Right now
The most recent data we hold from NOAA arrived 9 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 07:30 UTC. It is kept here as a record.
It is the 138th strongest of the 225 detections recorded within 20 km of this point since 17 May 2026. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 1 at 2:11AM CDT until July 1 at 2:30AM CDT by NWS Sioux Falls SD
Nearby, since 17 May 2026
- September 8, 2026 · score 46 · 15.9 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 66 % 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 | 66% |
| Coordinates | 42.9490, -98.2061 |
| Nearest City | Mitchell (86 km) |
| Impact Tier | minor |
| Timestamp | 2026-07-01T07:11:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.800414884c2d9e1a0d82708beb0e7258 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Charles Mix, SD; Douglas, SD; Gregory, SD; Tripp, SD; Cedar, NE; Knox, NE and 2 more areas |
| Headline | Severe Thunderstorm Warning issued July 1 at 2:11AM CDT until July 1 at 2:30AM CDT by NWS Sioux Falls SD |
| Expires | 2026-07-01T02:30:00-05:00 |
| SenderName | NWS Sioux Falls SD |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.800414884c2d9e1a0d82708beb0e7258967ad59b.001.1","noaa_urn:oid:2.49.0.1.840.0.064d32115e13b9b0069f89b83e97419c4b33aef3.001.1","noaa_urn:oid:2.49.0.1.840.0.1bebcc5afef1b9686b1fdb0a7cf4330f4eabbd6e.001.1","noaa_urn:oid:2.49.0.1.840.0.e7b504286cdced4dde8fb306faa389d8501a9999.001.1","noaa_urn:oid:2.49.0.1.840.0.84b1c9bf117b8c83c824d4b3dad00deb45ae941a.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 62 |
| Iem Unit | MPH |
| Iem City | 10 W Crofton |
| Iem County | Knox |
| Iem State | NE |
| Iem Wfo | OAX |
| Iem Remark | Nebraska Mesonet Station. |
| MergedSources | [{"id":"iem_G_42.750_-97.680_1782889080000","source":"iem","severity":"low","severityValue":25,"timestamp":1782889080000,"latitude":42.75,"longitude":-97.68}] |
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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