Hail & Wind Storms in Sioux City, IA — Latest Dates and Sizes
Hail and wind activity within ~25 miles of Sioux City, Iowa or recorded for its county: the last 12 months from NWS warnings, storm reports, and station measurements, plus official NOAA records back to 2010.
Latest hail and wind near Sioux City
- Last reported hail (0.75 in.+, screening): June 30, 2026 — 1.75 in. reported 12.3 mi SW of Sioux City (2 NW Homer, Nebraska), NWS Local Storm Report.
- Last wind gust 45 mph+ (screening): July 2, 2026 — 66 mph reported 22.3 mi E of Sioux City (Kingsley), NWS Local Storm Report.
- 2026 so far: 4 hail days and 11 wind days within 25 miles (days with a storm report or station gust at the screening thresholds; warnings alone never count).
| Date | Largest reported hail | Strongest gust |
|---|---|---|
| July 2, 2026 | — | 66 mph reported |
| July 1, 2026 | — | 65 mph reported |
| June 30, 2026 | 1.75 in. reported (Nebraska) | — |
| June 29, 2026 | 1.25 in. reported | — |
| May 25, 2026 | 0.75 in. reported (South Dakota) | — |
| May 18, 2026 | 1.50 in. reported (Nebraska) | — |
| May 17, 2026 | — | 58 mph measured |
| April 23, 2026 | — | 52 mph measured |
| March 15, 2026 | — | 58 mph measured |
| March 13, 2026 | — | 55 mph measured |
Was your address hit on July 2, 2026? Check any address free with the Free Report Snapshot — a YES/NO estimate at the screening thresholds.
Sioux City storm facts
- StormAuditor's analysis of NOAA and National Weather Service records found 136 wind and hail events, NWS warning products included, within 25 miles of Sioux City, Iowa (including the parts of Nebraska and South Dakota inside that circle) or recorded for Woodbury County in the 12 months ending October 7, 2026 (87 wind, 49 hail).
- The strongest gust within 25 miles of Sioux City in the last 12 months was 70 mph, measured at the Sioux City station (7.2 mi S of Sioux City) on December 10, 2025 (ASOS weather station; storm reports and station gusts only, warnings excluded).
- The largest hail reported within 25 miles of Sioux City in the last 12 months was 1.75 in., 12.3 mi SW of Sioux City (2 NW Homer, Nebraska) on June 30, 2026 (NWS Local Storm Report).
- The busiest day by event count near Sioux City was May 17, 2026, with 24 events.
- Woodbury County alone recorded 101 of those wind and hail events (61 wind, 40 hail); the Iowa page ranks counties by events of every type, floods and Special Weather Statements included.
Sioux City, Iowa storm history at a glance (last 12 months)
This free weather history for Sioux City — home to about 87,000 residents — draws on StormAuditor's consolidated public record: 136 wind and hail events within 25 miles of Sioux City (including the parts of Nebraska and South Dakota inside that circle) or recorded for Woodbury County in the trailing 12 months — 87 wind and 49 hail.
Events combine NWS warning products, observed Local Storm Reports, station measurements and official NCEI records in one event table. Because they include warnings, and wind covers thunderstorm and non-thunderstorm wind alike, they measure something different from the NCEI entry counts in the history section below; the two are not comparable year to year.
Busiest days near Sioux City by event count
Ranked by the number of 12-month events, NWS warnings included, so a day with many warnings can outrank a day with larger hail.
- May 17, 2026 — 24 events incl. warnings · 23 wind · 1 hail
- May 18, 2026 — 11 events incl. warnings · 1 wind · 10 hail
- May 15, 2026 — 11 events incl. warnings · 1 wind · 10 hail
- June 30, 2026 — 9 events incl. warnings · 3 wind · 6 hail
- January 21, 2026 — 8 events incl. warnings · 8 wind
How these numbers are counted
The storm numbers on this page are counted in four different ways, plus the free address check. Each answers a different question with its own size cutoffs, area and time span, so compare numbers within one group, not across groups.
- Storm days (latest hail and wind): A day in the last 12 months when at least one report within 25 miles of Sioux City showed hail 0.75 in. or larger or wind of 45 mph or more (StormAuditor screening thresholds). Reports are NWS storm reports from spotters, the public and officials, plus weather-station gusts, which count from 50 mph. A warning on its own never makes a storm day. The latest and largest hail, the latest and strongest gust, and the storm-day table all use this record. The 25-mile circle around Sioux City reaches into Nebraska and South Dakota. Values marked with another state's name come from there: they count for Sioux City but not on the Iowa state page, which counts reports inside Iowa only.
