117
FNUS73 KOAX 231346
FWSOAX

Spot Forecast for Wallis CRP SE...Iowa DNR
National Weather Service Omaha/Valley NE
846 AM CDT Wed Jul 23 2025

Forecast is based on ignition time of 1000 CDT on July 23.
If conditions become unrepresentative, contact the National Weather
Service.

...HEAT ADVISORY IN EFFECT FROM NOON TODAY TO 8 PM CDT THIS
EVENING...

.DISCUSSION...

Mostly sunny, hot, and humid conditions will prevail through the
burn time today. Temperature at ignition will be 83-85 degrees in
the shade, much warmer in the sunny areas. Dewpoints are in the
low to mid 70s all day, which will keep RH in the 50-70% range
even with the hot temperatures (lower RH in the sunny areas). Do
expect winds gusting out of the south at 18-24 mph (at 30 foot,
less at eye level). Smoke dispersal will be fair early, but should
become quite good by noon as mixing heights increase and winds
below the inversion also increase a bit.

Strongest Possible Wind Speeds on Day of Burn: 25 mph gust

Lowest Possible Relative Humidity on Day of Burn: 50%, although
lower in sun-drenched areas.

.REST OF TODAY...

Sky/weather.........Sunny (0-10 percent).
Max temperature.....Around 94.
Min humidity........56 percent.
Eye level winds.....South winds 7 to 8 mph with gusts to around 14
                    mph.
Surface winds (mph).South winds 11 to 13 mph with gusts to around
                    23 mph.
Wind (20 ft)........South winds 9 to 12 mph with gusts to around 18
                    mph.
Mixing height.......3800 ft AGL.
Transport winds.....South 18 to 22 mph.
Smoke dispersal.....Fair (23100 knot-ft) early in the morning
                    increasing to excellent (72800 knot-ft) in the
                    afternoon.
GFDI................0.

TIME (CDT)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........6   3   5   2   2   4   6   8
Weather cov.....
Weather type....
Tstm cov........
Temp............82  85  87  90  92  92  93  91
RH..............72  67  68  64  58  58  56  60
20 FT wind dir..S   S   S   S   S   S   S   S
20 FT wind spd..10  10  10  10  10  10  10  9
20 FT wind gust.18  18  18  18  18  18  18  17
Eye lvl wnd dir.S   S   S   S   S   S   S   S
Eye lvl wnd spd.8   8   8   8   8   8   8   7
Eye lvl wnd gst.14  14  13  13  13  13  13  13
Surface wnd dir.S   S   S   S   S   S   S   S
Surface wnd spd.13  13  13  13  13  13  13  11
Surface wnd gst.23  23  22  22  22  22  22  21
Mix hgt (kft)...1.4 1.9 2.1 2.5 3.2 3.6 3.8 3.1
Transp wind dir.S   S   S   S   S   S   S   S
Transp wind spd.18  20  18  20  21  22  22  20
GFDI............0   0   0   0   0   0   0   0
SDspl kt-ft/100023  29  35  42  56  69  73  59

.TONIGHT...

