Right now
The most recent data we hold from NOAA arrived 5 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 29 June 2026 at 10:00 UTC. It is kept here as a record.
No stronger detection stands among the 21 recorded within 20 km of this point since 23 April 2026 — 9 others scored the same. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 29 at 4:44AM CDT until June 29 at 5:00AM CDT by NWS Aberdeen SD
Nearby, since 23 April 2026
- August 13, 2026 · score 22 · 7.4 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 22 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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 |
| Legacy data-support index | 0.66/1 |
| Coordinates | 43.8178, -100.4689 |
| Nearest City | Mitchell (196 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-29T09:44:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.d0647542f08346893a4733edaeb1dafe |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-06-29T09:44:00.000Z.
First archived: 2026-06-29T09:49:54.809Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Jones, SD; Lyman, SD; Mellette, SD; Todd, SD; Tripp, SD |
| Headline | Severe Thunderstorm Warning issued June 29 at 4:44AM CDT until June 29 at 5:00AM CDT by NWS Aberdeen SD |
| Expires | 2026-06-29T05:00:00-05:00 |
| SenderName | NWS Aberdeen SD |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d0647542f08346893a4733edaeb1dafe69d74169.001.1","noaa_urn:oid:2.49.0.1.840.0.4febd8807caaa457ed4c4e4bc42aa6b0ad7f232e.001.1","noaa_urn:oid:2.49.0.1.840.0.ca8911d6d8fe2cdd00f48c56196bd3be8f732efb.002.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1.5 |
| Iem Unit | Inch |
| Iem City | 3 W Okaton |
| Iem County | Jones |
| Iem State | SD |
| Iem Wfo | ABR |
| Iem Remark | Hail has dented vehicles. Largest hail was 1.5 inches. |
| MergedSources | [{"id":"iem_H_43.880_-100.950_1782723600000","source":"iem","severity":"low","severityValue":25,"timestamp":1782723600000,"latitude":43.88,"longitude":-100.95}] |
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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