- Storm-date pages (NWS severe): A storm-date page is published only when at least one report or station gust within 25 miles of a city met the National Weather Service severe criteria (hail 1.00 in. or larger, or wind 58 mph or more), at least two separate observations were logged, and the day ranks among the most significant. A storm report that relays an airport weather station's reading (the same station, the same gust and the same time) counts once, as the station reading. Not every storm day gets a page; when one does, the page and the storm-day table show the same largest hail and strongest gust.
- Events (12-month counts): Events count NWS warnings, storm reports (wind 50 mph+, hail 0.75 in.+), station gusts (50 mph+) and NCEI entries within 25 miles of Sioux City or recorded for Woodbury County, tornado entries counted as wind. One event is one place on one day, counted separately for hail and for wind. A weather station or storm-report point counts once a day, at that day's highest reading, however many readings it filed; a place with hail and wind on the same day is two events. NWS warnings count once per county per day, and each NCEI entry once per place per day. A storm report that relays an airport weather station's reading (the same station, the same gust and the same time) counts once, as the station reading. The same report arriving through another feed (SPC or NCEI) is one record. Events measure how busy the area was, not whether a storm hit: one storm can bring warnings and reports from many places, so the busiest days by event count can differ from the storm days.
- NOAA history (since 2010): The official NOAA storm record (NCEI Storm Events) within 25 miles of Sioux City or in Woodbury County from January 1, 2010 to the day before the 12-month window starts: hail 0.50 in.+, thunderstorm wind 40 mph+ and tornadoes. It is a separate, older record with its own "storm days" (days with any entry), so its counts are not compared with the 12-month numbers.
- Free Report Snapshot: A free YES/NO estimate for one address, from radar and wind analysis at the property rather than area reports, at the same screening thresholds: hail 0.75 in. or wind 45 mph.
Full method: Methodology and Data Sources.
Sioux City hail and wind history in NOAA NCEI records, 2010–Oct. 2025
This section covers January 1, 2010 through October 6, 2025. Storms from October 7, 2025 on are in the 12-month summary above, so no date is counted in both.
The National Centers for Environmental Information logged 145 storm days within 25 miles of Sioux City or in Woodbury County in this period — 569 NCEI Storm Events entries in all. Thunderstorm wind outnumbers hail here: 293 wind reports against 252 hail reports.
June is the peak month for both hazards, with 34% of all hail reports. December through February accounts for 1 storm day.
The most storm days came in 2025 through Oct. 6, with 14; the fewest in a full year was 5, in 2017 and 2022. Across 2022–2024, the area averaged 9.3 storm days a year, above the 15-year average of 8.7.
On June 29, 2017, 4.25 in. (larger than grapefruit size) hail was reported in Dakota County, Nebraska — the largest in these records for this area. Hail of 2 inches or more appears in 4 different years of this record, the latest being 2025 through Oct. 6.
The strongest measured thunderstorm gust was 92 mph on June 11, 2010 in Union County, South Dakota. NCEI also lists 24 tornado entries for the area — one entry per county a tornado crossed.
- Average: 8.7 storm days a year (2010–2024)
- April and June: 59% of all hail reports
- Most hail reports in one year: 35 in 2011
- Hail of 1 in. or larger reported in 14 of 15 full years (2010–2024)
| Year | Hail reports | Thunderstorm wind reports | Tornado entries | Storm days | Largest hail | Strongest measured gust |
|---|---|---|---|---|---|---|
| 2010 | 7 | 26 | 0 | 10 | 1.25 in. | 92 mph |
| 2011 | 35 | 36 | 1 | 12 | 3.00 in. | 71 mph |
| 2012 | 26 | 11 | 0 | 8 | 1.75 in. | — |
| 2013 | 6 | 4 | 11 | 7 | 1.75 in. | — |
| 2014 | 30 | 28 | 2 | 9 | 1.75 in. | 68 mph |
| 2015 | 15 | 8 | 1 | 11 | 1.75 in. | 60 mph |
| 2016 | 18 | 23 | 1 | 10 | 1.75 in. | 84 mph |
| 2017 | 20 | 9 | 0 | 5 | 4.25 in. | 64 mph |
| 2018 | 7 | 4 | 0 | 6 | 1.75 in. | 60 mph |
| 2019 | 5 | 3 | 0 | 8 | 0.88 in. | — |
| 2020 | 13 | 15 | 0 | 9 | 1.75 in. | 67 mph |
| 2021 | 6 | 23 | 5 | 8 | 1.75 in. | 59 mph |
| 2022 | 8 | 19 | 1 | 5 | 1.75 in. | 79 mph |
| 2023 | 18 | 19 | 0 | 13 | 1.75 in. | 71 mph |
| 2024 | 17 | 34 | 2 | 10 | 2.00 in. | 72 mph |
| 2025 through Oct. 6 | 21 | 31 | 0 | 14 | 2.50 in. | 77 mph |
Download this history: CSV · JSON at https://www.stormauditor.com/downloads/storm-history/ia/sioux-city.json (free, open license, cite StormAuditor).
