Right now
The most recent data we hold from NOAA arrived 2 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 1 July 2026 at 08:45 UTC. It is kept here as a record.
It is the 25th strongest of the 43 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 1 at 3:29AM CDT until July 1 at 3:45AM CDT by NWS Sioux Falls SD
Nearby, since 15 March 2026
- May 31, 2026 · score 58 · 3.8 km
- May 31, 2026 · score 43 · 12.5 km
- June 1, 2026 · score 40 · 16.8 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 71 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 71% |
| Coordinates | 43.5721, -97.4254 |
| Nearest City | Mitchell (51 km) |
| Impact Tier | minor |
| Timestamp | 2026-07-01T08:29:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.036f48ebc1cc5713c9a4aced3a64b2ae |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Jerauld, SD; Sanborn, SD; Lyon, IA; O'Brien, IA; Osceola, IA; Sioux, IA; Nobles, MN; Rock, MN; Lincoln, SD; Minnehaha, SD; Hanson, SD; Hutchinson, SD; Lake, SD; Lincoln, SD; McCook, SD; Miner, SD; Minnehaha, SD; Turner, SD and 1 more areas |
| Headline | Severe Thunderstorm Warning issued July 1 at 3:29AM CDT until July 1 at 3:45AM CDT by NWS Sioux Falls SD |
| Expires | 2026-07-01T03:45:00-05:00 |
| SenderName | NWS Sioux Falls SD |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.036f48ebc1cc5713c9a4aced3a64b2ae4fe7f66f.001.1","noaa_urn:oid:2.49.0.1.840.0.1f95a610fbb4e289f5fc8676b59b5572ff05a0cb.001.1","noaa_urn:oid:2.49.0.1.840.0.db4dce7be93f31de6f10a39b185af8851eefa65b.001.1","noaa_urn:oid:2.49.0.1.840.0.907f6a8f7d44625e3a61350c930f7c2a9c66503c.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 67 |
| Iem Unit | MPH |
| Iem City | 8 N Delmont |
| Iem County | Douglas |
| Iem State | SD |
| Iem Wfo | FSD |
| Iem Remark | Personal weather station report of 67 mph gust at 2:27 am CDT. |
| MergedSources | [{"id":"iem_G_43.500_-97.850_1782891720000","source":"iem","severity":"low","severityValue":25,"timestamp":1782891720000,"latitude":43.5,"longitude":-97.85},{"id":"iem_G_43.120_-98.070_1782889800000","source":"iem","severity":"low","severityValue":25,"timestamp":1782889800000,"latitude":43.12,"longitude":-98.07},{"id":"iem_G_43.380_-98.160_1782890820000","source":"iem","severity":"low","severityValue":25,"timestamp":1782890820000,"latitude":43.38,"longitude":-98.16}] |
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 8 March 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.
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