422
FNUS53 KGRR 170918
FWFGRR
FIRE WEATHER PLANNING FORECAST FOR SOUTHWEST LOWER MICHIGAN
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
518 AM EDT FRI APR 17 2026
..DENSE FOG THIS MORNING WITH SHOWERS AND STORMS THIS EVENING
DISCUSSION
CALM WINDS AND TRAPPED LOW LEVEL MOISTURE WILL KEEP DENSE FOG
OVER THE REGION THROUGH THE MORNING. A COLD FRONT WILL MOVE THROUGH THIS
EVENING INTO EARLY SATURDAY. STRONG TO SEVERE STORMS ARE POSSIBLE WITH
DAMAGING WINDS AND LARGE HAIL THE MAIN THREATS. COOLER AND DRIER AIR WILL
MOVE IN TOMORROW WITH GUSTY WINDS UPWARDS OF 30 TO 35 MPH POSSIBLE SATURDAY.
MIZ037>039-043>045-172030-
MASON-LAKE-OSCEOLA-OCEANA-NEWAYGO-MECOSTA-
INCLUDING THE CITIES OF LUDINGTON, BALDWIN, REED CITY, HART,
FREMONT, AND BIG RAPIDS
518 AM EDT FRI APR 17 2026
TODAY
SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT). WIDESPREAD DENSE
FOG UNTIL 11 AM.
MAX TEMPERATURE.....73-78.
24 HR TREND......10 DEGREES WARMER.
MIN HUMIDITY........51-56 PERCENT NEAR LAKE MICHIGAN AND 43-48
PERCENT INLAND.
24 HR TREND......28 PERCENT DRIER NEAR LAKE MICHIGAN AND 23
PERCENT DRIER INLAND.
20-FOOT WINDS.......LIGHT WINDS BECOMING SOUTH AROUND 11 MPH IN THE
AFTERNOON.
MIXING HEIGHT.......NEAR LAKE MICHIGAN, 1700-2200 FT AGL.
MIXING HEIGHT.......INLAND, 1200-1700 FT AGL INCREASING TO
3200-3700 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH AROUND 10 MPH INCREASING TO AROUND 20 MPH
IN THE AFTERNOON.
SMOKE DISPERSAL.....230-800 (FAIR TO EXCELLENT).
PCPN AMOUNT.........NONE.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT) UNTIL 9 PM, THEN
MOSTLY CLOUDY (75-85 PERCENT). CHANCE OF RAIN
SHOWERS AFTER 8 PM UNTIL 2 AM. CHANCE OF
THUNDERSTORMS AFTER 8 PM. RAIN SHOWERS AFTER 2
AM.
CHANCE OF PCPN......90 PERCENT.
MIN TEMPERATURE.....38-43.
24 HR TREND......5 DEGREES COOLER.
MAX HUMIDITY........98 PERCENT.
24 HR TREND......UNCHANGED.
20-FOOT WINDS.......SOUTH WINDS 10 TO 15 MPH WITH GUSTS TO AROUND
26 MPH.
MIXING HEIGHT.......1600-2100 FT AGL NEAR LAKE MICHIGAN AND
2500-3000 FT AGL INLAND.
TRANSPORT WINDS.....SOUTH AROUND 20 MPH.
SMOKE DISPERSAL.....260-650 (FAIR TO EXCELLENT).
PCPN AMOUNT.........0.16-0.52 IN.
SATURDAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) UNTIL 3 PM, THEN
MOSTLY SUNNY (45-55 PERCENT). RAIN SHOWERS
UNTIL 8 AM, THEN A CHANCE OF RAIN SHOWERS UNTIL
3 PM.
CHANCE OF PCPN......90 PERCENT UNTIL LATE AFTERNOON.
MAX TEMPERATURE.....52-57.
24 HR TREND......23 DEGREES COOLER.
MIN HUMIDITY........59-64 PERCENT NEAR LAKE MICHIGAN AND 50-55
PERCENT INLAND.
24 HR TREND......1 PERCENT WETTER NEAR LAKE MICHIGAN AND
UNCHANGED INLAND.
20-FOOT WINDS.......WEST WINDS 11 TO 16 MPH WITH GUSTS TO AROUND 26
MPH.
MIXING HEIGHT.......NEAR LAKE MICHIGAN, 3900-4400 FT AGL.
MIXING HEIGHT.......INLAND, 2400-2900 FT AGL INCREASING TO
4800-5300 FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 20 TO 25 MPH.
SMOKE DISPERSAL.....620 (EXCELLENT) INCREASING TO 1350 (EXCELLENT)
IN THE AFTERNOON.
