Reported by SPC today.
It is the 11th strongest of the 48 detections recorded within 20 km of this point since 17 May 2026. Another comparable one was recorded here earlier the same day.
What the source measured
SPC reported: Wind 81 kt near 9 NNE Hawarden, Sioux, IA. Measured by personal weather station. (FSD)
Nearby, since 17 May 2026
- July 2, 2026 · score 22 · 9.1 km
- August 11, 2026 · score 43 · 16.8 km
- June 28, 2026 · score 43 · 18.7 km
How we know
Confirmed by 2 independent sources, including SPC.
Our own score for this event is 28 out of 100, at 66 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | high |
| Calamity Score (ours) | 28 / 100 |
| Our confidence | 66% |
| Coordinates | 43.1200, -96.4300 |
| Nearest City | Sioux Falls (53 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-02T02:50:00.000Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | wind |
| Speed | 81 |
| Location | 9 NNE Hawarden |
| County | Sioux |
| State | IA |
| Comments | Measured by personal weather station. (FSD) |
| Iem TypeSummary | G |
| Iem Magnitude | 81 |
| Iem Unit | MPH |
| Iem City | 9 NNE Hawarden |
| Iem County | Sioux |
| Iem State | IA |
| Iem Wfo | FSD |
| Iem Remark | Measured by personal weather station. |
| MergedSources | [{"id":"iem_G_43.120_-96.430_1788317400000","source":"iem","severity":"low","severityValue":25,"timestamp":1788317400000,"latitude":43.12,"longitude":-96.43}] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 10 February 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 28/100 (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.