Suppression Forecast
Issued by NWS Omaha/Valley, NE
Issued by NWS Omaha/Valley, NE
829
FNUS73 KOAX 221125
FWSOAX
Spot Forecast for Little Sioux Unit Rx Fire...Iowa DNR
National Weather Service Omaha/Valley NE
625 AM CDT Tue Apr 22 2025
Forecast is based on ignition time of 1000 CDT on April 22.
If conditions become unrepresentative, contact the National Weather
Service.
.DISCUSSION...
Today will be warm with intermittent cloud cover, fairly light
winds, and rather dry air. The RH will drop into the 24-28
percent range by late afternoon. Winds will start the day out of
the north with occasional gusts up to 18 mph early. Winds become
lighter in the afternoon and turn out of the northeast by 1 PM and
out of the east by 5 PM. Expect deep mixing, but light winds by
afternoon.
Strongest Possible Wind Speeds on Day of Burn: A gust to 20 mph
possible before 10 AM. During the afternoon, strongest gust of
12-15 mph.
Lowest Possible Relative Humidity on Day of Burn: Lowest afternoon
RH is 20%.
.REST OF TODAY...
Sky/weather.........Sunny (15-25 percent).
Max temperature.....Around 73.
Min humidity........26 percent.
Eye level winds.....Northeast winds up to 6 mph shifting to the
around 4 mph late in the afternoon.
Surface winds (mph).Northeast winds 6 to 10 mph shifting to the
around 8 mph late in the afternoon.
Wind (20 ft)........North winds 5 to 9 mph shifting to the
northeast around 6 mph late in the afternoon.
Mixing height.......4500 ft AGL.
Transport winds.....North 8 to 17 mph shifting to the east 6 to 7
mph late in the afternoon.
Smoke dispersal.....Fair (20700 knot-ft) early in the morning
increasing to good (30800 knot-ft) in the
afternoon.
GFDI................1.
TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........27 31 25 21 12 10 10 12
Weather cov.....
Weather type....
Tstm cov........
Temp............57 60 63 66 69 70 71 72
RH..............62 53 44 38 32 30 27 26
20 FT wind dir..N N N N N N NE NE
20 FT wind spd..8 8 6 6 6 6 5 6
20 FT wind gust.14 13 11 10 8 8 7 7
Eye lvl wnd dir.N N N N N N NE NE
Eye lvl wnd spd.6 6 4 4 4 4 4 4
Eye lvl wnd gst.10 10 8 8 6 6 5 5
Surface wnd dir.N N N N N N NE NE
Surface wnd spd.10 10 8 8 8 8 6 8
Surface wnd gst.17 16 14 13 10 10 9 9
Mix hgt (kft)...1.8 2.1 2.7 3.3 4.0 4.3 4.5 4.5
Transp wind dir.N N N N N NE NE E
Transp wind spd.17 15 12 10 8 8 6 7
GFDI............1 1 1 1 1 1 1 1
SDspl kt-ft/100028 30 31 30 28 25 23 21
.TONIGHT...
Sky/weather.........Partly cloudy (20-30 percent). Slight chance of
rain showers overnight. Chance of rain showers
after 3 am.
Min temperature.....Around 49.
Max humidity........89 percent.
Eye level winds.....East winds around 4 mph early in the evening
becoming light, then becoming east around 4 mph
overnight becoming light.
Surface winds (mph).East winds 6 to 8 mph early in the evening
becoming light, then becoming east around 6 mph
overnight becoming light.
Wind (20 ft)........East winds around 5 mph early in the evening
becoming light, then becoming east around 5 mph
overnight becoming light.
Mixing height.......300 ft AGL.
Transport winds.....East 7 to 13 mph.
Smoke dispersal.....Fair (18700 knot-ft) early in the evening
decreasing to poor (1600 knot-ft) late in the
night.
GFDI................1.
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
Sky (%).........7 6 10 8 25 43
Weather cov..... S CHC CHANCE
Weather type....NONE NONE NONE NONE RNSHWR RNSHWR
Tstm cov........
Temp............72 67 59 56 54 51
RH..............27 36 51 59 69 83
20 ft wind......E 6 E 4 E 4 E 4 E 4 E 4
20 ft wind gust.7 6 6 6 6 6
Eye level wind..E 4 E 3 E 3 E 3 E 3 E 3
Eye lvl wnd gst.5 4 4 5 5 5
Surface wind....E 8 E 5 E 5 E 5 E 5 E 5
Surface wnd gst.9 7 7 8 8 8
Mix hgt (ft)....4100 400 300 300 400 400
Transport wind..E 7 E 7 E 10 E 12 E 12 SE 8
GFDI............1 1 0 0 0 0
SDspl kt-ft/100019 12 3 3 4 3
.WEDNESDAY...
Sky/weather.........Partly sunny (60-70 percent). Chance of rain
showers in the morning, then rain showers
likely and chance of thunderstorms in the
afternoon.
Max temperature.....Around 74.
Min humidity........53 percent.
Eye level winds.....Light winds becoming southeast up to 6 mph.
Surface winds (mph).Light winds becoming east 6 to 8 mph early in
the morning, then shifting to the southeast 8
to 10 mph in the afternoon.
Wind (20 ft)........Southeast winds 5 to 9 mph shifting to the east
5 to 7 mph early in the morning, then shifting
to the southeast 7 to 9 mph in the afternoon.
Gusty and erratic winds expected near
thunderstorms early in the afternoon. Gusty and
erratic winds expected near thunderstorms late
in the afternoon.
Mixing height.......4800 ft AGL.
Transport winds.....Southeast around 6 mph shifting to the
northeast 5 to 13 mph.
Smoke dispersal.....Poor (1000 knot-ft) early in the morning
increasing to good (48200 knot-ft) in the
afternoon.
GFDI................1.
TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
Sky (%).........51 62 60 68 74 71
Weather cov.....CHANCE CHANCE CHANCE CHANCE LIKELY LIKELY
Weather type....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR
Tstm cov........ S CHC CHANCE
Temp............51 52 61 66 70 72
RH..............86 89 72 64 55 53
20 ft wind......E 4 NE 5 E 6 E 6 SE 8 SE 8
20 ft wind gust.6 7 10 11 13 13
Eye level wind..E 3 NE 4 E 4 E 4 SE 6 SE 6
Eye lvl wnd gst.5 5 7 8 10 10
Surface wind....E 5 NE 6 E 8 E 8 SE 10 SE 10
Surface wnd gst.8 9 12 14 16 16
Mix hgt (ft)....300 400 1300 2500 4300 4400
Transport wind..SE 6 N 8 NE 9 NE 12 E 9 E 13
GFDI............0 0 1 1 1 1
SDspl kt-ft/10001 3 10 21 37 48
$$
Forecaster...Petersen
Requested by...Jeff Seago
Type of request...PRESCRIBED
.TAG 2511277.0/OAX
.DELDT 04/22/25
.FormatterVersion 2.0.0
.EMAIL jeffrey.seago@dnr.iowa.gov