PCPN AMOUNT.........0.08-0.28 IN.
MIZ040-046-172030-
CLARE-ISABELLA-
INCLUDING THE CITIES OF CLARE AND MOUNT PLEASANT
518 AM EDT FRI APR 17 2026
TODAY
SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT). WIDESPREAD DENSE
FOG UNTIL 12 PM.
MAX TEMPERATURE.....AROUND 72.
24 HR TREND......4 DEGREES WARMER.
MIN HUMIDITY........49-54 PERCENT.
24 HR TREND......8 PERCENT DRIER.
20-FOOT WINDS.......LIGHT WINDS BECOMING SOUTHEAST AROUND 9 MPH IN
THE AFTERNOON.
MIXING HEIGHT.......800-1300 FT AGL INCREASING TO 2900-3400 FT AGL
IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH INCREASING TO SOUTH
AROUND 15 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....170-620 (FAIR TO EXCELLENT).
PCPN AMOUNT.........NONE.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT) UNTIL 12 AM, THEN
MOSTLY CLOUDY (80-90 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS AFTER 8 PM UNTIL 2 AM. CHANCE OF
THUNDERSTORMS AFTER 11 PM. RAIN SHOWERS AFTER 2
AM.
CHANCE OF PCPN......90 PERCENT.
MIN TEMPERATURE.....40-45.
24 HR TREND......4 DEGREES COOLER.
MAX HUMIDITY........95-100 PERCENT.
24 HR TREND......UNCHANGED.
20-FOOT WINDS.......SOUTH WINDS 9 TO 14 MPH AND GUSTY.
MIXING HEIGHT.......2400-2900 FT AGL.
TRANSPORT WINDS.....SOUTH 15 TO 20 MPH.
SMOKE DISPERSAL.....230-560 (FAIR TO GOOD).
PCPN AMOUNT.........0.15-0.30 IN.
SATURDAY
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT). RAIN SHOWERS
UNTIL 2 PM.
CHANCE OF PCPN......90 PERCENT.
MAX TEMPERATURE.....56-61.
24 HR TREND......15 DEGREES COOLER.
MIN HUMIDITY........52-57 PERCENT.
24 HR TREND......UNCHANGED.
20-FOOT WINDS.......WEST WINDS 11 TO 16 MPH WITH GUSTS TO AROUND 26
MPH.
MIXING HEIGHT.......1700-2200 FT AGL INCREASING TO 4300-4800 FT AGL
IN THE AFTERNOON.
TRANSPORT WINDS.....WEST 20 TO 25 MPH.
SMOKE DISPERSAL.....590 (GOOD) INCREASING TO 1220 (EXCELLENT) IN
THE AFTERNOON.
PCPN AMOUNT.........0.12-0.21 IN.
MIZ050-056-064-071-172030-
MUSKEGON-OTTAWA-ALLEGAN-VAN BUREN-
INCLUDING THE CITIES OF MUSKEGON, GRAND HAVEN, JENISON, HOLLAND,
AND SOUTH HAVEN
518 AM EDT FRI APR 17 2026
TODAY
SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT). WIDESPREAD DENSE
FOG UNTIL 11 AM.
MAX TEMPERATURE.....74-79.
24 HR TREND......16 DEGREES WARMER.
MIN HUMIDITY........45-50 PERCENT.
24 HR TREND......40 PERCENT DRIER.
20-FOOT WINDS.......LIGHT WINDS BECOMING SOUTHEAST AROUND 10 MPH IN
THE AFTERNOON.
MIXING HEIGHT.......NEAR LAKE MICHIGAN, 1900-2400 FT AGL.
MIXING HEIGHT.......INLAND, 800-1300 FT AGL INCREASING TO 3900-4400
FT AGL IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTH 10 TO 15 MPH.
SMOKE DISPERSAL.....170 (FAIR) INCREASING TO 840 (EXCELLENT) IN THE
AFTERNOON.
PCPN AMOUNT.........NONE.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (50-60 PERCENT) UNTIL 12 AM, THEN
MOSTLY CLOUDY (80-90 PERCENT). CHANCE OF RAIN
SHOWERS AFTER 8 PM UNTIL 2 AM. CHANCE OF
THUNDERSTORMS AFTER 8 PM. RAIN SHOWERS AFTER 2
AM. PATCHY FOG AFTER 3 AM UNTIL 5 AM.
CHANCE OF PCPN......90 PERCENT.
MIN TEMPERATURE.....39-44.
24 HR TREND......3 DEGREES COOLER.
MAX HUMIDITY........95-100 PERCENT.
