475
FNUS73 KDMX 211227
FWSDMX

Spot Forecast for Deep River Timber Rx...Poweshiek County Conservation Board
National Weather Service Des Moines IA
727 AM CDT Tue Jul 21 2026

Forecast is based on ignition time of 0800 CDT on July 21.
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...

Wind will be out of the north at 10-15 mph with gusts up to 25
mph. Relative humidity this afternoon will fall to around 50%.
Skies may be hazy with wildfire smoke aloft. The afternoon high
will reach around 82.

.REST OF TODAY...

Sky/weather.........Mostly sunny (25-35 percent). Patchy smoke
                    early in the morning. Patchy smoke late in the
                    afternoon.
Temperature.........73 at ignition...Max 82.
RH..................81 percent at ignition...Min 53 percent.
Wind (20 ft)........Winds northwest at 13 mph at
                    ignition...otherwise Northwest winds 13 to 17
                    mph.
Mixing height.......900 ft AGL at ignition...otherwise 4600 ft AGL.
Transport winds.....Northwest 17 to 24 mph.
Smoke dispersal.....Poor /13400 knot-ft/ at ignition. Max...good
                    /91300 knot-ft/.
GFDI................0.

TIME (CDT)      8 AM         NOON         4 PM
Sky (%).........18           41           27
Weather cov.....PATCHY                    PATCHY
Weather type....SMOKE        NONE         SMOKE
Tstm cov........
Temp............73           77           81
RH..............81           67           56
20 FT wind......NW 13G24     NW 17G25     NW 15G24
Mix hgt (ft)....900          3700         4600
Transport wind..NW 17        NW 24        NW 23
GFDI............0            0            0
Smoke Dispersal.13           77           91
Smoke Cat.......POOR         GOOD         GOOD

.TONIGHT...

Sky/weather.........Mostly clear (10-20 percent). Patchy smoke.
Temperature.........Min 58.
RH..................Max 87 percent.
Wind (20 ft)........North winds 6 to 14 mph.
Mixing height.......400 ft AGL.
Transport winds.....North 12 to 21 mph decreasing to 10 to 12 mph
                    late in the evening.
Smoke dispersal.....Good (68900 knot-ft) early in the evening
                    decreasing to poor (4100 knot-ft) late in the
                    night.
GFDI................0.

TIME (CDT)      6 PM         10 PM        2 AM
Sky (%).........24           9            7
Weather cov.....PATCHY       PATCHY       PATCHY
Weather type....SMOKE        SMOKE        SMOKE
Tstm cov........
Temp............80           69           64
RH..............54           73           78
20 FT wind......NW 14G22     NW 7G13      N 6G13
Mix hgt (ft)....3800         500          400
Transport wind..NW 21        N 12         N 12
GFDI............0            0            0
Smoke Dispersal.69           5            4
Smoke Cat.......GOOD         POOR         POOR

.WEDNESDAY...

Sky/weather.........Mostly sunny (30-40 percent).
Temperature.........Max 77.
RH..................Min 47 percent.
Wind (20 ft)........North winds 5 to 6 mph.
Mixing height.......5300 ft AGL.
Transport winds.....North 8 to 10 mph.
Smoke dispersal.....Poor (3900 knot-ft) early in the morning
                    increasing to fair (47500 knot-ft) in the
                    afternoon.
GFDI................0.

TIME (CDT)      6 AM         10 AM        2 PM
Sky (%).........11           23           37
Weather cov.....
Weather type....NONE         NONE         NONE
Tstm cov........
Temp............58           69           75
RH..............90           66           52
20 FT wind......N 5G10       NE 6G10      N 6G12
Mix hgt (ft)....400          2500         5300
Transport wind..N 10         N 9          N 10
GFDI............0            0            0
Smoke Dispersal.4            20           48
Smoke Cat.......POOR         POOR         FAIR

$$
Forecaster...De Bruin
Requested by...Cole
Type of request...PRESCRIBED
.TAG 2617863.0/DMX
.DELDT 07/21/26
.FormatterVersion 2.0.0
.EMAIL crozen@poweshiekcountyiowa.gov