930
FNUS73 KOAX 171322
FWSOAX

Spot Forecast for Reunion RX...Pottawattamie Conservation
National Weather Service Omaha/Valley NE
822 AM CDT Mon Aug 17 2026

Forecast is based on ignition time of 0800 CDT on August 17.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...

Fire danger will remain limited to nil over the next few days,
with a downright muggy/foggy morning ongoing near the Missouri
River in western Iowa. The calm winds that have helped it form
will transition to southwesterly winds through the morning,
increasing in speed during the afternoon hours to around 10 mph,
gusting to 20 mph. Mostly sunny conditions will help warm the
ground, and we`ve given a bit drier lean to the forecast with the
idea that we might dry and warm out a bit more than models
indicate. Winds begin dipping this evening with showers and storms
forming overnight, moving into the burn site close to 3 AM with
multiple rounds of rain, winds, and lightning that could last
through much of Tuesday morning. Overall rainfall amounts of at
least 0.5" are expected.

Strongest Possible 30 ft Wind Speeds on Day of Burn: 25 mph

Lowest Possible Relative Humidity on Day of Burn: 51%

.REST OF TODAY...

Sky/weather.........Mostly sunny (30-40 percent). Patchy fog early
                    in the morning.
Max temperature.....Around 83.
Min humidity........58 percent.
Eye level winds.....Light winds.
Wind (30 ft)........Light winds.
Wind (20 ft)........Light winds.
Mixing height.......3300 ft AGL.
Transport winds.....West 3 to 7 mph shifting to the southwest 6 to
                    8 mph in the afternoon.
Smoke dispersal.....Poor (1800 knot-ft) early in the morning
                    increasing to fair (23300 knot-ft) in the
                    afternoon.
GFDI................0.

TIME (CDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........63  60  30  18  16  24  19  11  9   9
Weather cov.....PTY PTY
Weather type....FOG FOG
Tstm cov........
Temp............64  67  70  73  75  78  79  80  81  82
RH..............89  85  82  78  72  68  61  60  60  58
20 ft wind dir..W   N   W   SW  W   W   SW  SW  SW  S
20 ft wind spd..1   0   1   2   2   3   3   3   3   3
20 ft wind gust.2   2   4   5   6   6   7   7   7   7
Eye lvl wnd dir.W   N   W   SW  W   W   SW  SW  SW  S
Eye lvl wnd spd.1   0   1   1   1   2   2   2   2   2
Eye lvl wnd gst.2   2   3   4   4   5   5   5   5   5
30 ft wnd dir...W   N   W   SW  W   W   SW  SW  SW  S
30 ft wnd spd...1   0   1   3   3   4   4   4   4   4
30 ft wnd gst...3   3   5   6   7   8   9   9   9   9
Mix hgt (kft)...0.3 0.4 0.9 2.1 2.8 2.9 3.2 3.3 3.3 3.1
Transp wind dir.NW  W   W   W   W   W   W   SW  SW  SW
Transp wind spd.3   3   6   7   7   6   6   7   8   8
GFDI............0   0   0   0   0   0   0   0   0   0
SDspl kt-ft/10002   3   4   7   11  15  19  23  23  19

.TONIGHT...

Sky/weather.........Mostly clear (10-20 percent) then becoming
                    mostly cloudy (50-60 percent) then becoming
                    partly cloudy (40-50 percent) then becoming
                    mostly cloudy (50-60 percent) then becoming
                    partly cloudy (40-50 percent). Slight chance of
                    showers and thunderstorms after 3 am. Chance of
                    showers and thunderstorms early in the morning.
Min temperature.....Around 66.
Max humidity........100 percent.
Eye level winds.....Light winds.
Wind (30 ft)........Light winds.
Wind (20 ft)........Light winds. Gusty and erratic winds expected
                    near thunderstorms after 3 am.
Mixing height.......400 ft AGL.
Transport winds.....South 8 to 12 mph.
Smoke dispersal.....Poor (3500 knot-ft).
GFDI................0.

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........8   22  57  62  54  52  44  54  48  45  46  47
Weather cov.....                                    SCH SCH CHC
Weather type....                                    RW  RW  RW
Tstm cov........                                    SCH SCH CHC
Temp............81  80  78  75  73  72  71  70  69  69  69  68
RH..............63  68  69  74  80  86  86  92  95  96  98  100
20 ft wind dir..S   S   S   S   S   S   S   SW  S   S   S   S
20 ft wind spd..3   3   3   4   4   4   4   4   4   4   4   4
20 ft wind gust.7   6   6   7   8   8   7   7   7   7   7   7
Eye lvl wnd dir.S   S   S   S   S   S   S   SW  S   S   S   S
Eye lvl wnd spd.2   2   2   3   3   3   3   3   3   3   3   3
Eye lvl wnd gst.5   5   5   5   6   6   5   5   5   5   5   5
30 ft wnd dir...S   S   S   S   S   S   S   SW  S   S   S   S
30 ft wnd spd...4   4   4   5   5   5   5   5   5   5   5   5
30 ft wnd gst...9   8   8   9   10  10  9   9   9   9   9   9
Mix hgt (kft)...2.3 1.0 0.5 0.4 0.5 0.4 0.4 0.4 0.4 0.5 0.4 0.4
Transp wind dir.S   S   S   S   S   S   S   SW  S   S   SW  S
Transp wind spd.8   8   8   8   9   10  12  10  10  10  10  10
GFDI............0   0   0   0   0   0   0   0   0   0   0   0
SDspl kt-ft/100013  7   5   4   4   4   4   4   4   4   4   4

$$
Forecaster...Petersen
Requested by...Aric Ping
Type of request...PRESCRIBED
.TAG 2619834.0/OAX
.DELDT 08/17/26
.FormatterVersion 2.0.0
.EMAIL aric.ping@pottcounty-ia.gov