24 HR TREND......UNCHANGED.
20-FOOT WINDS.......SOUTH WINDS 10 TO 15 MPH WITH GUSTS TO AROUND
26 MPH.
MIXING HEIGHT.......NEAR LAKE MICHIGAN, 1800-2300 FT AGL.
MIXING HEIGHT.......INLAND, 3100-3600 FT AGL DECREASING TO 800-1300
FT AGL AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTH AROUND 20 MPH.
SMOKE DISPERSAL.....260-710 (FAIR TO EXCELLENT).
PCPN AMOUNT.........0.26-0.59 IN.
SATURDAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) UNTIL 3 PM, THEN
MOSTLY SUNNY (35-45 PERCENT). RAIN SHOWERS
UNTIL 8 AM, THEN A CHANCE OF RAIN SHOWERS UNTIL
5 PM.
CHANCE OF PCPN......90 PERCENT.
MAX TEMPERATURE.....54-59.
24 HR TREND......26 DEGREES COOLER.
MIN HUMIDITY........53-58 PERCENT.
24 HR TREND......5 PERCENT WETTER.
20-FOOT WINDS.......WEST WINDS 12 TO 17 MPH WITH GUSTS TO AROUND 28
MPH.
MIXING HEIGHT.......2100-2600 FT AGL INCREASING TO 4200-4700 FT AGL
IN THE AFTERNOON.
TRANSPORT WINDS.....NORTHWEST AROUND 25 MPH.
SMOKE DISPERSAL.....600 (EXCELLENT) INCREASING TO 1210 (EXCELLENT)
IN THE AFTERNOON.
PCPN AMOUNT.........0.13-0.33 IN.
MIZ051-052-057>059-172030-
MONTCALM-GRATIOT-KENT-IONIA-CLINTON-
INCLUDING THE CITIES OF GREENVILLE, ALMA, GRAND RAPIDS, IONIA,
AND ST. JOHNS
518 AM EDT FRI APR 17 2026
TODAY
SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT). WIDESPREAD DENSE
FOG UNTIL 11 AM.
MAX TEMPERATURE.....AROUND 75.
24 HR TREND......12 DEGREES WARMER.
MIN HUMIDITY........48-53 PERCENT.
24 HR TREND......26 PERCENT DRIER.
20-FOOT WINDS.......LIGHT WINDS BECOMING SOUTHEAST AROUND 9 MPH IN
THE AFTERNOON.
MIXING HEIGHT.......1100-1600 FT AGL INCREASING TO 3400-3900 FT AGL
IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH INCREASING TO SOUTH
AROUND 15 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....180-750 (FAIR TO EXCELLENT).
PCPN AMOUNT.........NONE.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT) UNTIL 12 AM, THEN
MOSTLY CLOUDY (80-90 PERCENT). CHANCE OF RAIN
SHOWERS AFTER 8 PM UNTIL 2 AM. CHANCE OF
THUNDERSTORMS AFTER 8 PM. RAIN SHOWERS AFTER 2
AM.
CHANCE OF PCPN......90 PERCENT.
MIN TEMPERATURE.....43-48.
24 HR TREND......4 DEGREES COOLER.
MAX HUMIDITY........95-100 PERCENT.
24 HR TREND......UNCHANGED.
20-FOOT WINDS.......SOUTH WINDS 12 TO 17 MPH WITH GUSTS TO AROUND
28 MPH.
MIXING HEIGHT.......2700-3200 FT AGL.
TRANSPORT WINDS.....SOUTH AROUND 20 MPH.
SMOKE DISPERSAL.....220-610 (FAIR TO EXCELLENT).
PCPN AMOUNT.........0.16-0.54 IN.
SATURDAY
SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT) UNTIL 3 PM, THEN
MOSTLY SUNNY (45-55 PERCENT). CHANCE OF
THUNDERSTORMS UNTIL 8 AM. RAIN SHOWERS UNTIL 2
PM.
CHANCE OF PCPN......90 PERCENT.
MAX TEMPERATURE.....58-63.
24 HR TREND......13 DEGREES COOLER.
MIN HUMIDITY........50-55 PERCENT.
24 HR TREND......3 PERCENT WETTER.
20-FOOT WINDS.......WEST WINDS 15 TO 20 MPH WITH GUSTS TO AROUND 30
MPH.
MIXING HEIGHT.......2000-2500 FT AGL INCREASING TO 4000-4500 FT AGL
IN THE AFTERNOON.
TRANSPORT WINDS.....WEST AROUND 25 MPH.
SMOKE DISPERSAL.....590 (GOOD) INCREASING TO 1200 (EXCELLENT) IN
THE AFTERNOON.
PCPN AMOUNT.........0.13-0.78 IN.
