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000
FNUS73 KDMX 211503
FWSDMX

Spot Forecast for Horsley Area...Clay County, IA
National Weather Service Des Moines IA
1003 AM CDT Sun Apr 21 2024

Forecast is based on ignition time of 1400 CDT on April 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...

Sunshine and northwest winds increasing to around 15 mph at
ignition time. Relative humidity will remain low and range from 25
to 30% during the early to mid afternoon.

.REST OF TODAY...

Sky/weather.........Sunny (0-5 percent).
Max temperature.....Around 60.
Min humidity........24 percent.
Wind (20 ft)........West winds 14 to 15 mph.
Mixing height.......6800 ft AGL.
Transport winds.....West around 20 mph.
Smoke dispersal.....Excellent (105300 knot-ft).
GFDI................2.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

TIME (CDT)      2PM 3PM 4PM 5PM
Sky (%).........1   0   0   1
Weather cov.....
Weather type....
Tstm cov........
Temp............56  58  59  59
RH..............29  26  25  24
20 FT wind dir..W   W   W   W
20 FT wind spd..15  14  14  14
20 FT wind gust.20  20  20  18
Mix hgt (kft)...6.2 6.6 6.8 6.7
Transp wind dir.NW  W   W   W
Transp wind spd.20  20  20  20
GFDI............2   2   2   1
Haines index....4   4   4   4
SDspl kt-ft/1000105 112 115 114

.TONIGHT...

Sky/weather.........Mostly clear (10-20 percent).
Min temperature.....Around 36.
Max humidity........69 percent.
Wind (20 ft)........West winds 7 to 13 mph shifting to the
                    southwest 8 to 12 mph in the late evening and
                    overnight.
Mixing height.......400 ft AGL.
Transport winds.....West 10 to 16 mph shifting to the southwest 12
                    to 17 mph overnight.
Smoke dispersal.....Excellent (86200 knot-ft) early in the evening
                    decreasing to poor (3200 knot-ft) late in the
                    night.
GFDI................1.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........1      2      3      4      13     24
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Temp............60     54     45     41     38     36
RH..............24     34     47     57     64     69
20 ft wind......W 13   W 8    SW 8   SW 8   S 8    S 12
20 ft wind gust.17     12     10     10     13     20
Mix hgt (ft)....6200   700    400    400    400    500
Transport wind..W 16   W 12   SW 12  SW 10  S 14   S 17
GFDI............1      1      0      0      0      0
Haines index....4      5      5      5      5      5
SDspl kt-ft/100086     7      4      3      4      7

$$
Forecaster...Vachalek
Requested by...Marc Gustafson
Type of request...PRESCRIBED
.TAG 2411391.0/DMX
.DELDT 04/21/24
.FormatterVersion 2.0.0
.EMAIL mgustafson@claycounty.iowa.gov