Sky/weather.........Partly cloudy (25-35 percent) then becoming
                    mostly cloudy (75-85 percent). Showers and
                    thunderstorms in the evening, then showers and
                    thunderstorms likely overnight.
Min temperature.....Around 68.
Max humidity........100 percent.
Eye level winds.....South winds up to 6 mph with gusts to around 12
                    mph early in the evening shifting to the west
                    around 6 mph, then shifting to the north around
                    4 mph late in the evening shifting to the
                    northeast shifting to the southeast overnight
                    becoming light.
Surface winds (mph).South winds 8 to 10 mph with gusts to around 20
                    mph early in the evening shifting to the west
                    around 10 mph, then shifting to the north
                    around 8 mph late in the evening shifting to
                    the northeast shifting to the southeast around
                    6 mph overnight becoming light.
Wind (20 ft)........South winds 5 to 6 mph with gusts to around 16
                    mph early in the evening shifting to the east
                    around 6 mph, then shifting to the northwest
                    around 5 mph late in the evening shifting to
                    the northeast shifting to the southeast
                    overnight becoming light. Gusty and erratic
                    winds expected near thunderstorms early in the
                    evening.
Mixing height.......400 ft AGL.
Transport winds.....South 14 to 17 mph shifting to the northwest
                    late in the evening, then shifting to the east
                    around 10 mph overnight shifting to the west
                    around 12 mph overnight shifting to the north
                    around 15 mph shifting to the east around 8 mph
                    after 3 am shifting to the southeast shifting
                    to the southwest around 5 mph early in the
                    morning.
Smoke dispersal.....Good (37300 knot-ft) early in the evening
                    decreasing to poor (2500 knot-ft) late in the
                    night.
GFDI................0.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........24     67     87     83     86     85
Weather cov.....       CHANCE LIKELY LIKELY LIKELY LIKELY
Weather type....NONE   RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR
Tstm cov........       CHANCE LIKELY LIKELY LIKELY LIKELY
Temp............90     84     77     72     71     70
RH..............64     74     90     100    93     97
20 ft wind......S 8    S 6    W 8    NE 6   SE 5   S 4
20 ft wind gust.16     13     14     10     8      8
Eye level wind..S 6    S 4    W 6    NE 4   SE 4   S 3
Eye lvl wnd gst.12     10     11     7      6      6
Surface wind....S 10   S 8    W 10   NE 8   SE 6   S 5
Surface wnd gst.20     16     18     12     10     10
Mix hgt (ft)....2300   400    400    400    500    400
Transport wind..S 17   S 14   W 12   E 10   N 15   SE 8
GFDI............0      0      0      0      0      0
SDspl kt-ft/100037     9      4      4      4      3

.THURSDAY...

Sky/weather.........Mostly cloudy (70-80 percent). Showers and
                    thunderstorms likely in the morning, then
                    chance of showers and thunderstorms in the
                    afternoon.
Max temperature.....Around 81.
Min humidity........72 percent.
Eye level winds.....Light winds becoming north around 4 mph in the
                    afternoon.
Surface winds (mph).Light winds becoming north around 6 mph in the
                    afternoon.
Wind (20 ft)........Light winds becoming north around 5 mph in the
                    afternoon. Gusty and erratic winds expected
                    near thunderstorms early in the morning. Gusty
                    and erratic winds expected near thunderstorms
                    in the late morning and afternoon.
Mixing height.......2700 ft AGL.
Transport winds.....Southwest 6 to 7 mph shifting to the north in
                    the afternoon.
Smoke dispersal.....Poor (2200 knot-ft) early in the morning
                    increasing to fair (15900 knot-ft) in the
                    afternoon.
GFDI................0.

TIME (CDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky (%).........82     74     72     66     70     67
Weather cov.....LIKELY CHANCE CHANCE CHANCE CHANCE CHANCE
Weather type....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR
Tstm cov........LIKELY CHANCE S CHC  S CHC  S CHC  CHANCE
Temp............69     71     75     77     80     81
RH..............97     93     87     82     74     72
20 ft wind......W 4    W 3    NW 4   N 5    N 5    N 5
20 ft wind gust.6      6      7      10     10     8
Eye level wind..W 3    W 2    NW 3   N 4    N 4    N 4
Eye lvl wnd gst.5      5      5      7      7      6
Surface wind....W 5    W 4    NW 5   N 6    N 6    N 6
Surface wnd gst.8      8      9      12     12     10
Mix hgt (ft)....700    700    1300   1900   2500   2600
Transport wind..SW 7   SW 7   W 6    NW 7   N 6    N 7
GFDI............0      0      0      0      0      0
SDspl kt-ft/10002      4      6      9      13     16

$$
Forecaster...Barjenbruch
Requested by...Jeff Seago
Type of request...PRESCRIBED
.TAG 2518451.0/OAX
.DELDT 07/23/25
.FormatterVersion 2.0.0
.EMAIL jeffrey.seago@dnr.iowa.gov