490
FNUS73 KAPX 070942
FWSAPX
SPOT FORECAST FOR MACK MCKINLEY 6...USFS
NATIONAL WEATHER SERVICE GAYLORD MI
542 AM EDT WED OCT 7 2026
FORECAST IS BASED ON IGNITION TIME OF 1100 EDT ON OCTOBER 07.
IF CONDITIONS BECOME UNREPRESENTATIVE... CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE AT (989)732-9306, IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
GENERALLY NORTHWEST WINDS THROUGH THE DAY TODAY, 20 FT WINDS AND
GUSTS AROUND 10 TO 18 MPH, BUT EXPECT LULLS AT TIMES. VERY LOW
CHANCE FOR A RAIN SHOWER THIS EVENING AND EARLY OVERNIGHT, ALONG
WITH A BRIEF UPTICK IN WINDS, BUT CURRENTLY EXPECTING THE BEST
CHANCE NORTH OF THE SITE. NEVERTHELESS, EXPECT RELATIVELY DEEP
AFTERNOON MIXING TODAY, 4.0 TO 5.5 KFT, RESULTING IN MIN
HUMIDITIES IN THE 40S THROUGH MUCH OF THE AFTERNOON, WITH THE
POTENTIAL TO DROP INTO THE UPPER 30S. SOME OF THE MORE AGGRESSIVE
PIECES OF GUIDANCE SUGGEST MIN RHS DROPPING INTO THE MID 30S, BUT
CURRENTLY WE DO NOT HAVE THAT IN THE FORECAST. BREEZY AND
RELATIVELY DRY CONDITIONS WILL CONTINUE ON THURSDAY.
REST OF TODAY
SKY/WEATHER.........SUNNY (0-10 PERCENT).
CHANCE OF THUNDER...1 PERCENT.
MAX TEMPERATURE.....AROUND 69.
MIN HUMIDITY........38 PERCENT.
20-FOOT WINDS.......NORTHWEST WINDS 6 TO 12 MPH.
TRANSPORT WINDS.....WEST 14 TO 21 MPH.
MIXING HEIGHT.......2100-3400 FT AGL INCREASING TO 4400-5400 FT AGL
IN THE AFTERNOON.
VENTILATION INDEX...FAIR TO EXCELLENT (258.0-702.0) INCREASING TO
EXCELLENT (832.0) LATE IN THE AFTERNOON.
TIME (EDT) 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........7 10 2 2 3 1 9
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF THDR (%).0 0 0 0 0 0 0
TEMP............62 64 66 67 67 68 66
RH..............58 54 45 42 42 40 38
20 FT WIND DIR..NW NW NW NW W W W
20 FT WIND SPD..7 10 10 10 12 12 12
20 FT WIND GUST.15 16 16 17 17 16 15
MIX HGT (KFT)...2.1 3.4 4.4 4.9 5.4 5.2 5.0
TRANSP WIND DIR.W W W W W W W
TRANSP WIND SPD.14 16 18 20 21 21 21
VRATE KT-FT.....261 473 702 832 974 959 909
VENTRATE CAT....FR GD EXL EXL EXL EXL EXL
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT) THEN BECOMING
MOSTLY CLOUDY (50-60 PERCENT) THEN BECOMING
MOSTLY CLEAR (10-20 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS EARLY IN THE EVENING.
CHANCE OF THUNDER...5 PERCENT.
MIN TEMPERATURE.....AROUND 39.
MAX HUMIDITY........100 PERCENT.
20-FOOT WINDS.......WEST WINDS 5 TO 10 MPH WITH GUSTS TO AROUND 20
MPH EARLY IN THE EVENING BECOMING BECOMING WEST
AROUND 5 MPH OVERNIGHT.
TRANSPORT WINDS.....WEST 9 TO 18 MPH.
MIXING HEIGHT.......4200 FT AGL DECREASING TO 400-1300 FT AGL.
VENTILATION INDEX...EXCELLENT (666.0) DECREASING TO POOR TO FAIR
(41.0-140.0).
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........2 10 6 28 41 53 13 9 7 17 12 18
WEATHER COV..... SCH SCH SCH
WEATHER TYPE.... RW RW RW
TSTM COV........
CHC OF THDR (%).0 0 10 10 10 10 10 10 0 0 0 0
TEMP............64 61 54 52 50 48 47 47 46 45 45 43
RH..............40 45 50 58 70 80 91 93 93 93 91 96
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..9 9 9 5 5 5 6 6 6 6 6 6
20 FT WIND GUST.20 20 20 13 13 13 14 14 14 14 14 14
MIX HGT (KFT)...4.2 1.3 0.7 0.5 0.5 0.5 0.5 0.5 0.5 0.4 0.5 0.5
TRANSP WIND DIR.W W W W NW W NW NW NW W NW NW
TRANSP WIND SPD.18 13 10 9 10 10 12 12 12 13 12 12
VRATE KT-FT.....666 140 67 43 46 42 49 48 46 49 45 46
VENTRATE CAT....EXL FR PR PR PR PR PR PR PR PR PR PR
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT).
CHANCE OF THUNDER...1 PERCENT.
MAX TEMPERATURE.....AROUND 61.
MIN HUMIDITY........49 PERCENT.
20-FOOT WINDS.......WEST WINDS 5 TO 9 MPH. GUSTS UP TO 23 MPH IN
THE LATE MORNING AND AFTERNOON.
TRANSPORT WINDS.....NORTHWEST 12 TO 21 MPH INCREASING TO 21 TO 23
MPH IN THE AFTERNOON.
MIXING HEIGHT.......400-1700 FT AGL INCREASING TO 5000-5900 FT AGL.
VENTILATION INDEX...POOR TO GOOD (45.0-517.0) INCREASING TO
EXCELLENT (746.0) LATE IN THE MORNING.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........7 13 9 22 14 33 37 46 45 48 28 31
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............43 42 40 44 51 56 58 59 60 60 61 59
RH..............97 98 100 100 88 76 66 60 55 53 49 53
20 FT WIND DIR..W W W W W W W W W W W W
20 FT WIND SPD..6 6 6 10 10 10 12 12 12 12 12 12
20 FT WIND GUST.14 14 14 20 20 20 22 22 22 23 23 23
MIX HGT (KFT)...0.4 0.5 0.6 1.7 3.0 4.1 4.6 5.0 5.4 5.9 5.7 5.2
TRANSP WIND DIR.NW NW W W NW NW NW W W W W NW
TRANSP WIND SPD.12 12 12 16 20 21 22 22 22 21 22 23
VRATE KT-FT.....45 48 57 240 517 751 876 968 1043106510851033
VENTRATE CAT....PR PR PR FR GD EXL EXL EXL EXL EXL EXL EXL
FORECASTER...JLD
REQUESTED BY...TRAVIS WILTSE
TYPE OF REQUEST...PRESCRIBED
.TAG 2623295.0/APX
.DELDT 10/07/26
.FORMATTERVERSION 2.0.0
.EMAIL TRAVIS.A.WILTSE@USDA.GOV
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