FNUS53 KGRR 181831 FWFGRR Fire Weather Planning Forecast for Southwest Lower Michigan National Weather Service Grand Rapids MI 231 PM EDT Mon May 18 2026 ...More Storms on Tuesday then Drying Out... .DISCUSSION... A cold front will bring another round of strong to severe thunderstorms on Tuesday afternoon. Cool high pressure builds in for Wednesday and Thursday with relative humidity dropping below 40 percent in the afternoon. MIZ037>039-043>045-190830- Mason-Lake-Osceola-Oceana-Newaygo-Mecosta- Including the cities of Ludington, Baldwin, Reed City, Hart, Fremont, and Big Rapids 231 PM EDT Mon May 18 2026 .TONIGHT... Sky/weather.........Partly cloudy (60-70 percent) until 9 PM, then mostly cloudy (75-85 percent). Chance of rain showers until 5 AM. Chance of thunderstorms after 12 AM. Rain showers likely after 5 AM. Chance of pcpn......60 percent. Min temperature.....53-58 near Lake Michigan and around 63 Inland. 24 hr trend......4 degrees cooler near Lake Michigan and 3 degrees cooler Inland. Max humidity........95-100 percent. 24 hr trend......15 percent wetter. 20-foot winds.......Southwest winds 9 to 14 mph with gusts to around 27 mph. Mixing height.......800-1300 ft AGL near Lake Michigan and 2000-2500 ft AGL Inland. Transport winds.....Southwest around 15 mph. Smoke dispersal.....160-460 (fair to good). Pcpn Amount.........0.04-0.19 in. .TUESDAY... Sky/weather.........Partly sunny (55-65 percent). Rain showers and a chance of thunderstorms. Chance of pcpn......80 percent. Max temperature.....76-81. 24 hr trend......7 degrees cooler. Min humidity........54-59 percent. 24 hr trend......10 percent wetter. 20-foot winds.......Southwest winds 13 to 18 mph with gusts to around 31 mph. Mixing height.......1200-1700 ft AGL near Lake Michigan and 3000-3500 ft AGL Inland. Transport winds.....Southwest 20 to 25 mph. Smoke dispersal.....720-1090 (excellent). Pcpn Amount.........0.05-0.13 in. .TUESDAY NIGHT... Sky/weather.........Partly cloudy (65-75 percent) until 9 PM, then mostly cloudy (70-80 percent) until 3 AM, then partly cloudy (50-60 percent). Rain showers until 8 PM. Chance of pcpn......80 percent early in the evening. Min temperature.....38-43. 24 hr trend......20 degrees cooler. Max humidity........78-83 percent. 24 hr trend......17 percent drier. 20-foot winds.......Northwest winds 7 to 12 mph. Gusts up to 22 mph in the evening. Mixing height.......1200-1700 ft AGL near Lake Michigan and 2100-2600 ft AGL Inland. Transport winds.....Northwest around 15 mph. Smoke dispersal.....360-630 (good to excellent). Pcpn Amount.........none to 0.03 in. .WEDNESDAY... Sky/weather.........Sunny (20-30 percent). Max temperature.....56-61. 24 hr trend......21 degrees cooler. Min humidity........45-50 percent near Lake Michigan and 35-40 percent Inland. 24 hr trend......17 percent drier near Lake Michigan and 23 percent drier Inland. 20-foot winds.......North winds 7 to 12 mph and gusty. Mixing height.......3200-3700 ft AGL near Lake Michigan and 4900-5400 ft AGL Inland. Transport winds.....North around 15 mph. Smoke dispersal.....690-820 (excellent). Pcpn Amount.........None. $$ MIZ040-046-190830- Clare-Isabella- Including the cities of Clare and Mount Pleasant 231 PM EDT Mon May 18 2026 .TONIGHT... Sky/weather.........Mostly cloudy (65-75 percent) until 9 PM, then partly cloudy (65-75 percent) until 12 AM, then mostly cloudy (70-80 percent). Chance of thunderstorms until 8 PM. Chance of showers. Slight chance of thunderstorms after 8 PM. Chance of pcpn......40 percent. Min temperature.....Around 63. 