614
FNUS73 KDMX 280753
FWSDMX

Spot Forecast for Chichaqua Prescribed Fire - Darnell East...Polk County Conservation
National Weather Service Des Moines IA
253 AM CDT Fri Aug 28 2026

Forecast is based on ignition time of 1000 CDT on August 28.
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...

Fire weather concerns remain low today, with light winds and
minimum relative humidity values in the 40-50% range.

.REST OF TODAY...

Sky/weather.........Sunny (10-20 percent).
Temperature.........72 at ignition...Max 85.
RH..................73 percent at ignition...Min 46 percent.
Wind (20 ft)........Winds southwest at 2 mph at
                    ignition...otherwise Light winds becoming
                    southwest around 5 mph early in the afternoon,
                    then becoming light late in the afternoon
                    becoming south around 5 mph late in the
                    afternoon.
Mixing height.......1100 ft AGL at ignition...otherwise 4900 ft
                    AGL.
Transport winds.....Southwest 6 to 8 mph.
Smoke dispersal.....Poor /5300 knot-ft/ at ignition. Max...poor
                    /31400 knot-ft/.
GFDI................0.

TIME (CDT)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........6   3   11  10  21  19  28  21
Weather cov.....
Weather type....
Tstm cov........
Temp............72  76  79  81  82  83  84  84
RH..............73  64  58  54  51  49  46  46
20 FT wind dir..SW  SW  SW  SW  SW  S   S   S
20 FT wind spd..2   3   5   5   5   5   3   5
20 FT wind gust.6   6   7   8   8   7   7   8
Mix hgt (kft)...1.1 2.7 4.3 4.6 4.8 4.9 4.8 4.5
Transp wind dir.SW  SW  SW  SW  SW  SW  S   S
Transp wind spd.6   8   7   6   6   7   7   8
GFDI............0   0   0   0   0   0   0   0
Smoke Dispersal.5   19  26  23  24  29  29  31
Smoke Cat.......PR  PR  PR  PR  PR  PR  PR  PR

.TONIGHT...

Sky/weather.........Partly cloudy (30-40 percent) then becoming
                    mostly cloudy (55-65 percent).
Temperature.........Min 68.
RH..................Max 73 percent.
Wind (20 ft)........Light winds becoming southeast 5 to 8 mph.
Mixing height.......400 ft AGL.
Transport winds.....South 8 to 15 mph.
Smoke dispersal.....Poor (3300 knot-ft).
GFDI................0.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........18     35     32     30     47     68
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Temp............82     78     72     71     70     69
RH..............51     60     71     71     73     73
20 ft wind......S 3    SE 6   SE 7   S 7    S 8    S 8
20 ft wind gust.7      9      12     12     13     15
Mix hgt (ft)....2100   400    400    400    500    500
Transport wind..S 8    SE 9   S 10   S 13   S 14   S 15
GFDI............0      0      0      0      0      0
Smoke Dispersal.15     3      4      5      5      6
Smoke Cat.......POOR   POOR   POOR   POOR   POOR   POOR

.SATURDAY...

Sky/weather.........Mostly cloudy (75-85 percent) then becoming
                    mostly sunny (20-30 percent). Showers likely
                    and slight chance of thunderstorms in the
                    morning, then slight chance of showers in the
                    afternoon.
Temperature.........Max 87.
RH..................Min 53 percent.
Wind (20 ft)........South winds 8 to 16 mph. Gusty and erratic
                    winds expected near thunderstorms early in the
                    morning.
Mixing height.......5400 ft AGL.
Transport winds.....South 12 to 20 mph increasing to 18 to 25 mph
                    late in the afternoon.
Smoke dispersal.....Poor (5000 knot-ft) early in the morning
                    increasing to good (86300 knot-ft) in the
                    afternoon.
GFDI................0.

TIME (CDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........85        82        68        33
Weather cov.....CHANCE    LIKELY    S CHC
Weather type....RNSHWR    RNSHWR    RNSHWR    NONE
Tstm cov........S CHC     S CHC
Temp............68        70        76        85
RH..............76        76        66        55
20 FT wind......S 8G15    S 12G20   S 15G23   S 15G25
Mix hgt (ft)....500       900       1200      4600
Transport wind..S 14      SE 13     S 16      S 20
GFDI............0         0         0         0
Smoke Dispersal.6         10        17        79
Smoke Cat.......POOR      POOR      POOR      GOOD

$$
Forecaster...Lee
Requested by...Douglas Todey
Type of request...PRESCRIBED
.TAG 2620737.0/DMX
.DELDT 08/28/26
.FormatterVersion 2.0.0
.EMAIL douglas.todey@polkcountyiowa.gov