585
FNUS73 KAPX 111257
FWSAPX

Spot Forecast for Hopkins Creek Unit 1...MIDNR
National Weather Service Gaylord MI
857 AM EDT Mon May 11 2026

Forecast is based on ignition time of 1300 EDT on May 11.
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... Light northerly winds anticipated today with RHs
nearing 30, perhaps dipping into the 20s this afternoon. As such,
mixing heights anticipated to rise above 5kft into the afternoon
with excellent ventilation owing to efficient mixing. Cool today
with highs in the low 50s. As such, efficient burning conditions
anticipated today. Calming winds tonight with rising RHs and
plummeting mixing heights and ventilation. Looking ahead to
Tuesday, anticipating another system to pass through the region,
but with a window of dry weather to start the day. As such, there
could be a window of reduced RHs overlapping with breezy southerly
winds and increasingly efficient mixing and ventilation. Rain
showers are set to move in late in the morning into early
afternoon, which will rise RHs, and in turn, hamper any efficient
mixing or ventilation.

.REST OF TODAY...

Sky/weather.........Sunny (0-10 percent).
Chance of thunder...0 percent.
Max temperature.....Around 52.
Min humidity........30 percent.
20-foot winds.......North winds around 6 mph.
Transport winds.....North 8 to 13 mph.
Mixing height.......5500-5900 ft AGL.
Ventilation index...Good to excellent (384.0-634.0).

TIME (EDT)      1PM 2PM 3PM 4PM 5PM
Sky (%).........7   8   6   4   2
Weather cov.....
Weather type....
Tstm cov........
Chc of thdr (%).0   0   0   0   0
Temp............50  50  51  51  51
RH..............33  33  32  30  30
20 ft wind dir..N   N   N   N   N
20 ft wind spd..7   7   7   7   7
20 ft wind gust.13  13  12  12  12
Mix hgt (kft)...5.8 5.9 5.7 5.7 5.5
Transp wind dir.N   N   N   N   N
Transp wind spd.13  12  9   9   8
Vrate kt-ft.....634 587 457 454 384
Ventrate Cat....EXL GD  GD  GD  GD

.TONIGHT...

Sky/weather.........Mostly clear (10-20 percent). Widespread frost
                    overnight.
Chance of thunder...0 percent.
Min temperature.....Around 30.
Max humidity........78 percent.
20-foot winds.......North winds 5 to 6 mph early in the evening
                    becoming light, then becoming southeast around
                    5 mph early in the morning.
Transport winds.....North 6 to 8 mph shifting to the northeast
                    around 5 mph late in the evening, then shifting
                    to the southeast 6 to 9 mph overnight shifting
                    to the south 10 to 13 mph after 3 am.
Mixing height.......4000-4900 ft AGL decreasing to 300-2200 ft AGL
                    early in the evening.
Ventilation index...Poor to good (14.0-341.0).

TIME (EDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........2   2   1   2   3   4   7   11  14  20  26  32
Weather cov.....                                WID WID WID
Weather type....                                FST FST FST
Tstm cov........
Chc of thdr (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............50  49  47  43  39  35  33  32  31  31  31  32
RH..............32  33  35  41  48  56  61  63  69  72  75  75
20 ft wind dir..N   N   N   NE  NE  NE  SE  SE  SE  SE  SE  SE
20 ft wind spd..7   7   7   5   5   5   3   3   3   6   6   6
20 ft wind gust.9   9   9   8   8   8   8   8   8   14  14  14
Mix hgt (kft)...4.9 4.0 2.2 0.5 0.4 0.4 0.4 0.4 0.3 0.4 0.4 0.4
Transp wind dir.NW  NW  N   N   N   NE  E   SE  SE  S   S   S
Transp wind spd.8   8   8   7   6   5   6   7   9   10  12  13
Vrate kt-ft.....341 281 157 29  19  14  18  21  26  33  38  43
Ventrate Cat....GD  FR  FR  PR  PR  PR  PR  PR  PR  PR  PR  PR

.TUESDAY...

Sky/weather.........Partly sunny (60-70 percent) then becoming
                    cloudy (90-100 percent). Rain showers likely in
                    the morning, then rain showers in the
                    afternoon.
Chance of thunder...14 percent.
Max temperature.....Around 57.
Min humidity........50 percent.
20-foot winds.......South winds 5 to 12 mph. Gusts up to 31 mph in
                    the late morning and afternoon.
Transport winds.....South 13 to 21 mph increasing to 23 to 26 mph
                    in the afternoon.
Mixing height.......400-2200 ft AGL.
Ventilation index...Poor to good (45.0-464.0).

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........45  58  71  78  85  93  94  95  96  96  96  96
Weather cov.....                CHC LKY LKY LKY DEF CHC CHC CHC
Weather type....                RW  RW  RW  RW  RW  RW  RW  RW
Tstm cov........
Chc of thdr (%).0   0   0   0   0   10  10  10  10  10  10  10
Temp............32  34  36  41  45  49  50  49  48  49  51  52
RH..............78  72  69  59  53  50  52  61  68  71  68  69
20 ft wind dir..SE  SE  SE  S   S   S   S   S   S   S   S   S
20 ft wind spd..7   7   7   10  10  10  14  14  14  14  14  14
20 ft wind gust.18  18  18  24  24  24  29  29  29  31  31  31
Mix hgt (kft)...0.4 0.4 0.6 1.4 1.8 1.9 1.8 1.7 1.7 1.4 2.2 2.0
Transp wind dir.S   S   S   S   S   S   S   S   S   S   S   S
Transp wind spd.13  14  14  16  20  21  21  23  24  23  24  26
Vrate kt-ft.....45  54  67  197 313 351 320 340 361 289 453 464
Ventrate Cat....PR  PR  PR  FR  GD  GD  GD  GD  GD  FR  GD  GD

$$
Forecaster...HAD
Requested by...650
Type of request...PRESCRIBED
.TAG 2613319.0/APX
.DELDT 05/11/26
.FormatterVersion 2.0.0
.EMAIL bakerb7@michigan.gov