Right now
The most recent data we hold from NOAA arrived 3 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 5 July 2026 at 00:30 UTC. It is kept here as a record.
It is the 5th strongest of the 33 detections recorded within 20 km of this point since 3 June 2026. Another comparable one was recorded here earlier the same day. 14 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 4 at 6:57PM CDT until July 4 at 7:30PM CDT by NWS Aberdeen SD
Nearby, since 3 June 2026
- July 4, 2026 · score 22 · 18.9 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 64 % 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 | 64% |
| Coordinates | 44.2721, -99.3707 |
| Nearest City | Mitchell (124 km) |
| Impact Tier | minor |
| Timestamp | 2026-07-04T23:57:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.27c3d398bf943f9dd4593d8867c84193 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Lyman, SD; Hand, SD; Hyde, SD |
| Headline | Severe Thunderstorm Warning issued July 4 at 6:57PM CDT until July 4 at 7:30PM CDT by NWS Aberdeen SD |
| Expires | 2026-07-04T19:30:00-05:00 |
| SenderName | NWS Aberdeen SD |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.27c3d398bf943f9dd4593d8867c841938f287b05.001.1","noaa_urn:oid:2.49.0.1.840.0.faa54f2eb61630d6a6bdd8e7b12c7cba2d63df83.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 14 SSE Seneca |
| Iem County | Hyde |
| Iem State | SD |
| Iem Wfo | ABR |
| Iem Remark | still hailing at the time of report. |
| MergedSources | [{"id":"iem_H_44.870_-99.400_1783207920000","source":"iem","severity":"low","severityValue":25,"timestamp":1783207920000,"latitude":44.87,"longitude":-99.4}] |
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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