442
FNUS73 KDMX 071315
FWSDMX

Spot Forecast for Calkins Brush Piles...Hardin County Conservation
National Weather Service Des Moines IA
815 AM CDT Wed Oct 7 2026

Forecast is based on ignition time of 0900 CDT on October 07.
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...

Light winds are expected today. RH could fall as low as 30-35%
this afternoon. Many crops are cured, but most other surface fuels
remain green.

.REST OF TODAY...

Sky/weather.........Sunny (10-20 percent).
Temperature.........59 at ignition...Max 76.
RH..................69 percent at ignition...Min 27 percent.
Wind (20 ft)........Winds north at 7 mph at ignition...otherwise
                    Northwest winds 6 to 9 mph shifting to the west
                    around 5 mph late in the afternoon.
Mixing height.......500 ft AGL at ignition...otherwise 4100 ft AGL.
Transport winds.....Northwest 10 to 15 mph.
Smoke dispersal.....Poor /5000 knot-ft/ at ignition. Max...fair
                    /52900 knot-ft/.
GFDI................0.

TIME (CDT)      9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........5   10  7   6   5   4   4   13  21
Weather cov.....
Weather type....
Tstm cov........
Temp............59  63  67  70  72  73  74  75  74
RH..............69  60  52  42  37  33  30  27  28
20 FT wind dir..N   N   N   NW  NW  NW  NW  NW  W
20 FT wind spd..7   8   9   8   7   7   6   6   5
20 FT wind gust.                9   9   9   9   8
Mix hgt (kft)...0.5 0.7 1.3 1.9 2.5 3.0 3.7 4.1 2.1
Transp wind dir.N   N   N   N   NW  NW  NW  NW  NW
Transp wind spd.12  12  12  10  13  14  15  15  13
GFDI............0   0   0   0   0   0   0   0   0
Smoke Dispersal.5   7   13  17  27  36  48  53  23
Smoke Cat.......PR  PR  PR  PR  PR  PR  FR  FR  PR

.TONIGHT...

Sky/weather.........Partly cloudy (30-40 percent).
Temperature.........Min 50.
RH..................Max 64 percent.
Wind (20 ft)........Light winds becoming northwest around 5 mph in
                    the late evening and overnight, then becoming
                    light after 3 am.
Mixing height.......400 ft AGL.
Transport winds.....Northwest 9 to 14 mph.
Smoke dispersal.....Poor (3200 knot-ft).
GFDI................0.

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........20  28  30  34  36  35  37  41  40  37  45  47
Weather cov.....
Weather type....
Tstm cov........
Temp............72  69  64  62  61  60  58  57  56  55  53  52
RH..............33  37  45  50  51  53  57  59  59  59  64  63
20 FT wind dir..W   W   W   W   NW  NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..3   3   3   3   5   5   5   5   5   3   3   3
20 FT wind gust.5   5   5   6   7   7   8   8   8   7   7   6
Mix hgt (kft)...0.7 0.4 0.4 0.5 0.5 0.4 0.4 0.5 0.4 0.4 0.4 0.4
Transp wind dir.NW  NW  NW  NW  NW  NW  N   N   N   N   N   N
Transp wind spd.9   9   9   10  13  13  13  14  13  12  12  9
GFDI............0   0   0   0   0   0   0   0   0   0   0   0
Smoke Dispersal.6   3   4   4   5   5   5   5   5   4   4   3
Smoke Cat.......PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR

.THURSDAY...

Sky/weather.........Mostly sunny (35-45 percent).
Temperature.........Max 70.
RH..................Min 29 percent.
Wind (20 ft)........Light winds.
Mixing height.......3400 ft AGL.
Transport winds.....North 5 to 9 mph shifting to the south around 5
                    mph early in the afternoon, then shifting to
                    the southwest 5 to 7 mph in the afternoon.
Smoke dispersal.....Poor (2200 knot-ft).
GFDI................0.

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........47  42  34  35  36  38  40  45  31  40  36  36
Weather cov.....
Weather type....
Tstm cov........
Temp............51  50  51  55  60  63  65  67  68  68  70  68
RH..............68  68  63  61  51  44  38  34  33  32  29  29
20 FT wind dir..NW  NW  NW  N   NE  NE  NE  NE  S   SW  S   S
20 FT wind spd..2   2   2   2   1   1   1   1   1   1   1   2
20 FT wind gust.5   3   3   3   3   2   3   3   3   3   3   3
Mix hgt (kft)...0.4 0.4 0.4 0.4 0.8 1.7 2.4 2.7 3.2 3.4 3.3 2.8
Transp wind dir.N   N   N   N   N   NE  S   W   W   W   SW  SW
Transp wind spd.9   7   7   6   5   6   5   5   6   7   7   6
GFDI............0   0   0   0   0   0   0   0   0   0   0   0
Smoke Dispersal.3   2   2   2   3   8   10  11  16  20  20  14
Smoke Cat.......PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR

$$
Forecaster...Lee
Requested by...Nicholas Stavroplus
Type of request...PRESCRIBED
.TAG 2623312.0/DMX
.DELDT 10/07/26
.FormatterVersion 2.0.0
.EMAIL nstavroplus@hardincountyia.gov