Source: NOAA NCEI Storm Events Database (thunderstorm wind, hail, and tornado entries; hail 0.50 in. or larger, wind 40 mph or more; wind converted from knots).
Sioux City storm history questions, 2010–Oct. 2025
How big did hail get in Sioux City, 2010–Oct. 2025?
4.25 in., larger than grapefruit size, reported on June 29, 2017 in Dakota County, Nebraska, per NCEI. Other years with hail of 2 inches or more: 2011, 2024 and 2025 through Oct. 6.
Which year had the most storm days near Sioux City, 2010–Oct. 2025?
2025 through Oct. 6, with 14 storm days (21 hail reports, 31 thunderstorm wind reports). The 15-year average is 8.7 storm days.
How many hail reports does Sioux City see in a typical year?
About 15 hail reports a year (2010–2024 average), with 1-inch or larger hail in 14 of 15 years. Thunderstorm wind averages 17 reports a year.
What month has the most hail near Sioux City?
June has the most hail reports (86, 2010–Oct. 2025), followed by April (62) and May (43).
What is the strongest measured thunderstorm gust near Sioux City, 2010–Oct. 2025?
92 mph, measured on June 11, 2010 in Union County, South Dakota. Only gusts NCEI lists as measured count here; gusts measured on a date and county with a tornado entry, and entries of 120 knots or more (known entry errors), are left out.
Sioux City hail map and wind map
Researching hail or wind in Sioux City? The Hail Explorer and Wind Explorer map radar-derived hail swaths and peak-gust wind swaths across Iowa, including the Sioux City metro: pick any storm date and see how estimated hail size and gust bands tracked through Woodbury County. Both explorers are included with Pro+ and Organization plans.
County-level activity is on the Impact Heatmap (free with an account), and day-by-day history is on the Storm Calendar (Pro plans and higher).
Free Sioux City weather report by address
Area maps show where storms tracked; an insurance claim or roof inspection turns on what happened at the property. Three ways to check one Sioux City address:
- The Free Report Snapshot answers YES/NO instantly on estimated wind of 45 mph or more and hail of 0.75 in. or larger (screening thresholds) at the address.
- The free Address Lookup lists NWS warnings, storm reports and NOAA observations near the address — free Sioux City wind history and free Sioux City hail history.
- A complete Weather Report for $2.99 covers every qualifying storm date at one address over the last 2 years.
All values are estimates from public NOAA data under our published methodology (see Limitations).
Storm professionals: restoration and exterior contractors, public adjusters, and crews and teams on one Organization plan work from this same public record — see StormAuditor for professionals.
Sources: NWS alerts (api.weather.gov) · NWS Local Storm Reports via the Iowa Environmental Mesonet · ASOS/AWOS station gusts via the Iowa Environmental Mesonet · NOAA NCEI Storm Events Database · every StormAuditor data source.
Free Sioux City storm data download
The Sioux City storm records for the last 12 months download free, free to reuse under the data license: download CSV · JSON at https://www.stormauditor.com/downloads/storm-data/ia/sioux-city.json.
- Coverage: every wind and hail record within about 25 miles of Sioux City (including the parts of Nebraska and South Dakota inside that circle) or recorded for Woodbury County, with dates, counties, event types, measured gusts and hail sizes.
- Rows: each source record before consolidation, including every NWS warning product and smaller storm reports, so the row count differs from the event counts above. The file holds Iowa records only; the counts above also include the neighboring-state records inside the 25-mile circle.
- Statewide files are on the Iowa storm data page.
Nearby city storm pages:
- Sioux Falls, SD hail & wind history
- Omaha, NE hail & wind history
- Bellevue, NE hail & wind history
- Ames hail & wind history
- Ankeny hail & wind history
- Des Moines hail & wind history
- Iowa statewide storm data
Guides for reading this data
Cite or link to this data — free
Free to quote, summarize, reuse, and link — for bloggers, journalists, researchers, contractors, and AI writing tools. No permission or credit required. A ready-made citation and link are below if they help. Terms: StormAuditor data & content license.
Citation: StormAuditor. "Sioux City, IA Hail & Wind Storm History." Updated September 11, 2026. https://www.stormauditor.com/storm-data/ia/sioux-city
HTML link: <a href="https://www.stormauditor.com/storm-data/ia/sioux-city">Sioux City, IA Hail & Wind Storm History — StormAuditor</a>
About this page: built by Storm Auditor LLC from public NOAA/NWS records — deduplicated warnings, storm reports, station measurements, and official records on a rolling 12-month window, under the published methodology. See the StormAuditor Editorial Team for how content is produced.
Data last refreshed October 7, 2026. Event counts cover wind and hail (warning products, and storm reports from 50 mph or 0.75 in.); flood activity and Special Weather Statements are not counted here.