365
FNUS73 KGRR 070934
FWSGRR
SPOT FORECAST FOR 439 SOUTH...USFS
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
534 AM EDT WED OCT 7 2026
FORECAST IS BASED ON IGNITION TIME OF 1000 EDT ON OCTOBER 07.
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
WINDS SHIFT TO THE NORTHWEST THIS MORNING AND BECOME MORE WESTERLY
DURING THE AFTERNOON WITH GUSTS AROUND 20 MPH. RELATIVE HUMIDITY
VALUES WILL BOTTOM OUT IN THE MID 40S WITH A HIGH TEMPERATURE IN
THE UPPER 60S. MIXING HEIGHTS WILL BE AROUND 3500 TO 4000 FEET.
ANOTHER FRONT MOVES THROUGH TONIGHT WITH WINDS TURNING BACK TO
THE NORTHWEST, BUT GUSTS WILL LIKELY REMAIN BELOW 20 MPH.
REST OF TODAY
SKY/WEATHER.........SUNNY (5-15 PERCENT).
TEMPERATURE.........61 AT IGNITION...MAX 69.
RH..................84 PERCENT AT IGNITION...MIN 47 PERCENT.
WIND (20 FT)........WINDS NORTHWEST AT 6 MPH AT
IGNITION...OTHERWISE NORTHWEST WINDS 6 TO 9
MPH. GUSTS UP TO 22 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......1000 FT AGL AT IGNITION...OTHERWISE 3800 FT
AGL.
MIXING WINDS........NORTHWEST 9 TO 17 MPH.
SMOKE DISPERSAL.....110 /POOR/ AT IGNITION. MAX...650 /EXCELLENT/.
TIME (EDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM
SKY (%).........17 14 12 12 11 9 7 5 3 2 14 21
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............61 64 67 68 68 68 69 67 67 65 61 61
RH..............84 75 65 61 53 51 47 49 50 56 67 65
20 FT WIND DIR..NW NW NW NW NW W W W W W W W
20 FT WIND SPD..6 6 7 7 9 9 9 8 7 6 5 7
20 FT WIND GUST.14 14 14 16 18 21 22 22 21 17 17 18
MIX HGT (KFT)...1.0 1.7 2.2 3.0 3.6 3.8 3.6 3.2 2.0 0.8 0.6 0.5
MIXING WIND DIR.NW NW NW W NW W W W W W W W
MIXING WIND SPD.10 9 9 13 15 17 17 16 13 10 12 13
SMOKE DISPRSL...110 150 200 380 540 650 620 520 250 80 60 60
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT).
TEMPERATURE.........MIN 51.
RH..................MAX 83 PERCENT.
WIND (20 FT)........WEST WINDS 5 TO 8 MPH WITH GUSTS TO AROUND 21
MPH IN THE EVENING AND OVERNIGHT BECOMING
LIGHT, THEN BECOMING NORTHWEST AROUND 5 MPH
AFTER 3 AM.
MIXING HEIGHT.......400 FT AGL.
MIXING WINDS........WEST 10 TO 14 MPH SHIFTING TO THE NORTHWEST
OVERNIGHT.
SMOKE DISPERSAL.....250 (FAIR) EARLY IN THE EVENING DECREASING TO
50 (POOR) LATE IN THE NIGHT.
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT).
TEMPERATURE.........MAX 63.
RH..................MIN 54 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 5 TO 10 MPH. GUSTS UP TO 23 MPH
IN THE LATE MORNING AND AFTERNOON.
MIXING HEIGHT.......5000 FT AGL.
MIXING WINDS........NORTHWEST 12 TO 18 MPH.
SMOKE DISPERSAL.....50 (POOR) EARLY IN THE MORNING INCREASING TO
920 (EXCELLENT) IN THE AFTERNOON.
FORECASTER...HANSEN
REQUESTED BY...BRANDON KELLEY
TYPE OF REQUEST...PRESCRIBED
.TAG 2623250.0/GRR
.DELDT 10/07/26
.FORMATTERVERSION 2.0.0
.EMAIL BRIAN.STEARNS@USDA.GOV,KORY.BORGMAN@USDA.GOV,BRANDON.KELLEY@USDA.GOV
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