708
FNUS73 KDMX 141253
FWSDMX

Spot Forecast for Ventura Dredge South...IA DNR
National Weather Service Des Moines IA
753 AM CDT Wed May 14 2025

Forecast is based on ignition time of 0800 CDT on May 14.
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...

Another warm day with minimum relative humidity values falling into
the 20s and 30s this afternoon. Thunderstorms are possible later
tonight and Thursday morning for parts of central and northern
Iowa.

.REST OF TODAY...

Sky/weather.........Sunny (15-25 percent).
Temperature.........66 at ignition...Max 84.
RH..................75 percent at ignition...Min 36 percent.
Wind (20 ft)........Winds southeast at 7 mph at
                    ignition...otherwise Southeast winds 7 to 15
                    mph.
Mixing height.......600 ft AGL at ignition...otherwise 7100 ft AGL.
Transport winds.....Southeast 10 to 18 mph.
Smoke dispersal.....Poor /5200 knot-ft/ at ignition.
                    Max...excellent /86400 knot-ft/ increasing to
                    excellent (106700 knot-ft) in the afternoon.
GFDI................0.

TIME (CDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........15  9   8   15  20  27  29  36  32  28
Weather cov.....
Weather type....
Tstm cov........
Temp............66  70  73  77  80  82  83  84  84  84
RH..............75  68  58  49  42  40  38  37  37  36
20 FT wind dir..SE  SE  SE  SE  SE  SE  SE  SE  SE  SE
20 FT wind spd..7   8   9   12  13  14  15  15  15  15
20 FT wind gust.        10  14  18  20  21  21  21  21
Mix hgt (kft)...0.6 1.7 3.6 4.9 6.2 6.9 7.1 7.0 6.7 7.1
Transp wind dir.S   S   S   SE  SE  S   S   SE  S   S
Transp wind spd.10  12  14  15  16  18  18  18  18  18
GFDI............0   0   0   0   0   0   0   0   0   0
Smoke Dispersal.5   17  43  64  86  111 114 112 107 113
Smoke Cat.......PR  PR  FR  GD  GD  VGD VGD VGD VGD VGD

.TONIGHT...

Sky/weather.........Partly cloudy (35-45 percent) then becoming
                    mostly cloudy (55-65 percent). Slight chance of
                    showers and thunderstorms overnight. Chance of
                    showers and thunderstorms after 3 am.
Temperature.........Min 62.
RH..................Max 93 percent.
Wind (20 ft)........Southeast winds 12 to 16 mph. Gusty and erratic
                    winds expected near thunderstorms overnight.
Mixing height.......500 ft AGL.
Transport winds.....Southeast 16 to 21 mph.
Smoke dispersal.....Excellent (105400 knot-ft) early in the evening
                    decreasing to poor (6600 knot-ft) late in the
                    night.
GFDI................0.

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........29  33  33  29  42  38  37  48  52  64  59  66
Weather cov.....                                SCH SCH CHC CHC
Weather type....                                RW  RW  RW  RW
Tstm cov........                                SCH SCH CHC CHC
Temp............84  82  78  74  70  69  67  67  65  65  64  62
RH..............36  38  45  51  59  63  70  68  75  78  87  93
20 FT wind dir..SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE
20 FT wind spd..14  13  13  12  12  12  12  13  14  14  15  16
20 FT wind gust.20  20  20  18  20  21  21  22  23  23  24  24
Mix hgt (kft)...6.6 5.3 0.8 0.5 0.5 0.5 0.5 0.5 0.6 0.6 0.7 0.7
Transp wind dir.S   SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE
Transp wind spd.18  18  17  16  16  16  17  18  20  20  18  21
GFDI............0   0   0   0   0   0   0   0   0   0   0   0
Smoke Dispersal.105 84  11  7   7   7   8   8   9   10  11  13
Smoke Cat.......VGD GD  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR

.THURSDAY...

Sky/weather.........Mostly sunny (35-45 percent). Chance of showers
                    and thunderstorms in the morning and early
                    afternoon.
Temperature.........Max 81.
RH..................Min 36 percent.
Wind (20 ft)........Windy. Southeast winds 17 to 24 mph with gusts
                    to around 35 mph shifting to the southwest 25
                    to 30 mph in the afternoon. Gusty and erratic
                    winds expected near thunderstorms in the
                    morning and early afternoon.
Mixing height.......6400 ft AGL.
Transport winds.....Southeast 21 to 28 mph shifting to the south 30
                    to 31 mph late in the morning, then shifting to
                    the southwest 32 to 35 mph in the afternoon.
Smoke dispersal.....Fair (13700 knot-ft) early in the morning
                    increasing to excellent (98500 knot-ft) in the
                    afternoon increasing to excellent (136700
                    knot-ft) in the afternoon.
GFDI................1.

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........64  69  65  62  61  47  31  20  13  12  15  19
Weather cov.....CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC
Weather type....RW  RW  RW  RW  RW  RW  RW  RW  RW  RW
Tstm cov........CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC
Temp............63  63  66  69  72  76  80  81  81  80  79  77
RH..............93  97  90  81  76  64  51  44  39  38  36  37
20 FT wind dir..SE  SE  SE  SE  SE  S   S   SW  SW  SW  SW  SW
20 FT wind spd..17  20  21  23  24  24  25  26  28  29  30  29
20 FT wind gust.24  29  30  32  35  35  36  37  38  40  40  40
Mix hgt (kft)...0.8 1.1 1.2 1.3 1.7 2.5 3.7 4.9 5.4 5.9 6.4 6.1
Transp wind dir.SE  SE  SE  SE  SE  S   S   SW  SW  SW  SW  SW
Transp wind spd.21  24  25  28  31  30  31  32  33  35  35  33
GFDI............0   0   0   0   0   1   1   1   1   1   1   1
Smoke Dispersal.14  24  27  32  47  66  99  137 156 175 191 179
Smoke Cat.......PR  PR  PR  PR  FR  GD  GD  VGD EXL EXL EXL EXL

$$
Forecaster...Lee
Requested by...Nick Brushaber
Type of request...PRESCRIBED
.TAG 2513974.0/DMX
.DELDT 05/14/25
.FormatterVersion 2.0.0
.EMAIL nick.brushaber@dnr.iowa.gov