Right now
The most recent data we hold from NOAA arrived 28 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
One other detection within 20 km in the last 24 hours, 17 km from here.
This alert expired on 29 June 2026 at 09:30 UTC. It is kept here as a record.
No stronger detection stands among the 57 recorded within 20 km of this point since 15 March 2026 — 7 others scored the same. The last comparable one was on 28 June 2026. 11 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 29 at 3:52AM CDT until June 29 at 4:30AM CDT by NWS Aberdeen SD
Nearby, since 15 March 2026
- June 10, 2026 · score 16 · 17.9 km
How we know
5 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 | 0.70/1 |
| Coordinates | 43.5589, -101.0847 |
| Nearest City | Rapid City (182 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-29T08:52:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.6655e2a71be95962347dce444e14dd84 |
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: 2026-06-29T08:52:00.000Z.
First archived: 2026-06-29T09:02:09.122Z. 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; Stanley, SD; Bennett, SD; Jackson, SD; Mellette, SD; Todd, SD |
| Headline | Severe Thunderstorm Warning issued June 29 at 3:52AM CDT until June 29 at 4:30AM CDT by NWS Aberdeen SD |
| Expires | 2026-06-29T04:30:00-05:00 |
| SenderName | NWS Aberdeen SD |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6655e2a71be95962347dce444e14dd8431bd78eb.001.1","noaa_urn:oid:2.49.0.1.840.0.067ea5562aa946f5f4f0e63693c5bb6b9bca1612.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 0.75 |
| Iem Unit | inch |
| Iem City | 1 ESE Cedar Pass |
| Iem County | Jackson |
| Iem State | SD |
| Iem Wfo | UNR |
| Iem Remark | Public report via mPING, submitted on the leading edge of the storm core. |
| MergedSources | [{"id":"iem_G_43.200_-101.650_1782720900000","source":"iem","severity":"low","severityValue":25,"timestamp":1782720900000,"latitude":43.2,"longitude":-101.65},{"id":"iem_G_43.200_-101.650_1782720600000","source":"iem","severity":"low","severityValue":25,"timestamp":1782720600000,"latitude":43.2,"longitude":-101.65},{"id":"iem_G_43.260_-101.610_1782720960000","source":"iem","severity":"low","severityValue":25,"timestamp":1782720960000,"latitude":43.26,"longitude":-101.61},{"id":"iem_H_43.750_-101.940_1782707640000","source":"iem","severity":"low","severityValue":25,"timestamp":1782707640000,"latitude":43.75,"longitude":-101.94}] |
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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