727
FNUS73 KDMX 161359
FWSDMX

Spot Forecast for Jennett Heritage Area...Story County Conservation
National Weather Service Des Moines IA
859 AM CDT Thu May 16 2024

Forecast is based on ignition time of 1300 CDT on May 16.
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...

Westerly wind around 280 to 290 degrees will become established
this morning and persist through the day. The wind will be breezy
at times with some gusts near 20 mph. Mixing heights will
gradually increase through the day as well after starting low this
morning. No precipitation is expected today.

.REST OF TODAY...

Sky/weather.........Sunny (15-25 percent).
Max temperature.....Around 76.
Min humidity........41 percent.
Wind (20 ft)........West winds 9 to 12 mph.
Mixing height.......5800 ft AGL.
Transport winds.....West 15 to 16 mph.
Smoke dispersal.....Good (56700 knot-ft) early in the morning
                    increasing to excellent (75400 knot-ft) in the
                    afternoon.
GFDI................0.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

TIME (CDT)      1PM 2PM 3PM 4PM 5PM
Sky (%).........24  21  18  14  18
Weather cov.....
Weather type....
Tstm cov........
Temp............70  72  74  75  75
RH..............55  49  44  41  41
20 FT wind dir..W   W   W   W   NW
20 FT wind spd..12  12  12  10  9
20 FT wind gust.14  14  16  14  14
Mix hgt (kft)...4.4 4.7 5.0 5.3 5.8
Transp wind dir.W   W   W   W   W
Transp wind spd.15  15  16  15  15
GFDI............0   0   0   0   0
Haines index....4   4   4   4   4
SDspl kt-ft/100057  61  69  69  75

.TONIGHT...

Sky/weather.........Mostly clear (5-15 percent).
Min temperature.....Around 53.
Max humidity........86 percent.
Wind (20 ft)........Northwest winds 5 to 8 mph early in the evening
                    becoming light.
Mixing height.......400 ft AGL.
Transport winds.....Northwest 6 to 13 mph shifting to the south 5
                    to 6 mph overnight.
Smoke dispersal.....Excellent (63800 knot-ft) early in the evening
                    decreasing to poor (1600 knot-ft) late in the
                    night.
GFDI................0.
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 (%).........14     6      7      3      3      5
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Temp............75     71     62     60     57     54
RH..............41     49     65     69     77     86
20 ft wind......NW 8   NW 5   W 3    SW 2   S 2    S 3
20 ft wind gust.13     7      5      3      3      5
Mix hgt (ft)....5800   500    400    400    400    400
Transport wind..W 13   NW 7   NW 6   NW 7   S 6    S 5
GFDI............0      0      0      0      0      0
Haines index....4      5      5      5      4      4
SDspl kt-ft/100064     3      2      2      2      2

.FRIDAY...

Sky/weather.........Sunny (0-10 percent).
Max temperature.....Around 82.
Min humidity........33 percent.
Wind (20 ft)........Light winds becoming south 5 to 9 mph in the
                    late morning and afternoon.
Mixing height.......6100 ft AGL.
Transport winds.....South 3 to 9 mph.
Smoke dispersal.....Poor (1600 knot-ft) early in the morning
                    increasing to good (48700 knot-ft) in the
                    afternoon.
GFDI................0.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.

TIME (CDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........6         1         8         9
Weather cov.....
Weather type....NONE      NONE      NONE      NONE
Tstm cov........
Temp............53        64        77        81
RH..............89        73        42        34
20 FT wind......S 2G3     S 5G6     S 8G13    S 9G14
Mix hgt (ft)....400       1300      4600      6000
Transport wind..S 5       SW 3      S 7       S 9
GFDI............0         0         0         0
Haines index....4         5         5         5
SDspl kt-ft/10002         4         30        46

$$
Forecaster...Donavon
Requested by...Brandon Clough
Type of request...PRESCRIBED
.TAG 2414400.0/DMX
.DELDT 05/16/24
.FormatterVersion 2.0.0
.EMAIL bclough@storycountyiowa.gov