588
FNUS73 KDMX 201630
FWSDMX

Spot Forecast for Brush Pile Burn...Iowa DNR
National Weather Service Des Moines IA
1030 AM CST Thu Feb 20 2025

Forecast is based on ignition time of 1100 CST on February 20.
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...

Sunny conditions with light northwest winds of 5 to 10 mph. Smoke
dispersal is modest due to the lower boundary layer inversion
height as low as 1400` late this morning.

.REST OF TODAY...

Sky/weather.........Sunny (5-15 percent).
Max temperature.....Around 13.
Min humidity........55 percent.
Wind (20 ft)........Northwest winds 7 to 9 mph.
Mixing height.......2300 ft AGL.
Transport winds.....Northwest 9 to 13 mph.
Smoke dispersal.....Fair (14100 knot-ft).
Smoke dispersal.....Fair (14100 knot-ft).
GFDI................2.

TIME (CST)      11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........4   6   10  10  10  11  7
Weather cov.....
Weather type....
Tstm cov........
Temp............5   8   10  12  13  13  12
RH..............63  60  57  55  55  58  60
20 FT wind dir..NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..9   9   9   9   9   9   7
20 FT wind gust.10  10  10  10  10  10
Mix hgt (kft)...1.7 1.8 2.0 2.3 2.2 2.0 1.8
Transp wind dir.N   NW  NW  NW  NW  NW  NW
Transp wind spd.13  12  12  10  12  12  9
GFDI............2   1   1   1   1   1   1
Vrate kt-ft/1K..19  18  21  20  22  20  14
Ventrate Cat....PR  PR  PR  PR  PR  PR  PR
SDspl kt-ft/100019  18  21  20  22  20  14

.TONIGHT...

Sky/weather.........Mostly clear (5-15 percent).
Min temperature.....Around 7 below.
Max humidity........89 percent.
Wind (20 ft)........Northwest winds 5 to 6 mph in the evening
                    becoming light, then becoming west around 5 mph
                    overnight.
Mixing height.......300 ft AGL.
Transport winds.....West 6 to 8 mph.
Smoke dispersal.....Poor (1400 knot-ft).
Smoke dispersal.....Poor (1400 knot-ft).
GFDI................1.

TIME (CST)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........7      6      4      3      9      10
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Temp............9      2      1      -1     -4     -5
RH..............68     87     83     83     85     88
20 ft wind......NW 6   NW 5   W 5    W 5    W 5    W 5
20 ft wind gust.       8      6      6      6      6
Mix hgt (ft)....400    400    300    300    300    300
Transport wind..NW 8   NW 7   NW 6   W 6    W 6    W 6
GFDI............1      1      0      0      0      0
Vrate kt-ft/1K..3      2      2      2      2      1
Ventrate Cat....POOR   POOR   POOR   POOR   POOR   POOR
SDspl kt-ft/10003      2      2      2      2      1

.FRIDAY...

Sky/weather.........Sunny (0-10 percent).
Max temperature.....Around 17.
Min humidity........67 percent.
Wind (20 ft)........Light winds becoming southwest 6 to 10 mph in
                    the late morning and afternoon.
Mixing height.......2100 ft AGL.
Transport winds.....Southwest 5 to 14 mph increasing to 13 to 17
                    mph in the afternoon.
Smoke dispersal.....Poor (1200 knot-ft) early in the morning
                    increasing to good (31900 knot-ft) in the
                    afternoon.
Smoke dispersal.....Poor (1200 knot-ft) early in the morning
                    increasing to good (31900 knot-ft) in the
                    afternoon.
GFDI................1.

TIME (CST)      6 AM      9 AM      NOON      3 PM
Sky (%).........7         5         7         6
Weather cov.....
Weather type....NONE      NONE      NONE      NONE
Tstm cov........
Temp............-7        0         10        16
RH..............89        87        76        67
20 FT wind......W 3G6     SW 3G6    SW 9G14   SW 10G17
Mix hgt (ft)....300       500       1500      2100
Transport wind..W 5       SW 8      SW 14     SW 17
GFDI............0         0         1         2
Vrate kt-ft/1K..1         4         18        32
Ventrate Cat....POOR      POOR      POOR      POOR
SDspl kt-ft/10001         4         18        32

$$
Forecaster...Vachalek
Requested by...Brian Andera
Type of request...PRESCRIBED
.TAG 2503307.0/DMX
.DELDT 02/20/25
.FormatterVersion 2.0.0
.EMAIL brian.andera@dnr.iowa.gov