739
FNUS73 KDMX 041002
FWSDMX

Spot Forecast for Kalsow Prairie Fall Burn...Iowa DNR
National Weather Service Des Moines IA
502 AM CDT Fri Oct 4 2024

Forecast is based on ignition time of 0700 CDT on October 04.
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...

Easterly wind will persist through the day today and is expected
to remain and may be breezy at times. The minimum relative
humidity values will fall into the 30s this afternoon. The shallow
mixing depth this morning will limit smoke dispersal this morning
before the mixing depth increases into the afternoon.

.REST OF TODAY...

Sky/weather.........Sunny (0-5 percent).
Max temperature.....Around 73.
Min humidity........33 percent.
Wind (20 ft)........Northeast winds around 10 mph shifting to the
                    east 7 to 9 mph in the afternoon.
Mixing height.......4300 ft AGL.
Transport winds.....East 12 to 18 mph decreasing to around 10 mph
                    late in the afternoon.
GFDI................1.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

TIME (CDT)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........2   2   0   0   1   1   1   1   2   1   0
Weather cov.....
Weather type....
Tstm cov........
Temp............49  50  51  57  62  66  69  71  72  73  72
RH..............61  61  59  47  41  37  36  35  34  33  34
20 FT wind dir..NE  NE  NE  E   E   E   E   E   E   E   E
20 FT wind spd..10  10  10  10  10  10  9   9   8   8   7
20 FT wind gust.13  13  16  17  17  16  15  14  15  14  13
Mix hgt (kft)...0.4 0.5 1.2 1.2 1.8 2.5 3.0 3.5 4.0 4.3 4.1
Transp wind dir.NE  NE  E   E   E   E   E   E   E   E   E
Transp wind spd.16  14  18  17  17  15  13  12  12  10  10
GFDI............1   1   1   1   1   1   1   1   1   1   1
Haines index....4   4   4   4   4   4   4   4   4   4   4

.TONIGHT...

Sky/weather.........Mostly clear (10-20 percent).
Min temperature.....Around 52.
Max humidity........100 percent.
Wind (20 ft)........Southeast winds 6 to 13 mph.
Mixing height.......400 ft AGL.
Transport winds.....Southeast 10 to 17 mph.
GFDI................1.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........0      2      3      2      9      27
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Temp............71     59     55     53     52     53
RH..............36     55     69     80     89     93
20 ft wind......E 6    E 7    SE 8   SE 9   SE 10  SE 12
20 ft wind gust.12     12     14     14     15     17
Mix hgt (ft)....1200   400    400    400    400    400
Transport wind..E 10   E 12   SE 15  SE 17  SE 16  S 15
GFDI............1      1      0      0      0      1
Haines index....4      4      4      4      4      4

.SATURDAY...

Sky/weather.........Sunny (15-25 percent).
Max temperature.....Around 87.
Min humidity........33 percent.
Wind (20 ft)........South winds 13 to 22 mph shifting to the west
                    21 to 22 mph with gusts to around 33 mph late
                    in the afternoon.
Mixing height.......5700 ft AGL.
Transport winds.....South 16 to 24 mph increasing to southwest 28
                    to 32 mph in the afternoon, then shifting to
                    the west around 28 mph late in the afternoon.
GFDI................4.
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 (%).........32        22        11        9
Weather cov.....
Weather type....NONE      NONE      NONE      NONE
Tstm cov........
Temp............52        59        76        87
RH..............100       90        54        35
20 FT wind......SE 13G18  S 17G24   S 23G32   SW 21G33
Mix hgt (ft)....500       1000      2200      4800
Transport wind..S 16      S 20      S 28      SW 32
GFDI............1         1         4         6
Haines index....4         4         4         5

$$
Forecaster...Donavon
Requested by...Jeff Feisel
Type of request...PRESCRIBED
.TAG 2423515.0/DMX
.DELDT 10/04/24
.FormatterVersion 2.0.0
.EMAIL jeffrey.feisel@dnr.iowa.gov