-95 percent). Chance of rain showers
until 8 AM. Slight chance of thunderstorms.
Rain showers after 8 AM.
Chance of pcpn......80 percent.
Max temperature.....66-71.
24 hr trend......6 degrees cooler.
Min humidity........74-79 percent.
24 hr trend......21 percent wetter.
20-foot winds.......Southeast winds 6 to 11 mph.
Mixing height.......1300-1800 ft AGL.
Transport winds.....Southeast 10 to 15 mph.
Smoke dispersal.....180-220 (fair).
Pcpn Amount.........0.56-1.36 in.
.SATURDAY NIGHT...
Sky/weather.........Mostly cloudy (80-90 percent). Rain showers
likely until 12 AM. Rain showers after 12 AM.
Chance of pcpn......80 percent.
Min temperature.....55-60.
24 hr trend......3 degrees warmer.
Max humidity........100 percent.
24 hr trend......Unchanged.
20-foot winds.......East winds 5 to 8 mph.
Mixing height.......800-1300 ft AGL.
Transport winds.....Southeast around 10 mph shifting to the south
after midnight.
Smoke dispersal.....80-150 (poor to fair).
Pcpn Amount.........0.56-1.72 in.
.SUNDAY...
Sky/weather.........Mostly cloudy (75-85 percent). Rain showers
likely until 2 PM, then a chance of rain
showers.
Chance of pcpn......60 percent.
Max temperature.....Around 67.
24 hr trend......Unchanged.
Min humidity........72-77 percent.
24 hr trend......1 percent wetter.
20-foot winds.......Northeast winds 8 to 13 mph. Gusts up to 23 mph
in the afternoon.
Mixing height.......3200-3700 ft AGL.
Transport winds.....Northeast around 10 mph increasing to around 20
mph in the afternoon.
Smoke dispersal.....390-680 (good to excellent).
Pcpn Amount.........0.27-0.52 in.
$$
.FORECAST FOR DAYS 3 THROUGH 7...
.SUNDAY NIGHT...Mostly cloudy. Chance of showers in the evening.
Lows in the upper 40s. Northeast winds 6 to 11 mph.
.MONDAY...Mostly cloudy with a chance of showers. Highs in the lower
60s. Northeast winds 8 to 13 mph.
.MONDAY NIGHT...Mostly cloudy. Lows in the mid 40s. Northeast winds
7 to 12 mph.
.TUESDAY...Partly sunny. Highs in the lower 60s. Northeast winds
8 to 13 mph.
.TUESDAY NIGHT...Partly cloudy. Lows in the mid 40s. Northeast winds
7 to 12 mph.
.WEDNESDAY...Partly sunny. Highs in the lower 60s. Northeast winds
7 to 12 mph.
.WEDNESDAY NIGHT...Partly cloudy. Lows in the upper 40s.
.THURSDAY...Partly sunny. Highs in the upper 60s.
.THURSDAY NIGHT...Partly cloudy. Lows in the upper 40s.
.FRIDAY...Mostly sunny. Highs around 70.
$$