904
FNUS73 KAPX 090719
FWSAPX

Spot Forecast for Rainbow 12...USFS
National Weather Service Gaylord MI
319 AM EDT Fri May 9 2025

Forecast is based on ignition time of 0700 EDT on May 09.
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...Calm winds early this morning at the burn site gradually
become out of the northwest through midday. Winds back more westerly
through the afternoon, but largely remain sustained under 10 mph with
just an occasional higher gust. Limited early morning moisture mixes
out through the day, with relative humidity values likely bottoming out
near 20 percent, or bit lower by mid-late afternoon. Decent RH
recovery tonight, but not outstanding, despite an uptick in mid-cloud
cover after midnight with a very low chance for a sprinkle or rogue
shower toward early Saturday morning.

.REST OF TODAY...

Sky/weather.........Sunny (0-10 percent). Widespread frost early in
                    the morning.
Chance of thunder...0 percent.
Max temperature.....Around 64.
Min humidity........19 percent.
20-foot winds.......Light winds becoming northwest 5 to 6 mph in
                    the afternoon.
Transport winds.....Northeast 3 to 5 mph shifting to the northwest
                    3 to 7 mph in the late morning and early
                    afternoon, then increasing to around 8 mph late
                    in the afternoon.
Mixing height.......400-2300 ft AGL increasing to 3100-4100 ft AGL
                    late in the morning.
Ventilation index...Poor to good (15.0-330.0).

TIME (EDT)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........2   4   10  2   1   1   0   0   0   0   0
Weather cov.....WID
Weather type....FST
Tstm cov........
Chc of thdr (%).0   0   0   0   0   0   0   0   0   0   0
Temp............32  36  45  50  53  56  59  61  63  63  64
RH..............69  64  47  36  31  27  26  24  21  21  19
20 ft wind dir..NE  NE  NW  NW  NW  NW  NW  NW  W   W   W
20 ft wind spd..1   1   3   3   3   6   6   6   7   7   7
20 ft wind gust.2   2   6   6   6   9   9   9   12  12  12
Mix hgt (kft)...0.4 0.4 0.8 2.3 3.1 3.6 4.0 4.1 4.1 3.8 3.2
Transp wind dir.E   NE  N   NW  NW  NW  NW  NW  NW  W   W
Transp wind spd.5   3   3   3   6   7   7   7   8   8   8
Vrate kt-ft.....19  15  27  80  181 252 277 286 330 306 258
Ventrate Cat....PR  PR  PR  PR  FR  FR  FR  FR  GD  GD  FR

.TONIGHT...

Sky/weather.........Becoming partly cloudy (35-45 percent).
Chance of thunder...6 percent.
Min temperature.....Around 44.
Max humidity........57 percent.
20-foot winds.......West winds 5 to 6 mph early in the evening
                    becoming light, then becoming south around 5
                    mph overnight.
Transport winds.....West 7 to 8 mph shifting to the southwest 7 to
                    13 mph in the late evening and overnight.
Mixing height.......2000-2700 ft AGL decreasing to 400-700 ft AGL
                    early in the evening.
Ventilation index...Poor to fair (33.0-220.0).

TIME (EDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........0   0   0   0   1   1   17  39  44  38  28  19
Weather cov.....
Weather type....
Tstm cov........
Chc of thdr (%).0   0   0   0   0   0   0   0   0   0   0   10
Temp............63  62  59  53  50  48  48  47  46  46  46  45
RH..............19  20  23  33  39  42  42  43  45  47  47  51
20 ft wind dir..W   W   W   SW  SW  SW  S   S   S   SW  SW  SW
20 ft wind spd..7   7   7   5   5   5   6   6   6   6   6   6
20 ft wind gust.10  10  10  8   8   8   12  12  12  10  10  10
Mix hgt (kft)...2.7 2.0 0.7 0.5 0.4 0.4 0.5 0.5 0.5 0.5 0.5 0.5
Transp wind dir.W   W   W   SW  SW  SW  SW  SW  SW  S   SW  SW
Transp wind spd.8   8   7   7   8   9   9   12  13  13  13  12
Vrate kt-ft.....220 161 49  33  36  41  43  57  66  66  63  60
Ventrate Cat....FR  FR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR

.SATURDAY...

Sky/weather.........Sunny (10-20 percent).
Chance of thunder...6 percent.
Max temperature.....Around 67.
Min humidity........30 percent.
20-foot winds.......Southwest winds around 5 mph early in the
                    morning becoming light, then becoming north 7
                    to 12 mph late in the morning.
Transport winds.....West 7 to 9 mph shifting to the north 9 to 18
                    mph early in the morning.
Mixing height.......500-2200 ft AGL increasing to 2700-3200 ft AGL
                    in the afternoon.
Ventilation index...Poor to good (33.0-519.0).

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........17  19  21  15  9   13  17  16  14  10  6   5
Weather cov.....
Weather type....
Tstm cov........
Chc of thdr (%).10  10  10  10  10  0   0   0   0   0   0   0
Temp............46  47  48  52  57  61  62  63  64  65  65  64
RH..............55  56  57  53  48  45  43  39  36  34  32  30
20 ft wind dir..SW  SW  SW  N   N   N   N   N   N   N   N   N
20 ft wind spd..6   6   6   8   8   8   12  12  12  14  14  14
20 ft wind gust.8   8   8   16  16  16  22  22  22  22  22  22
Mix hgt (kft)...0.5 0.5 0.6 1.1 1.3 1.9 2.2 2.7 3.1 3.2 3.2 2.9
Transp wind dir.SW  W   NW  N   N   N   N   N   N   N   N   N
Transp wind spd.9   7   9   12  13  16  16  17  18  18  18  17
Vrate kt-ft.....43  33  46  108 147 272 312 401 496 519 493 441
Ventrate Cat....PR  PR  PR  PR  FR  FR  GD  GD  GD  GD  GD  GD

$$
Forecaster...MJG
Requested by...Joe Raspotnik
Type of request...PRESCRIBED
.TAG 2513557.0/APX
.DELDT 05/09/25
.FormatterVersion 2.0.0
.EMAIL joseph.raspotnik@usda.gov