River Sioux, IA Live Doppler Radar
Live radar for River Sioux, Harrison County: every NWS radar combined, rain, snow and ice colors, flash-flood risk, storm tracks and official warnings.
What weather hits River Sioux?
Since 1996, the National Weather Service has logged damaging thunderstorm winds on 97 days in the Harrison forecast zone and Harrison County — the most common reported hazard around River Sioux, mostly in June and July. Next come heavy snow & winter storms (58 days) and extreme cold & wind chill (49 days).
| Hazard | Days reported | Most recent | Worst on record |
|---|---|---|---|
| Damaging thunderstorm winds | 97 | May 2026 | Aug 4, 1996 · $350,000 damage |
| Heavy snow & winter storms | 58 | Feb 2026 | Oct 25, 1997 · $900,000 damage |
| Extreme cold & wind chill | 49 | Jan 2026 | — |
| High winds | 24 | Mar 2026 | — |
| Excessive heat | 20 | Jun 2026 | — |
| Flooding | 19 | Jul 2024 | Jun 21, 1996 · $32 million damage |
| Blizzards | 14 | Mar 2025 | — |
| Flash flooding | 10 | Jun 2024 | May 5, 2007 · $15 million damage |
Source: NOAA NCEI Storm Events Database, 1996–2026 (the latest year is partial). A "day" is a date with at least one report in the Harrison forecast zone and Harrison County; damage is as reported, not adjusted for inflation.
How much snow does River Sioux get?
A normal year brings about 46 inches of snow to River Sioux, based on NOAA's 1991–2020 climate normals for the Little Sioux 2 Nw weather station 1.7 miles away. The snowiest month is usually February (13.4 in).
| Oct | Nov | Dec | Jan | Feb | Mar | Apr | May |
|---|---|---|---|---|---|---|---|
| 1.0 | 2.3 | 9.8 | 10.0 | 13.4 | 6.9 | 1.9 | 0.3 |
Normal snowfall in inches. TALON Pro compares this season's snow at your location with these normals as winter goes on.
Which radars cover River Sioux?
The closest NEXRAD Doppler radar is KOAX (Omaha, NE), about 37 miles south-southwest. Radar beams climb as they travel, so the height of the lowest scan over town decides how low in a storm the radar can see.
| Radar | Distance | Lowest beam over River Sioux | View |
|---|---|---|---|
| KOAX Omaha, NE | 37 mi south-southwest | 2,400 ft | Excellent — the lowest scan sees close to the ground |
| KDMX Des Moines, IA | 120 mi east | 12,700 ft | Limited — the beam overshoots the lowest part of storms |
| KFSD Sioux Falls, SD | 128 mi north-northwest | 14,100 ft | Limited — the beam overshoots the lowest part of storms |
Beam height is the center of the 0.5° scan above the radar, with standard refraction. Mountains near a radar can block it further.
Tornado & hail history near River Sioux
Since 1950, NOAA has recorded 86 tornadoes within 25 miles of River Sioux, 21 of them EF2/F2 or stronger. Most came in May and June. The strongest was an F4 on July 15, 1950, which passed about 20 miles west-southwest of town. The most recent was an EF0 on June 12, 2024, which touched down about 17 miles northwest of town.
Hail: 346 reports of 1-inch or larger hail within 25 miles since 1955, 50 of them 2 inches or more; the largest was 4.75-inch hail on June 3, 2014.
Source: NOAA Storm Prediction Center — tornadoes 1950–2025, hail 1955–2025. Distances are to each tornado's track; ratings before February 2007 use the original Fujita scale.
On TALON you get River Sioux's live radar loop, rain/snow/ice colors, flash-flood risk, storm tracks with arrival times and NWS warnings free; close-up radar and rotation detection are part of TALON Pro.
River Sioux radar FAQ
Where is the nearest weather radar to River Sioux, IA?
KOAX (Omaha, NE), about 37 miles south-southwest. KDMX (Des Moines, IA) is 120 miles away and also covers the area.
Does radar show snow in River Sioux?
Yes. TALON colors snow blue, a rain–snow mix pink and freezing rain purple using NOAA's precipitation-type analysis. Over River Sioux the lowest scan from KOAX is about 2,400 ft up.
Is TALON's radar for River Sioux free?
Yes — the US radar loop, rain/snow/ice colors, flash-flood risk, storm tracks and NWS warnings are free in any browser. Close-up radar, rotation detection and longer forecasts are part of TALON Pro.
Should I rely on radar for my safety?
No app replaces official warnings. When the National Weather Service issues a warning for River Sioux, follow it right away — see watch vs. warning.
Radar for nearby towns
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