173
FNUS73 KDMX 061250
FWSDMX

Spot Forecast for Hawthorn South...Iowa Department of Natural Resources
National Weather Service Des Moines IA
750 AM CDT Wed May 6 2026

Forecast is based on ignition time of 0700 CDT on May 06.
If conditions become unrepresentative...contact the National Weather
Service.

An initial observation at ignition and a mid burn observation are required.

Please relay them to the National Weather Service for each prescribed burn.

.DISCUSSION...

Winds from the north under 10 mph at present will increase and
become from the northwest at 10 to 20 mph by mid to late morning
under a mixture of sunshine and clouds. A morning elevated
inversion will limit mixing the next few hours, but after 9am or
so the mixing height will increase and smoke dispersion will
become good to very good. Relative humidity will fall to around
30% by this afternoon into early this evening and recover to
around 70% by Thursday morning.


.REST OF TODAY...

Sky/weather.........Partly sunny (45-55 percent).
Max temperature.....Around 57.
Min humidity........29 percent.
Wind (20 ft)........North winds 5 to 10 mph shifting to the
                    northwest around 12 mph in the afternoon.
Mixing height.......8000 ft AGL.
Transport winds.....Northwest 10 to 17 mph increasing to 16 to 18
                    mph late in the afternoon.
Smoke dispersal.....Poor (3600 knot-ft) early in the morning
                    increasing to very good (105200 knot-ft) in
                    the afternoon.
GFDI................0.

TIME (CDT)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........66  68  58  64  52  44  51  67  55  58  36
Weather cov.....
Weather type....
Tstm cov........
Temp............39  43  46  50  52  53  54  55  55  55  57
RH..............64  53  45  37  36  33  30  31  30  31  29
20 FT wind dir..N   N   N   N   NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..5   6   7   7   9   10  12  12  12  12  12
20 FT wind gust.12  12  13  15  16  18  18  20  18  20  17
Mix hgt (kft)...0.4 1.1 3.0 5.6 6.6 7.5 7.9 7.6 7.7 8.0 7.5
Transp wind dir.N   N   N   NW  NW  NW  NW  NW  NW  NW  NW
Transp wind spd.10  12  13  15  16  16  17  18  16  17  17
GFDI............0   0   0   0   0   0   0   0   0   0   0
Smoke Dispersal.4   11  33  73  93  105 119 121 108 120 112
Smoke Cat.......PR  PR  PR  GD  GD  VGD VGD VGD VGD VGD VGD

.TONIGHT...

Sky/weather.........Partly cloudy (30-40 percent). Areas of frost
                    early in the morning.
Min temperature.....Around 36.
Max humidity........72 percent.
Wind (20 ft)........Northwest winds 5 to 10 mph early in the
                    evening becoming light, then becoming southwest
                    around 5 mph after 3 am.
Mixing height.......300 ft AGL.
Transport winds.....Northwest 7 to 16 mph shifting to the south 7
                    to 10 mph overnight.
Smoke dispersal.....Very good (104400 knot-ft) early in the evening
                    decreasing to poor (1900 knot-ft) by late in the
                    evening.
GFDI................0.

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........44  36  36  36  36  33  34  29  28  28  31  32
Weather cov.....                                            ARS
Weather type....                                            FST
Tstm cov........
Temp............56  55  52  47  45  44  43  42  41  39  38  37
RH..............31  31  36  45  53  55  57  60  62  67  70  72
20 FT wind dir..NW  NW  NW  NW  NW  W   SW  SW  SW  S   SW  S
20 FT wind spd..10  9   5   3   2   3   3   3   3   3   5   5
20 FT wind gust.16  15  10  8   6   6   6   6   6   7   7   9
Mix hgt (kft)...7.5 4.8 0.5 0.5 0.4 0.4 0.4 0.3 0.4 0.4 0.3 0.3
Transp wind dir.NW  NW  NW  N   N   NE  S   S   S   S   SW  SW
Transp wind spd.16  15  8   8   7   6   7   7   8   9   9   10
GFDI............0   0   0   0   0   0   0   0   0   0   0   0
Smoke Dispersal.104 62  4   3   3   2   2   2   3   3   3   3
Smoke Cat.......VGD GD  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR

.THURSDAY...

Sky/weather.........Partly sunny (50-60 percent).
Max temperature.....Around 65.
Min humidity........38 percent.
Wind (20 ft)........Southwest winds 5 to 10 mph shifting to the
                    west 12 to 13 mph in the afternoon.
Mixing height.......6500 ft AGL.
Transport winds.....Southwest 10 to 17 mph shifting to the west 20
                    to 23 mph in the late morning and afternoon.
Smoke dispersal.....Poor (3000 knot-ft) early in the morning
                    increasing to very good (124300 knot-ft) in
                    the afternoon.
GFDI................0.

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........38  39  46  57  62  59  63  68  64  48  72  49
Weather cov.....
Weather type....
Tstm cov........
Temp............37  38  42  46  54  56  58  59  61  64  64  64
RH..............72  73  67  60  48  47  45  45  46  41  40  38
20 FT wind dir..SW  SW  SW  SW  SW  SW  W   W   W   W   SW  SW
20 FT wind spd..5   5   6   7   8   10  10  12  12  12  13  12
20 FT wind gust.10  12  12  15  15  17  18  21  20  21  22  21
Mix hgt (kft)...0.3 0.3 1.0 1.8 2.8 4.9 6.2 6.5 5.7 5.3 4.8 4.8
Transp wind dir.SW  SW  SW  SW  W   W   W   W   W   W   SW  W
Transp wind spd.10  12  13  17  20  23  23  22  20  20  20  20
GFDI............0   0   0   0   0   0   0   0   0   0   0   0
Smoke Dispersal.3   3   11  28  48  98  124 124 97  91  81  82
Smoke Cat.......PR  PR  PR  PR  FR  GD  VGD VGD GD  GD  GD  GD

$$
Forecaster...Ansorge
Requested by...Matt Shanklin
Type of request...PRESCRIBED
.TAG 2612894.0/DMX
.DELDT 05/06/26
.FormatterVersion 2.0.0
.EMAIL matt.shanklin@dnr.iowa.gov