088
FNUS73 KGRR 171515
FWSGRR
SPOT FORECAST FOR BU 30...MDMVA
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
ISSUED BY NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
1115 AM EDT WED SEP 17 2025
FORECAST IS BASED ON IGNITION TIME OF 1200 EDT ON SEPTEMBER 17.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT THE NWS DETROIT OFFICE AT (248) 625-4249 IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST. NWS DETROIT IS PROVIDING SERVICE BACKUP FOR
THE GRAND RAPDIS OFFICE.
DISCUSSION
REST OF TODAY
SKY/WEATHER.........SUNNY (10-20 PERCENT).
TEMPERATURE.........77 AT IGNITION...MAX 84.
RH..................50 PERCENT AT IGNITION...MIN 38 PERCENT.
WIND (20 FT)........WINDS NORTHEAST AT 2 MPH AT
IGNITION...OTHERWISE LIGHT WINDS BECOMING NORTH
AROUND 5 MPH THROUGH MID AFTERNOON, THEN
BECOMING LIGHT LATE IN THE DAY.
MIXING HEIGHT.......3900 FT AGL AT IGNITION...OTHERWISE 5400 FT
AGL.
MIXING WINDS........NORTH 3 TO 5 MPH.
SMOKE DISPERSAL.....130 /FAIR/ AT IGNITION. MAX...250 /FAIR/.
TIME (EDT) 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM 10P 11P
SKY (%).........18 12 10 12 12 12 10 7 11 5 2 4
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............77 79 81 82 83 83 81 79 76 72 68 65
RH..............50 45 42 40 38 38 41 44 48 55 65 75
20 FT WIND DIR..NE N N N N N NE NE NE NE N N
20 FT WIND SPD..2 3 3 5 5 3 3 3 2 2 2 2
20 FT WIND GUST.6 7 8 8 8 7 7 6 5 5 3 3
MIX HGT (KFT)...3.9 4.6 5.1 5.2 5.4 5.2 4.3 0.9 0.4 0.5 0.5 0.5
MIXING WIND DIR.N N N N N N N N N N N N
MIXING WIND SPD.3 5 5 5 5 5 5 5 5 6 7 6
SMOKE DISPRSL...130 210 230 240 250 240 200 40 20 30 30 30
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (0-10 PERCENT).
TEMPERATURE.........MIN 56.
RH..................MAX 93 PERCENT.
WIND (20 FT)........LIGHT WINDS.
MIXING HEIGHT.......400 FT AGL.
MIXING WINDS........NORTH 3 TO 7 MPH.
SMOKE DISPERSAL.....20 (POOR).
THURSDAY
SKY/WEATHER.........SUNNY (10-20 PERCENT).
TEMPERATURE.........MAX 86.
RH..................MIN 41 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING NORTHWEST 5 TO 7 MPH.
MIXING HEIGHT.......6300 FT AGL.
MIXING WINDS........NORTHWEST 3 TO 9 MPH.
SMOKE DISPERSAL.....10 (POOR) EARLY IN THE MORNING INCREASING TO
540 (GOOD) IN THE AFTERNOON.
FORECASTER...CONSIDINE
REQUESTED BY...MICHELE RICHARDS
TYPE OF REQUEST...PRESCRIBED
.TAG 2522100.0/GRR
.DELDT 09/17/25
.FORMATTERVERSION 2.0.0
.EMAIL RICHARDSM2@MICHIGAN.GOV
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