000
FNUS73 KDMX 241313
FWSDMX

Spot Forecast for McFarland Park...Story County Conservation
National Weather Service Des Moines IA
813 AM CDT Wed Apr 24 2024

Forecast is based on ignition time of 1100 CDT on April 24.
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...

Minimal fire weather concerns today. Winds will be light starting
primarily out of the east northeast this morning, then switching
to more easterly by mid day and southeasterly through the
afternoon. Relative humidities will also bottom out around 25 to
30 percent this afternoon. The morning surface inversion will
become fully mixed out around noon to 1 pm as well.

.REST OF TODAY...

Sky/weather.........Sunny (0-10 percent).
Max temperature.....Around 64.
Min humidity........27 percent.
Wind (20 ft)........East winds 6 to 7 mph.
Mixing height.......4600 ft AGL.
Transport winds.....Northeast 7 to 8 mph.
Smoke dispersal.....Fair (18300 knot-ft).
GFDI................0.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

TIME (CDT)      11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........2   1   1   2   3   3   5
Weather cov.....
Weather type....
Tstm cov........
Temp............53  56  59  61  62  63  63
RH..............44  40  34  32  30  29  27
20 FT wind dir..E   E   E   E   E   E   E
20 FT wind spd..7   6   6   6   6   6   6
20 FT wind gust.9   8   8   7   8   7   7
Mix hgt (kft)...2.6 3.2 3.8 4.1 4.4 4.6 4.5
Transp wind dir.NE  NE  NE  NE  NE  NE  E
Transp wind spd.8   7   7   7   7   7   7
GFDI............0   0   0   0   0   0   0
Haines index....4   4   4   4   4   4   4
SDspl kt-ft/100018  20  23  24  26  28  28

.TONIGHT...

Sky/weather.........Partly cloudy (20-30 percent) then becoming
                    mostly cloudy (50-60 percent) then becoming
                    partly cloudy (40-50 percent).
Min temperature.....Around 42.
Max humidity........70 percent.
Wind (20 ft)........Southeast winds 7 to 9 mph.
Mixing height.......400 ft AGL.
Transport winds.....Southeast 8 to 15 mph.
Smoke dispersal.....Fair (28600 knot-ft) early in the evening
                    decreasing to poor (3900 knot-ft) late in the
                    night.
GFDI................0.
Haines Index........3 to 4 or very low to low potential for large
                    plume dominated fire growth.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........11     24     38     43     55     44
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Temp............62     58     50     48     46     44
RH..............28     34     48     51     60     68
20 ft wind......SE 7   E 7    E 7    SE 8   SE 9   SE 9
20 ft wind gust.8      10     10     15     16     16
Mix hgt (ft)....4300   2900   400    400    500    500
Transport wind..SE 8   SE 9   SE 10  SE 12  SE 14  SE 15
GFDI............0      0      0      0      0      0
Haines index....4      3      3      3      4      4
SDspl kt-ft/100028     22     4      5      5      6

.THURSDAY...

Sky/weather.........Partly sunny (50-60 percent).
Max temperature.....Around 67.
Min humidity........41 percent.
Wind (20 ft)........Southeast winds 10 to 18 mph increasing to
                    around 20 mph in the afternoon.
Mixing height.......4700 ft AGL.
Transport winds.....Southeast 15 to 24 mph increasing to 25 to 26
                    mph late in the afternoon.
Smoke dispersal.....Poor (7300 knot-ft) early in the morning
                    increasing to excellent (100500 knot-ft) in the
                    afternoon increasing to excellent (89400
                    knot-ft) late in the afternoon.
GFDI................1.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

TIME (CDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........47        53        57        63
Weather cov.....
Weather type....NONE      NONE      NONE      NONE
Tstm cov........
Temp............43        48        60        65
RH..............76        71        49        43
20 FT wind......SE 10G16  SE 14G20  SE 18G25  SE 20G28
Mix hgt (ft)....500       1600      3400      4500
Transport wind..SE 15     SE 20     SE 22     SE 25
GFDI............0         0         1         2
Haines index....4         4         4         4
SDspl kt-ft/10007         26        65        101

$$
Forecaster...Dodson
Requested by...Brandon Clough
Type of request...PRESCRIBED
.TAG 2412238.0/DMX
.DELDT 04/24/24
.FormatterVersion 2.0.0
.EMAIL bclough@storycountyiowa.gov