822
FNUS73 KAPX 200932
FWSAPX

Spot Forecast for Blue Lakes...MIDNR
National Weather Service Gaylord MI
532 AM EDT Thu Aug 20 2026

Forecast is based on ignition time of 1300 EDT on August 20.
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...After a cool start, temperatures at the burn site will
climb into the upper 70s this afternoon. Humidity levels bottom out
in the mid to upper 30s percent. Sustained winds will be very light,
5 mph or less, mainly off of Lake Huron to north and northeast. A few
gusts around 10 mph are possible. Mixing heights climb to between
7000 and 8000 feet. Humidities only recover into the lower 70s
percent tonight. A slight chance for rain develops toward Friday
morning.

.REST OF TODAY...

Sky/weather.........Mostly sunny (30-40 percent).
Chance of thunder...0 percent.
Max temperature.....Around 79.
Min humidity........37 percent.
20-foot winds.......Light winds.
Transport winds.....West 6 to 7 mph.
Mixing height.......7100-7700 ft AGL.
Ventilation index...Good (366.0).

TIME (EDT)      1PM 2PM 3PM 4PM 5PM
Sky (%).........28  42  39  36  31
Weather cov.....
Weather type....
Tstm cov........
Chc of thdr (%).0   0   0   0   0
Temp............76  77  77  77  77
RH..............40  37  37  37  37
20 ft wind dir..N   N   NE  NE  NE
20 ft wind spd..2   2   3   3   3
20 ft wind gust.9   9   10  10  10
Mix hgt (kft)...7.1 7.7 7.7 7.7 7.3
Transp wind dir.NW  W   W   W   W
Transp wind spd.7   7   7   7   6
Vrate kt-ft.....428 461 461 462 366
Ventrate Cat....GD  GD  GD  GD  GD

.TONIGHT...

Sky/weather.........Partly cloudy (35-45 percent) then becoming
                    mostly cloudy (50-60 percent). Slight chance of
                    showers early in the morning.
Chance of thunder...3 percent.
Min temperature.....Around 58.
Max humidity........78 percent.
20-foot winds.......Light winds becoming south around 5 mph early
                    in the morning.
Transport winds.....West around 7 mph shifting to the southeast 7
                    to 13 mph.
Mixing height.......6700 ft AGL decreasing to 400-600 ft AGL.
Ventilation index...Poor to good (31.0-404.0).

TIME (EDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........26  29  31  41  50  51  52  54  55  57  59  61
Weather cov.....                                            SCH
Weather type....                                            RW
Tstm cov........
Chc of thdr (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............76  73  70  66  63  61  61  61  61  61  60  60
RH..............39  44  53  63  70  72  70  70  72  72  72  69
20 ft wind dir..E   E   E   SE  SE  SE  S   S   S   S   S   S
20 ft wind spd..3   3   3   5   5   5   5   5   5   6   6   6
20 ft wind gust.10  10  10  13  13  13  14  14  14  14  14  14
Mix hgt (kft)...6.7 4.0 0.6 0.4 0.4 0.4 0.4 0.5 0.5 0.5 0.5 0.5
Transp wind dir.W   SE  E   E   SE  S   S   S   S   S   S   S
Transp wind spd.7   7   7   8   9   9   9   9   10  12  12  13
Vrate kt-ft.....404 240 34  31  34  34  35  36  43  48  50  56
Ventrate Cat....GD  FR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR

.FRIDAY...

Sky/weather.........Partly sunny (55-65 percent). Chance of showers
                    late in the afternoon.
Chance of thunder...21 percent.
Max temperature.....Around 81.
Min humidity........48 percent.
20-foot winds.......South winds 5 to 7 mph. Gusts up to 22 mph in
                    the afternoon. Gusty and erratic winds expected
                    near thunderstorms late in the afternoon.
Transport winds.....South 12 to 15 mph.
Mixing height.......500-2100 ft AGL increasing to 3100-4700 ft AGL
                    in the afternoon.
Ventilation index...Poor to good (46.0-513.0).

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........62  57  51  43  51  47  72  78  79  77  62  59
Weather cov.....SCH SCH SCH SCH SCH SCH SCH SCH CHC CHC CHC CHC
Weather type....RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW
Tstm cov........                                            SCH
Chc of thdr (%).0   0   0   0   0   10  10  10  10  10  10  20
Temp............60  60  60  63  69  72  74  75  78  78  79  79
RH..............69  72  78  78  66  59  55  54  48  50  49  49
20 ft wind dir..S   S   S   S   S   S   S   S   S   S   S   S
20 ft wind spd..6   6   6   8   8   8   9   9   9   9   9   9
20 ft wind gust.16  16  16  18  18  18  22  22  22  21  21  21
Mix hgt (kft)...0.5 0.5 0.6 0.9 1.3 2.1 3.1 3.8 3.9 4.0 4.7 4.1
Transp wind dir.S   S   S   S   S   S   S   S   S   S   S   SW
Transp wind spd.12  12  12  12  13  15  15  15  14  14  13  14
Vrate kt-ft.....47  46  57  92  144 270 397 496 465 482 513 492
Ventrate Cat....PR  PR  PR  PR  FR  FR  GD  GD  GD  GD  GD  GD

$$
Forecaster...JZ
Requested by...Nate Stearns
Type of request...PRESCRIBED
.TAG 2620052.0/APX
.DELDT 08/20/26
.FormatterVersion 2.0.0
.EMAIL stearnsn@michigan.gov