820
FNUS73 KGRR 300930
FWSGRR
SPOT FORECAST FOR FIREWHEELS 20 AND 24...USFS
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
530 AM EDT THU APR 30 2026
FORECAST IS BASED ON IGNITION TIME OF 1000 EDT ON APRIL 30.
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
PLENTY OF CLOUDS THIS MORNING WILL GRADUALLY DIMINISH LATE THIS
MORNING AND THIS AFTERNOON. NORTHWEST WINDS MAY PRODUCE A FEW WIND
GUSTS TO 16 MPH OR SO, BUT WILL NOT BE AS FREQUENT AS EARLIER THIS
WEEK. LIMITED MIXING HEIGHTS THIS MORNING WILL INCREASE QUITE A
BIT THIS AFTERNOON.
TODAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) THIS MORNING,
THEN PARTLY SUNNY (55-65 PERCENT). AREAS OF
FROST EARLY IN THE MORNING.
TEMPERATURE.........40 AT IGNITION...MAX 47.
RH..................67 PERCENT AT IGNITION...MIN 46 PERCENT.
WIND (20 FT)........WINDS NORTHWEST AT 5 TO 8 MPH AT
IGNITION...OTHERWISE NORTHWEST 6 TO 10 MPH WITH
A FEW GUSTS TO 16 MPH IN THE AFTERNOON.
MIXING HEIGHT.......1500 FT AGL AT IGNITION...OTHERWISE 7000 FT
AGL.
SMOKE DISPERSAL.....300 /GOOD/ AT IGNITION. MAX...1000 /EXCELLENT/.
TIME (EDT) 10 AM NOON 2 PM 4 PM 6 PM 8 PM
SKY (%).........68 60 58 40 40 12
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
TEMP............40 45 46 47 45 45
RH..............67 53 50 47 47 49
20 FT WIND......NW 5 NW 6 NW 7 NW 7 NW 6 NW 5
20 FT WIND GUST.10 14 16 16 14 10
MIX HGT (FT)....1500 4600 6500 7000 5100 1800
SMOKE DISPRSL...300 630 700 1000 690 120
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT) THEN BECOMING
MOSTLY CLOUDY (60-70 PERCENT). AREAS OF FROST
OVERNIGHT. WIDESPREAD FROST OVERNIGHT.
TEMPERATURE.........MIN 31.
RH..................MAX 85 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 5 TO 6 MPH EARLY IN THE EVENING
BECOMING LIGHT.
MIXING HEIGHT.......400 FT AGL.
SMOKE DISPERSAL.....530 (GOOD) EARLY IN THE EVENING DECREASING TO
20 (POOR) LATE IN THE NIGHT.
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT). WIDESPREAD FROST
EARLY IN THE MORNING.
TEMPERATURE.........MAX 49.
RH..................MIN 37 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING NORTH 5 TO 9 MPH EARLY IN
THE MORNING.
MIXING HEIGHT.......7000 FT AGL.
SMOKE DISPERSAL.....120 (POOR) EARLY IN THE MORNING INCREASING TO
1100 (EXCELLENT) IN THE AFTERNOON.
FORECASTER...JERUZAL
REQUESTED BY...DEAN CHAMBERS
TYPE OF REQUEST...PRESCRIBED
.TAG 2612138.0/GRR
.DELDT 04/30/26
.FORMATTERVERSION 2.0.0
.EMAIL DEAN.CHAMBERS@USDA.GOV,RICHARD.W.DAVIS@USDA.GOV
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