305
FNUS73 KDMX 091445
FWSDMX

Spot Forecast for Jennett Heritage Area...Story County Conservation
National Weather Service Des Moines IA
945 AM CDT Fri May 9 2025

Forecast is based on ignition time of 1100 CDT on May 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...

Mild and dry today with a high near 77 and relative humidity
dropping near 25-30% this afternoon. Wind will be light,
beginning out of the east-southeast this morning and shifting to
out of the northeast this afternoon. The boundary will remain
draped across central Iowa and fluctuations from northeast to
southeast will be possible off and on today. Wind will be light at
5 to 10 mph.

.REST OF TODAY...

Sky/weather.........Sunny (0-10 percent).
Max temperature.....Around 77.
Min humidity........28 percent.
Wind (20 ft)........Light winds.
Mixing height.......4500 ft AGL.
Transport winds.....Southeast around 6 mph shifting to the
                    northeast 5 to 7 mph in the afternoon.
Smoke dispersal.....Poor (10200 knot-ft) early in the morning
                    increasing to fair (26900 knot-ft) in the
                    afternoon.
GFDI................0.

TIME (CDT)      11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........8   5   5   6   5   3   3
Weather cov.....
Weather type....
Tstm cov........
Temp............64  67  69  72  74  75  75
RH..............43  39  37  33  30  28  30
20 FT wind dir..S   S   SE  E   SE  SE  S
20 FT wind spd..2   2   2   2   2   2   2
20 FT wind gust.
Mix hgt (kft)...2.0 2.8 3.5 3.9 4.5 4.4 4.3
Transp wind dir.SE  NE  NE  NE  NE  NE  NE
Transp wind spd.6   6   6   5   7   6   6
GFDI............0   0   0   0   0   0   0
Smoke Dispersal.10  14  17  16  27  22  22
Smoke Cat.......PR  PR  PR  PR  PR  PR  PR

.TONIGHT...

Sky/weather.........Mostly clear (0-10 percent).
Min temperature.....Around 52.
Max humidity........67 percent.
Wind (20 ft)........Light winds becoming south 5 to 6 mph in the
                    evening and overnight, then shifting to the
                    southwest after 3 am.
Mixing height.......400 ft AGL.
Transport winds.....Northeast around 5 mph shifting to the south 6
                    to 12 mph in the evening and overnight, then
                    shifting to the west 9 to 10 mph after 3 am.
Smoke dispersal.....Fair (16400 knot-ft) early in the evening
                    decreasing to poor (2900 knot-ft) late in the
                    night.
GFDI................0.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........3      3      4      8      10     8
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Temp............76     72     63     58     56     54
RH..............31     39     52     58     61     67
20 ft wind......S 3    S 5    S 6    S 6    SW 6   SW 6
20 ft wind gust.       6      8      9      8      7
Mix hgt (ft)....4100   500    400    400    400    400
Transport wind..NE 5   S 8    S 10   S 10   SW 10  W 9
GFDI............0      0      0      0      0      0
Smoke Dispersal.16     3      4      4      4      3
Smoke Cat.......POOR   POOR   POOR   POOR   POOR   POOR

.SATURDAY...

Sky/weather.........Sunny (0-10 percent).
Max temperature.....Around 81.
Min humidity........30 percent.
Wind (20 ft)........Southwest winds 5 to 6 mph shifting to the
                    northeast around 8 mph late in the afternoon.
Mixing height.......4700 ft AGL.
Transport winds.....Northwest 9 to 10 mph shifting to the northeast
                    10 to 12 mph late in the afternoon.
Smoke dispersal.....Poor (2900 knot-ft) early in the morning
                    increasing to good (47000 knot-ft) in the
                    afternoon.
GFDI................0.

TIME (CDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........6         4         2         3
Weather cov.....
Weather type....NONE      NONE      NONE      NONE
Tstm cov........
Temp............52        61        75        80
RH..............73        67        43        32
20 FT wind......SW 5G8    NW 6G10   N 7G12    NE 8G13
Mix hgt (ft)....400       1300      2900      4300
Transport wind..W 9       N 12      NE 15     NE 12
GFDI............0         0         0         0
Smoke Dispersal.3         13        37        45
Smoke Cat.......POOR      POOR      POOR      FAIR

$$
Forecaster...Hagenhoff
Requested by...Brandon Clough
Type of request...PRESCRIBED
.TAG 2513636.0/DMX
.DELDT 05/09/25
.FormatterVersion 2.0.0
.EMAIL bclough@storycountyiowa.gov