24 hr trend......14 degrees warmer. Max humidity........95-100 percent. 24 hr trend......Unchanged. 20-foot winds.......Southwest winds 7 to 12 mph and gusty. Mixing height.......1500-2000 ft AGL. Transport winds.....Southwest around 15 mph. Smoke dispersal.....150-350 (fair to good). Pcpn Amount.........0.05-0.22 in. .TUESDAY... Sky/weather.........Partly sunny (55-65 percent). Chance of showers and a slight chance of thunderstorms until 11 AM, then showers. Slight chance of thunderstorms after 2 PM. Chance of pcpn......80 percent. Max temperature.....79-84. 24 hr trend......5 degrees cooler. Min humidity........53-58 percent. 24 hr trend......8 percent wetter. 20-foot winds.......Southwest winds 14 to 19 mph with gusts to around 31 mph. Mixing height.......4000-4500 ft AGL. Transport winds.....Southwest around 20 mph increasing to around 30 mph in the afternoon. Smoke dispersal.....780 (excellent) increasing to 1380 (excellent) in the afternoon. Pcpn Amount.........none to 0.10 in. .TUESDAY NIGHT... Sky/weather.........Partly cloudy (60-70 percent) until 9 PM, then mostly cloudy (70-80 percent) until 3 AM, then partly cloudy (60-70 percent). Rain showers until 8 PM. Chance of pcpn......80 percent early in the evening. Min temperature.....38-43. 24 hr trend......20 degrees cooler. Max humidity........77-82 percent. 24 hr trend......17 percent drier. 20-foot winds.......Northwest winds 8 to 13 mph. Gusts up to 25 mph in the evening. Mixing height.......2600-3100 ft AGL. Transport winds.....Northwest 15 to 20 mph. Smoke dispersal.....410-780 (good to excellent). Pcpn Amount.........none to 0.04 in. .WEDNESDAY... Sky/weather.........Mostly sunny (25-35 percent). Max temperature.....56-61. 24 hr trend......22 degrees cooler. Min humidity........38-43 percent. 24 hr trend......19 percent drier. 20-foot winds.......Northwest winds 7 to 12 mph. Gusts up to 20 mph in the morning. Mixing height.......5000-5500 ft AGL. Transport winds.....Northwest around 15 mph. Smoke dispersal.....660-850 (excellent). Pcpn Amount.........None. $$ MIZ050-056-064-071-190830- Muskegon-Ottawa-Allegan-Van Buren- Including the cities of Muskegon, Grand Haven, Jenison, Holland, and South Haven 231 PM EDT Mon May 18 2026 .TONIGHT... Sky/weather.........Mostly cloudy (65-75 percent) until 9 PM, then partly cloudy (65-75 percent) until 3 AM, then mostly cloudy (70-80 percent). Slight chance of thunderstorms until 8 PM. Chance of rain showers. Chance of thunderstorms after 8 PM. Chance of pcpn......30 percent. Min temperature.....57-62 near Lake Michigan and around 65 Inland. 24 hr trend......3 degrees cooler near Lake Michigan and 1 degree cooler Inland. Max humidity........92-97 percent. 24 hr trend......19 percent wetter. 20-foot winds.......South winds 9 to 14 mph with gusts to around 26 mph. Mixing height.......500-1000 ft AGL near Lake Michigan and 1600-2100 ft AGL Inland. Transport winds.....Southwest 15 to 20 mph. Smoke dispersal.....160-450 (fair to good). Pcpn Amount.........0.05-0.14 in. .TUESDAY... Sky/weather.........Partly sunny (50-60 percent). Chance of rain showers until 2 PM. Chance of thunderstorms. Rain showers after 2 PM. Chance of pcpn......80 percent. Max temperature.....79-84. 24 hr trend......3 degrees cooler. Min humidity........55-60 percent. 24 hr trend......5 percent wetter. 