Right now
The most recent data we hold from NOAA arrived 6 hours 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 10 June 2026 at 01:04 UTC. It is kept here as a record.
It is the 84th strongest of the 96 detections recorded within 20 km of this point since 5 June 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 9 at 6:55PM MDT until June 9 at 7:00PM MDT by NWS Rapid City SD
Nearby, since 5 June 2026
- July 5, 2026 · score 22 · 17.1 km
- June 28, 2026 · score 22 · 17.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 16 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) | 16 / 100 |
| Legacy data-support index | 0.60/1 |
| Coordinates | 42.8971, -101.5228 |
| Nearest City | Rapid City (190 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-10T00:55:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.3b551ffd2998f065de504c52ba98dd7e |
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: 2026-06-10T00:55:00.000Z.
First archived: 2026-06-10T00:56:31.094Z. 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 | Haakon, SD; Cherry, NE; Bennett, SD; Jackson, SD; Mellette, SD; Todd, SD and 2 more areas |
| Headline | Severe Thunderstorm Warning issued June 9 at 6:55PM MDT until June 9 at 7:00PM MDT by NWS Rapid City SD |
| Expires | 2026-06-09T19:04:00-06:00 |
| SenderName | NWS Rapid City SD |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.3b551ffd2998f065de504c52ba98dd7e73cd5c1c.001.1","noaa_urn:oid:2.49.0.1.840.0.50f7583794253a783a1218654380bfea6f34f308.002.1","noaa_urn:oid:2.49.0.1.840.0.0dbc2acf3fc85845d4473ea8d26e96623132e15b.001.1","noaa_urn:oid:2.49.0.1.840.0.53f314b712bbe7954b83208ec28981ab870256d7.002.1","noaa_urn:oid:2.49.0.1.840.0.83777a1e558a4a05b8adaa596e4252021d93164f.001.1"] |
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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