503
FNUS73 KGRR 020947
FWSGRR
SPOT FORECAST FOR IDLEWILD 5 AND 7...USFS
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
547 AM EDT SAT MAY 2 2026
FORECAST IS BASED ON IGNITION TIME OF 1000 EDT ON MAY 02.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE AT (616) 949-5150, IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
OUTSIDE OF SOME MORNING CLOUDS AROUND 6000 FEET, MOSTLY SUNNY
CONDITIONS ARE EXPECTED TODAY WITH MIXING HEIGHTS INCREASING TO
AROUND 7000 FEET THIS AFTERNOON. RELATIVE HUMIDITY VALUES WILL
FALL TO AROUND 30 LATE THIS AFTERNOON. NORTHERLY WINDS WILL
LARGELY BE 5 TO 15 MPH, BUT BETWEEN 6 TO 8 PM MIXING HEIGHTS COULD
BE DEEP ENOUGH TO MIX DOWN GUSTS TO 30 MPH BEFORE THE INVERSION
BUILDS IN.
REST OF TODAY
SKY/WEATHER.........SUNNY (5-15 PERCENT).
TEMPERATURE.........41 AT IGNITION...MAX 52.
RH..................50 PERCENT AT IGNITION...MIN 29 PERCENT.
WIND (20 FT)........WINDS NORTHWEST AT 5 MPH AT
IGNITION...OTHERWISE NORTHWEST WINDS 5 TO 8
MPH.
MIXING HEIGHT.......4200 FT AGL AT IGNITION...OTHERWISE 7100 FT
AGL.
MIXING WINDS........NORTHWEST 12 TO 16 MPH.
SMOKE DISPERSAL.....530 /GOOD/ AT IGNITION. MAX...1060 /EXCELLENT/.
TIME (EDT) 10 AM NOON 2 PM 4 PM 6 PM 8 PM
SKY (%).........12 9 12 6 4 24
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
TEMP............41 46 49 51 52 47
RH..............50 40 33 29 29 38
20 FT WIND......NW 5 NW 6 NW 8 NW 8 NW 7 W 3
20 FT WIND GUST.12 16 17 18 16 10
MIX HGT (FT)....4200 6000 7000 7000 5800 1400
MIXING WIND.....NW 13 NW 13 NW 13 NW 15 NW 16 W 7
SMOKE DISPRSL...530 760 880 1040 930 100
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (20-30 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS EARLY IN THE MORNING.
TEMPERATURE.........MIN 36.
RH..................MAX 73 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 6 TO 7 MPH EARLY IN THE EVENING
BECOMING LIGHT, THEN BECOMING SOUTHWEST 5 TO 6
MPH LATE IN THE EVENING.
MIXING HEIGHT.......500 FT AGL.
MIXING WINDS........NORTHWEST 7 TO 16 MPH SHIFTING TO THE SOUTHWEST
8 TO 15 MPH IN THE LATE EVENING AND OVERNIGHT.
SMOKE DISPERSAL.....930 (EXCELLENT) EARLY IN THE EVENING DECREASING
TO 40 (POOR) LATE IN THE NIGHT.
SUNDAY
SKY/WEATHER.........PARTLY SUNNY (65-75 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS EARLY IN THE MORNING, THEN CHANCE
OF RAIN SHOWERS EARLY IN THE MORNING. SLIGHT
CHANCE OF RAIN SHOWERS LATE IN THE AFTERNOON.
TEMPERATURE.........MAX 59.
RH..................MIN 53 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 6 TO 13 MPH. GUSTS UP TO 26 MPH
EARLY IN THE MORNING.
MIXING HEIGHT.......3900 FT AGL.
MIXING WINDS........SOUTHWEST 15 TO 23 MPH INCREASING TO 26 TO 30
MPH LATE IN THE MORNING.
SMOKE DISPERSAL.....110 (POOR) EARLY IN THE MORNING INCREASING TO
1120 (EXCELLENT) IN THE AFTERNOON.
FORECASTER...HANSEN
REQUESTED BY...JOE RASPOTNIK
TYPE OF REQUEST...PRESCRIBED
.TAG 2612403.0/GRR
.DELDT 05/02/26
.FORMATTERVERSION 2.0.0
.EMAIL DEAN.CHAMBERS@USDA.GOV,JOSEPH.RASPOTNIK@USDA.GOV
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