412
FNUS73 KDMX 091449
FWSDMX

Spot Forecast for CBG - South of Observation Deck...Polk County Conservation
National Weather Service Des Moines IA
949 AM CDT Thu Oct 9 2025

Forecast is based on ignition time of 1100 CDT on October 09.
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...

Some clouds around near ignition time, but clearing out as the
burn continues. Winds from the south/southeast at 10 to 15 mph
with gusts up around 20 mph. So gusty today, but wind direction
should remain consistent. Temperatures rising into the lower 70s
this afternoon bringing RH values down in the mid to upper 30s.

.REST OF TODAY...

Sky/weather.........Sunny (10-20 percent).
Max temperature.....Around 73.
Min humidity........37 percent.
Wind (20 ft)........South winds 12 to 14 mph.
Mixing height.......4100 ft AGL.
Transport winds.....South 15 to 20 mph.
Smoke dispersal.....Fair (18400 knot-ft) early in the morning
                    increasing to excellent (66300 knot-ft) in the
                    afternoon.
GFDI................0.

TIME (CDT)      11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........20  20  13  10  7   9   8
Weather cov.....
Weather type....
Tstm cov........
Temp............60  65  68  70  71  72  73
RH..............55  46  40  39  38  37  37
20 FT wind dir..SE  S   S   S   S   S   S
20 FT wind spd..12  12  13  13  14  13  13
20 FT wind gust.18  20  20  21  21  21  20
Mix hgt (kft)...1.4 2.1 3.1 3.8 4.1 4.0 3.6
Transp wind dir.S   S   S   S   S   S   S
Transp wind spd.15  17  18  18  18  18  20
GFDI............0   0   0   0   0   0   0
Smoke Dispersal.18  32  50  61  66  64  62
Smoke Cat.......PR  PR  FR  GD  GD  GD  GD

.TONIGHT...

Sky/weather.........Mostly clear (20-30 percent) then becoming
                    mostly cloudy (70-80 percent). Chance of
                    showers and thunderstorms overnight.
Min temperature.....Around 56.
Max humidity........80 percent.
Wind (20 ft)........South winds 7 to 10 mph. Gusty and erratic
                    winds expected near thunderstorms overnight.
Mixing height.......500 ft AGL.
Transport winds.....South 13 to 17 mph.
Smoke dispersal.....Poor (5800 knot-ft).
GFDI................0.

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........10  12  18  30  39  65  77  85  86  78  72  70
Weather cov.....                            SCH CHC SCH SCH CHC
Weather type....                            RW  RW  RW  RW  RW
Tstm cov........                            SCH CHC SCH SCH CHC
Temp............71  67  65  61  60  60  60  61  61  59  58  58
RH..............42  50  54  62  62  62  62  60  65  72  77  80
20 FT wind dir..S   SE  SE  SE  S   S   S   S   S   S   S   S
20 FT wind spd..10  9   9   9   8   8   8   8   8   8   8   7
20 FT wind gust.18  15  15  15  15  16  14  15  14  14  14  14
Mix hgt (kft)...0.8 0.5 0.6 0.6 0.6 0.6 0.6 0.5 0.6 0.6 0.6 0.6
Transp wind dir.S   S   S   S   S   S   S   S   S   S   S   SW
Transp wind spd.13  13  14  15  17  16  15  15  13  14  14  15
GFDI............0   0   0   0   0   0   0   0   0   0   0   0
Smoke Dispersal.9   6   7   7   8   8   7   7   6   7   7   7
Smoke Cat.......PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR

$$
Forecaster...NC
Requested by...Lael Neal
Type of request...PRESCRIBED
.TAG 2523233.0/DMX
.DELDT 10/09/25
.FormatterVersion 2.0.0
.EMAIL lael.neal@polkcountyiowa.gov