971
FNUS73 KOAX 041246
FWSOAX

Spot Forecast for STP Piles...Pottawattamie Conservation
National Weather Service Omaha/Valley NE
746 AM CDT Tue Aug 4 2026

Forecast is based on ignition time of 0800 CDT on August 04.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...

A cold front pushed through the burn area early this morning.
Wind gusts of 15-25 mph are expected behind the front. RH will
slip to about 65%. Mostly cloudy skies are anticipated through the
day with spotty light showers possible all day, too. Precip
chances hit a minimum of about 10% at 11am and will peak near 40%
from 3pm to 9pm. Better chances are forecast after that.

Winds will develop a bit of an easterly component this afternoon,
but remain primarily out of the north. Speeds peak at 10-15 mph in
the afternoon.

Strongest Possible 30 ft Wind Speeds on Day of Burn: 14 mph

Lowest Possible Relative Humidity on Day of Burn: 58%

.REST OF TODAY...

Sky/weather.........Partly sunny (50-60 percent). Slight chance of
                    showers and thunderstorms early in the morning,
                    then chance of showers and thunderstorms in the
                    afternoon.
Max temperature.....Around 80.
Min humidity........64 percent.
Eye level winds.....North winds up to 8 mph.
Wind (30 ft)........North winds 8 to 13 mph.
Wind (20 ft)........North winds 6 to 12 mph. Gusty and erratic
                    winds expected near thunderstorms early in the
                    morning. Gusty and erratic winds expected near
                    thunderstorms early in the afternoon. Gusty and
                    erratic winds expected near thunderstorms late
                    in the afternoon.
Mixing height.......3100 ft AGL.
Transport winds.....North 10 to 16 mph.
Smoke dispersal.....Poor (9200 knot-ft) early in the morning
                    increasing to good (37400 knot-ft) in the
                    afternoon.
GFDI................0.

TIME (CDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........78  79  70  58  35  52  55  64  73  72
Weather cov.....SCH SCH SCH     SCH SCH CHC CHC CHC CHC
Weather type....RW  RW  RW      RW  RW  RW  RW  RW  RW
Tstm cov........SCH SCH SCH     SCH SCH SCH SCH CHC CHC
Temp............70  70  71  73  76  77  78  78  79  78
RH..............94  92  90  84  76  74  71  69  64  67
20 ft wind dir..N   N   N   N   N   N   N   N   NE  N
20 ft wind spd..6   6   7   8   8   9   9   9   10  9
20 ft wind gust.7   10  11  12  13  14  14  14  14  14
Eye lvl wnd dir.N   N   N   N   N   N   N   N   NE  N
Eye lvl wnd spd.4   4   5   6   6   7   7   7   8   7
Eye lvl wnd gst.5   7   8   9   10  10  11  11  11  11
30 ft wnd dir...N   N   N   N   N   N   N   N   NE  N
30 ft wnd spd...8   8   9   10  10  11  11  11  13  11
30 ft wnd gst...9   12  14  15  16  17  18  18  18  18
Mix hgt (kft)...1.0 1.4 1.7 1.7 2.2 2.6 3.0 3.1 2.7 2.3
Transp wind dir.N   N   N   N   N   N   N   N   N   N
Transp wind spd.10  13  14  13  14  13  14  15  16  14
GFDI............0   0   0   0   0   0   0   0   0   0
SDspl kt-ft/10009   15  20  24  26  28  32  36  37  37

.TONIGHT...

Sky/weather.........Mostly cloudy (80-90 percent). Showers and
                    chance of thunderstorms. Patchy smoke early in
                    the evening.
Min temperature.....Around 62.
Max humidity........100 percent.
Eye level winds.....Northeast winds up to 7 mph in the evening and
                    overnight becoming light.
Wind (30 ft)........Northeast winds 6 to 11 mph in the evening and
                    overnight becoming light.
Wind (20 ft)........Northeast winds 5 to 10 mph in the evening and
                    overnight becoming light. Gusty and erratic
                    winds expected near thunderstorms.
Mixing height.......500 ft AGL.
Transport winds.....Northeast 9 to 18 mph.
Smoke dispersal.....Good (34300 knot-ft) early in the evening
                    decreasing to poor (6400 knot-ft) late in the
                    night.
GFDI................0.

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........79  76  69  81  79  96  83  82  90  88  93  88
Weather cov.....CHC CHC CHC CHC DEF LKY LKY DEF DEF LKY CHC DEF
Weather type....RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW
Tstm cov........CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC
Temp............76  74  70  68  67  66  65  65  64  63  63  63
RH..............69  71  81  84  87  90  93  93  93  97  100 97
20 ft wind dir..N   N   N   N   N   NE  NE  NE  NE  N   NE  NE
20 ft wind spd..9   9   9   8   6   6   5   5   4   4   4   4
20 ft wind gust.14  14  13  12  10  10  7   6   6   6   6   6
Eye lvl wnd dir.N   N   N   N   N   NE  NE  NE  NE  N   NE  NE
Eye lvl wnd spd.7   7   7   6   4   4   4   4   3   3   3   3
Eye lvl wnd gst.11  10  10  9   8   7   5   5   5   4   5   5
30 ft wnd dir...N   N   N   N   N   NE  NE  NE  NE  N   NE  NE
30 ft wnd spd...11  11  11  10  8   8   6   6   5   5   5   5
30 ft wnd gst...18  17  16  15  13  12  9   8   8   7   8   8
Mix hgt (kft)...2.3 1.9 1.3 0.6 1.1 0.8 0.6 1.1 0.8 0.5 0.9 0.6
Transp wind dir.N   N   NE  NE  NE  NE  NE  NE  NE  NE  NE  NE
Transp wind spd.16  18  15  14  14  14  14  13  12  10  10  9
GFDI............0   0   0   0   0   0   0   0   0   0   0   0
SDspl kt-ft/100034  30  25  18  13  12  12  12  11  9   8   6

$$
Forecaster...Nicolaisen
Requested by...Aric Ping
Type of request...PRESCRIBED
.TAG 2618952.0/OAX
.DELDT 08/04/26
.FormatterVersion 2.0.0
.EMAIL aric.ping@pottcounty-ia.gov