491
FNUS73 KDMX 011407
FWSDMX

Spot Forecast for Sweet Marsh Refuge...Iowa DNR
National Weather Service Des Moines IA
907 AM CDT Wed Apr 1 2026

Forecast is based on ignition time of 0900 CDT on April 01.
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...

Mostly dry conditions are expected for the rest of the morning,
followed by returning chances for showers this afternoon. Minimum
RH values in the mid 40s are expected, along with easterly winds
gusting to 15-20 mph. Highs are expected to reach into the low 50s
this afternoon.

.REST OF TODAY...

Sky/weather.........Partly sunny (60-70 percent) then becoming
                    cloudy (85-95 percent). Slight chance of rain
                    showers late in the afternoon.
Max temperature.....Around 51.
Min humidity........44 percent.
Wind (20 ft)........East winds 16 to 20 mph.
Mixing height.......3400 ft AGL.
Transport winds.....East 20 to 24 mph.
Smoke dispersal.....Poor (34000 knot-ft) early in the morning
                    increasing to good (67200 knot-ft) in the
                    afternoon.
GFDI................8.

TIME (CDT)      9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........53  56  66  72  77  74  77  79  90
Weather cov.....                            SCH SCH
Weather type....                            RW  RW
Tstm cov........
Temp............40  42  44  46  49  49  50  50  49
RH..............59  55  51  49  44  44  44  44  46
20 FT wind dir..E   E   E   E   E   E   E   E   E
20 FT wind spd..16  17  17  17  17  17  18  20  20
20 FT wind gust.23  25  25  25  25  25  26  26  26
Mix hgt (kft)...1.9 1.9 2.3 2.5 3.1 3.2 3.3 3.4 3.2
Transp wind dir.E   E   E   E   E   E   E   E   E
Transp wind spd.23  21  20  21  20  21  22  23  24
GFDI............5   7   8   9   9   10  11  11  11
Smoke Dispersal.37  34  39  45  52  58  62  67  67
Smoke Cat.......PR  PR  PR  FR  FR  FR  GD  GD  GD

.TONIGHT...

Sky/weather.........Cloudy (90-100 percent). Chance of rain showers
                    this evening and overnight.
Min temperature.....Around 36.
Max humidity........96 percent.
Wind (20 ft)........East winds 20 to 22 mph.
Mixing height.......900 ft AGL.
Transport winds.....East 24 to 30 mph.
Smoke dispersal.....Good (69500 knot-ft) early in the evening
                    decreasing to poor (19800 knot-ft) late in the
                    night.
GFDI................8.

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........92  91  94  94  93  94  96  95  95  95  94  97
Weather cov.....CHC CHC CHC CHC DEF DEF DEF DEF DEF DEF DEF DEF
Weather type....RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW
Tstm cov........
Temp............48  46  44  42  40  39  38  37  37  37  38  38
RH..............47  51  57  67  76  79  85  96  96  96  96  96
20 FT wind dir..E   E   E   E   E   E   E   E   E   E   E   E
20 FT wind spd..20  20  21  22  22  22  22  22  22  21  20  20
20 FT wind gust.26  26  29  30  30  30  30  30  30  30  29  29
Mix hgt (kft)...3.0 2.9 2.8 2.5 2.4 2.1 1.6 1.4 1.4 0.9 0.9 1.1
Transp wind dir.E   E   E   E   E   E   E   E   E   E   E   E
Transp wind spd.25  28  29  30  29  28  28  28  25  25  24  24
GFDI............10  9   10  9   8   7   7   6   6   6   5   5
Smoke Dispersal.66  69  70  66  60  50  38  33  30  21  20  23
Smoke Cat.......GD  GD  GD  GD  FR  FR  PR  PR  PR  PR  PR  PR

.THURSDAY...

Sky/weather.........Cloudy (85-95 percent). Rain showers through
                    the day. Slight chance of thunderstorms late in
                    the morning, then chance of thunderstorms in
                    the afternoon.
Max temperature.....Around 59.
Min humidity........80 percent.
Wind (20 ft)........East winds 18 to 21 mph shifting to the
                    southwest around 21 mph late in the afternoon.
                    Gusty and erratic winds expected near
                    thunderstorms in the late morning and
                    afternoon.
Mixing height.......2500 ft AGL.
Transport winds.....Southeast 20 to 24 mph shifting to the south 20
                    to 21 mph late in the afternoon.
Smoke dispersal.....Poor (13200 knot-ft) early in the morning
                    increasing to fair (42800 knot-ft) in the
                    afternoon.
GFDI................7.

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........96  93  96  94  93  93  92  90  86  84  84  82
Weather cov.....DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF DEF
Weather type....RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW
Tstm cov........                SCH SCH SCH CHC CHC CHC CHC CHC
Temp............38  38  40  42  44  47  49  52  54  57  58  56
RH..............100 100 96  96  93  93  93  89  90  83  80  80
20 FT wind dir..E   E   E   E   E   SE  SE  S   S   S   S   SW
20 FT wind spd..21  21  21  20  18  18  18  18  20  20  21  21
20 FT wind gust.29  28  29  29  28  26  25  25  25  26  28  28
Mix hgt (kft)...0.9 0.9 1.2 1.1 0.9 0.8 0.8 1.0 1.5 2.1 2.5 2.5
Transp wind dir.E   SE  SE  SE  E   SE  SE  SE  S   S   S   SW
Transp wind spd.23  24  21  20  20  20  21  21  21  20  21  21
GFDI............5   5   6   5   5   5   5   6   6   7   8   8
Smoke Dispersal.18  20  22  19  15  13  14  17  26  36  43  41
Smoke Cat.......PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  FR  FR

$$
Forecaster...Bury
Requested by...Logan McEwan
Type of request...PRESCRIBED
.TAG 2608798.0/DMX
.DELDT 04/01/26
.FormatterVersion 2.0.0
.EMAIL logan.mcewan@dnr.iowa.gov