20-foot winds.......Southwest winds 14 to 19 mph with gusts to around 32 mph. Mixing height.......1600-2100 ft AGL near Lake Michigan and 4100-4600 ft AGL Inland. Transport winds.....Southwest 20 to 25 mph. Smoke dispersal.....700 (excellent) increasing to 1310 (excellent) in the afternoon. Pcpn Amount.........0.05-0.17 in. .TUESDAY NIGHT... Sky/weather.........Mostly cloudy (75-85 percent) until 3 AM, then partly cloudy (60-70 percent). Rain showers until 8 PM. Chance of thunderstorms until 10 PM. Chance of pcpn......80 percent in the evening. Min temperature.....44-49. 24 hr trend......18 degrees cooler. Max humidity........82-87 percent. 24 hr trend......Unchanged. 20-foot winds.......Northwest winds 6 to 11 mph. Gusts up to 20 mph in the evening. Mixing height.......1100-1600 ft AGL near Lake Michigan and 2100-2600 ft AGL Inland. Transport winds.....Northwest around 15 mph. Smoke dispersal.....250-510 (fair to good). Pcpn Amount.........none to 0.07 in. .WEDNESDAY... Sky/weather.........Mostly sunny (40-50 percent). Max temperature.....59-64. 24 hr trend......21 degrees cooler. Min humidity........39-44 percent. 24 hr trend......16 percent drier. 20-foot winds.......North winds 7 to 12 mph. Mixing height.......3600-4100 ft AGL near Lake Michigan and 4900-5400 ft AGL Inland. Transport winds.....North around 15 mph. Smoke dispersal.....630-760 (excellent). Pcpn Amount.........None. $$ MIZ051-052-057>059-190830- Montcalm-Gratiot-Kent-Ionia-Clinton- Including the cities of Greenville, Alma, Grand Rapids, Ionia, and St. Johns 231 PM EDT Mon May 18 2026 .TONIGHT... Sky/weather.........Mostly cloudy (70-80 percent) until 9 PM, then partly cloudy (55-65 percent) until 3 AM, then mostly cloudy (70-80 percent). Chance of thunderstorms until 8 PM. Chance of showers. Chance of thunderstorms after 8 PM. Chance of pcpn......30 percent. Min temperature.....Around 66. 24 hr trend......Unchanged. Max humidity........92-97 percent. 24 hr trend......Unchanged. 20-foot winds.......Southwest winds 11 to 16 mph with gusts to around 27 mph. Mixing height.......1700-2200 ft AGL. Transport winds.....Southwest 15 to 20 mph. Smoke dispersal.....150-440 (fair to good). Pcpn Amount.........0.07-0.19 in. .TUESDAY... Sky/weather.........Partly sunny (50-60 percent). Chance of showers until 11 AM. Chance of thunderstorms. Showers after 11 AM. Chance of pcpn......90 percent. Max temperature.....80-85. 24 hr trend......4 degrees cooler. Min humidity........51-56 percent. 24 hr trend......5 percent wetter. 20-foot winds.......Southwest winds 17 to 22 mph with gusts to around 35 mph. Mixing height.......2700-3200 ft AGL increasing to 4700-5200 ft AGL in the afternoon. Transport winds.....Southwest around 20 mph increasing to around 30 mph in the afternoon. Smoke dispersal.....810 (excellent) increasing to 1780 (excellent) in the afternoon. Pcpn Amount.........0.06-0.16 in. .TUESDAY NIGHT... Sky/weather.........Mostly cloudy (75-85 percent) until 3 AM, thenpartly cloudy (60-70 percent). Rain showers until 8 PM. Chance of thunderstorms until 10 PM. Chance of pcpn......90 percent in the evening. Min temperature.....44-49. 24 hr trend......18 degrees cooler. Max humidity........78-83 percent. 24 hr trend......10 percent drier. 20-foot winds.......Northwest winds 9 to 14 mph. Gusts up to 26 mph in the evening. Mixing height.......2700-3200 ft AGL. Transport winds.....Northwest 15 to 20 mph. Smoke dispersal.....300-820 (good to excellent). Pcpn Amount.........none to 0.07 in. .WEDNESDAY... Sky/weather.........Mostly sunny (30-40 percent). Max temperature.....59-64. 24 hr trend......23 degrees cooler. Min humidity........38-43 percent. 