327
FNUS73 KDMX 101256
FWSDMX

Spot Forecast for Thomas Mitchell Prescribed Fire...Polk County Conservation Board
National Weather Service Des Moines IA
756 AM CDT Mon Jun 10 2024

Forecast is based on ignition time of 0800 CDT on June 10.
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...

No fire weather concerns expected today with light winds out of
the northeast this morning switching to be out of the east to
southeast this afternoon into evening. Minimum relative humidity
values fall to around 35-40% this afternoon.


.REST OF TODAY...

Sky/weather.........Sunny (15-25 percent).
Max temperature.....Around 75.
Min humidity........38 percent.
Wind (20 ft)........Northeast winds 5 to 8 mph.
Mixing height.......5000 ft AGL.
Transport winds.....Northeast 6 to 12 mph.
Smoke dispersal.....Poor (12400 knot-ft) early in the morning
                    increasing to good (31100 knot-ft) in the
                    afternoon.
GFDI................0.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.

TIME (CDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........6   9   17  25  32  23  14  12  5   10
Weather cov.....
Weather type....
Tstm cov........
Temp............60  62  65  67  69  71  73  74  75  75
RH..............75  68  62  56  51  47  44  41  38  38
20 FT wind dir..NE  NE  NE  NE  NE  NE  NE  NE  NE  E
20 FT wind spd..6   6   7   7   8   8   7   6   5   5
20 FT wind gust.            12  12  12  10  10  8   9
Mix hgt (kft)...1.2 2.2 3.1 3.7 4.2 4.4 4.8 4.9 5.0 5.0
Transp wind dir.NE  NE  NE  NE  NE  NE  NE  NE  NE  NE
Transp wind spd.12  12  10  9   8   8   7   6   6   6
GFDI............0   0   0   0   0   0   0   0   0   0
Haines index....5   5   5   5   5   5   5   5   5   5
SDspl kt-ft/100012  22  28  29  29  31  29  24  25  25

.TONIGHT...

Sky/weather.........Mostly clear (15-25 percent).
Min temperature.....Around 53.
Max humidity........72 percent.
Wind (20 ft)........Southeast winds 5 to 6 mph becoming 5 to 7 mph
                    overnight.
Mixing height.......300 ft AGL.
Transport winds.....Northeast 5 to 6 mph shifting to the south
                    after 3 am.
Smoke dispersal.....Fair (23200 knot-ft) early in the evening
                    decreasing to poor (1700 knot-ft) late in the
                    night.
GFDI................0.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........14     4      13     24     30     32
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Temp............75     72     64     59     57     56
RH..............38     42     56     64     67     69
20 ft wind......E 6    SE 6   SE 5   SE 5   SE 6   S 6
20 ft wind gust.9      8      8      9      10     12
Mix hgt (ft)....4600   400    300    300    300    300
Transport wind..NE 6   E 5    SE 8   S 9    S 9    S 10
GFDI............0      0      0      0      0      0
Haines index....5      5      5      5      5      5
SDspl kt-ft/100023     2      2      3      3      3

.TUESDAY...

Sky/weather.........Mostly sunny (40-50 percent). Slight chance of
                    rain showers late in the morning.
Max temperature.....Around 82.
Min humidity........51 percent.
Wind (20 ft)........South winds 7 to 14 mph shifting to the
                    southwest around 13 mph late in the afternoon.
Mixing height.......3300 ft AGL.
Transport winds.....Southwest 10 to 18 mph.
Smoke dispersal.....Poor (3000 knot-ft) early in the morning
                    increasing to good (52900 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 (%).........33        44        59        50
Weather cov.....                    S CHC
Weather type....NONE      NONE      RNSHWR    NONE
Tstm cov........
Temp............54        63        73        78
RH..............74        67        55        54
20 FT wind......S 7G13    S 10G18   S 13G21   SW 13G22
Mix hgt (ft)....300       1400      2900      2800
Transport wind..S 10      S 15      SW 18     SW 17
GFDI............0         0         0         0
Haines index....5         4         4         4
SDspl kt-ft/10003         19        46        41

$$
Forecaster...KCM
Requested by...Douglas Todey
Type of request...PRESCRIBED
.TAG 2415894.0/DMX
.DELDT 06/10/24
.FormatterVersion 2.0.0
.EMAIL douglas.todey@polkcountyiowa.gov