MIZ065>067-072>074-172030-
BARRY-EATON-INGHAM-KALAMAZOO-CALHOUN-JACKSON-
INCLUDING THE CITIES OF HASTINGS, CHARLOTTE, LANSING, KALAMAZOO,
BATTLE CREEK, AND JACKSON
518 AM EDT FRI APR 17 2026
TODAY
SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT). WIDESPREAD DENSE
FOG UNTIL 11 AM.
MAX TEMPERATURE.....73-78.
24 HR TREND......15 DEGREES WARMER.
MIN HUMIDITY........45-50 PERCENT.
24 HR TREND......31 PERCENT DRIER.
20-FOOT WINDS.......LIGHT WINDS BECOMING SOUTH AROUND 9 MPH IN THE
AFTERNOON.
MIXING HEIGHT.......1200-1700 FT AGL INCREASING TO 3900-4400 FT AGL
IN THE AFTERNOON.
TRANSPORT WINDS.....SOUTHEAST AROUND 5 MPH INCREASING TO SOUTH
AROUND 15 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....190-750 (FAIR TO EXCELLENT).
PCPN AMOUNT.........NONE.
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT) UNTIL 12 AM, THEN
MOSTLY CLOUDY (75-85 PERCENT). CHANCE OF RAIN
SHOWERS AFTER 8 PM UNTIL 2 AM. CHANCE OF
THUNDERSTORMS AFTER 11 PM. RAIN SHOWERS AFTER 2
AM.
CHANCE OF PCPN......90 PERCENT.
MIN TEMPERATURE.....43-48.
24 HR TREND......4 DEGREES COOLER.
MAX HUMIDITY........95-100 PERCENT.
24 HR TREND......UNCHANGED.
20-FOOT WINDS.......SOUTH WINDS 10 TO 15 MPH WITH GUSTS TO AROUND
26 MPH.
MIXING HEIGHT.......3100-3600 FT AGL DECREASING TO 900-1400 FT AGL
AFTER MIDNIGHT.
TRANSPORT WINDS.....SOUTH AROUND 20 MPH.
SMOKE DISPERSAL.....280-660 (FAIR TO EXCELLENT).
PCPN AMOUNT.........0.19-0.55 IN.
SATURDAY
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT). CHANCE OF
THUNDERSTORMS UNTIL 11 AM. RAIN SHOWERS UNTIL 2
PM, THEN A CHANCE OF RAIN SHOWERS.
CHANCE OF PCPN......90 PERCENT.
MAX TEMPERATURE.....62-67.
24 HR TREND......15 DEGREES COOLER.
MIN HUMIDITY........51-56 PERCENT.
24 HR TREND......3 PERCENT WETTER.
20-FOOT WINDS.......WEST WINDS 13 TO 18 MPH WITH GUSTS TO AROUND 28
MPH.
MIXING HEIGHT.......3500-4000 FT AGL.
TRANSPORT WINDS.....WEST AROUND 25 MPH.
SMOKE DISPERSAL.....530 (GOOD) INCREASING TO 1110 (EXCELLENT) IN
THE AFTERNOON.
PCPN AMOUNT.........0.19-0.56 IN.
FORECAST FOR DAYS 3 THROUGH 7
SATURDAY NIGHT
PARTLY CLOUDY. LOWS IN THE LOWER 30S. WEST WINDS
7 TO 12 MPH.
SUNDAY
MOSTLY SUNNY. HIGHS IN THE MID 40S. WEST WINDS 8 TO
13 MPH.
SUNDAY NIGHT
MOSTLY CLEAR. LOWS IN THE MID 20S. NORTHWEST WINDS
6 TO 11 MPH.
MONDAY
SUNNY. HIGHS IN THE UPPER 40S. NORTH WINDS 5 TO 6 MPH
SHIFTING TO THE WEST 5 TO 8 MPH IN THE AFTERNOON.
MONDAY NIGHT
NOT AS COOL. PARTLY CLOUDY. LOWS IN THE MID 30S.
SOUTH WINDS 5 TO 10 MPH.
TUESDAY
WARMER. MOSTLY SUNNY. HIGHS IN THE MID 60S. SOUTHWEST
WINDS 8 TO 13 MPH.
TUESDAY NIGHT
PARTLY CLOUDY. LOWS IN THE MID 40S.
WEDNESDAY
MOSTLY SUNNY. HIGHS IN THE UPPER 60S.
WEDNESDAY NIGHT
MOSTLY CLEAR. LOWS IN THE MID 40S.
THURSDAY
MOSTLY SUNNY. HIGHS IN THE LOWER 70S.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page