24 hr trend......11 percent drier. 20-foot winds.......North winds 8 to 13 mph. Mixing height.......5000-5500 ft AGL. Transport winds.....North around 15 mph. Smoke dispersal.....610-820 (excellent). Pcpn Amount.........None. $$ MIZ065>067-072>074-190830- Barry-Eaton-Ingham-Kalamazoo-Calhoun-Jackson- Including the cities of Hastings, Charlotte, Lansing, Kalamazoo, Battle Creek, and Jackson 231 PM EDT Mon May 18 2026 .TONIGHT... Sky/weather.........Mostly cloudy (75-85 percent) until 9 PM, then partly cloudy (60-70 percent). Chance of thunderstorms until 8 PM. Chance of showers. Chance of thunderstorms after 8 PM. Chance of pcpn......30 percent. Min temperature.....Around 66. 24 hr trend......Unchanged. Max humidity........88-93 percent. 24 hr trend......11 percent wetter. 20-foot winds.......Southwest winds 10 to 15 mph with gusts to around 26 mph. Mixing height.......1500-2000 ft AGL. Transport winds.....Southwest 15 to 20 mph. Smoke dispersal.....140-420 (fair to good). Pcpn Amount.........0.08-0.17 in. .TUESDAY... Sky/weather.........Partly sunny (55-65 percent). Chance of showers until 2 PM. Chance of thunderstorms. Showers after 2 PM. Chance of pcpn......90 percent. Max temperature.....82-87. 24 hr trend......2 degrees cooler. Min humidity........51-56 percent. 24 hr trend......4 percent wetter. 20-foot winds.......Southwest winds 15 to 20 mph with gusts to around 31 mph. Mixing height.......2500-3000 ft AGL increasing to 4700-5200 ft AGL in the afternoon. Transport winds.....Southwest 20 to 25 mph. Smoke dispersal.....780 (excellent) increasing to 1480 (excellent) in the afternoon. Pcpn Amount.........0.10-0.26 in. .TUESDAY NIGHT... Sky/weather.........Mostly cloudy (75-85 percent) until 3 AM, then partly cloudy (55-65 percent). Rain showers until 8 PM. Chance of thunderstorms until 11 PM. Chance of rain showers after 8 PM until 11 PM. Chance of pcpn......90 percent in the evening. Min temperature.....47-52. 24 hr trend......16 degrees cooler. Max humidity........85-90 percent. 24 hr trend......Unchanged. 20-foot winds.......Northwest winds 8 to 13 mph. Gusts up to 23 mph in the evening. Mixing height.......2700-3200 ft AGL. Transport winds.....Northwest 15 to 20 mph. Smoke dispersal.....290-690 (fair to excellent). Pcpn Amount.........0.03-0.14 in. .WEDNESDAY... Sky/weather.........Mostly sunny (45-55 percent). Max temperature.....Around 63. 24 hr trend......21 degrees cooler. Min humidity........41-46 percent. 24 hr trend......9 percent drier. 20-foot winds.......North winds 7 to 12 mph. Mixing height.......5000-5500 ft AGL. Transport winds.....North around 15 mph. Smoke dispersal.....530-730 (good to excellent). Pcpn Amount.........None. $$ .FORECAST FOR DAYS 3 THROUGH 7... .WEDNESDAY NIGHT...Partly cloudy. Lows in the upper 30s. Northeast winds 5 to 10 mph. .THURSDAY...Mostly sunny. Highs in the lower 60s. East winds 5 to 10 mph. .THURSDAY NIGHT...Partly cloudy. Lows in the lower 40s. East winds 5 to 10 mph. .FRIDAY...Mostly cloudy. Chance of showers in the afternoon. Highs in the upper 60s. East winds 7 to 12 mph. .FRIDAY NIGHT...Mostly cloudy with a chance of showers. Lows around 50. East winds 8 to 13 mph. .SATURDAY...Mostly cloudy with a chance of showers. Highs around 70. East winds 6 to 11 mph. .SATURDAY NIGHT...Partly cloudy. Lows in the lower 50s. .SUNDAY...Partly sunny. Highs in the mid 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the mid 50s. .MEMORIAL DAY...Partly sunny. Highs around 80. $$