Right now
The most recent data we hold from NOAA arrived 11 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 19 June 2026 at 02:51 UTC. It is kept here as a record.
No stronger detection stands among the 16 recorded within 20 km of this point since 4 April 2026 — 7 others scored the same. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 18 at 8:41PM MDT until June 18 at 8:45PM MDT by NWS Rapid City SD
How we know
8 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 | 44.9600, -102.3787 |
| Nearest City | Rapid City (119 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Date | 2026-06-19 — time not reported by the source |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.c0f61752f9270e6d2ba1cad61bfaac2acb1f4896.001.1 |
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: 2026-06-19 — time not reported.
First archived: 2026-06-19T02:42:05.813Z. 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 | Meade, SD; Perkins, SD; Ziebach, SD |
| Headline | Severe Thunderstorm Warning issued June 18 at 8:41PM MDT until June 18 at 8:45PM MDT by NWS Rapid City SD |
| Expires | 2026-06-18T20:51:00-06:00 |
| SenderName | NWS Rapid City SD |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 59 |
| Iem Unit | mph |
| Iem City | 8 SE Mud Butte |
| Iem County | Meade |
| Iem State | SD |
| Iem Wfo | UNR |
| MergedSources | [{"id":"iem_G_45.010_-102.860_1781834520000","source":"iem","severity":"low","severityValue":25,"timestamp":1781834520000,"latitude":45.01,"longitude":-102.86},{"id":"iem_G_45.260_-102.320_1781835600000","source":"iem","severity":"low","severityValue":25,"timestamp":1781835600000,"latitude":45.26,"longitude":-102.32},{"id":"iem_G_45.010_-102.860_1781833920000","source":"iem","severity":"low","severityValue":25,"timestamp":1781833920000,"latitude":45.01,"longitude":-102.86},{"id":"iem_G_45.010_-102.860_1781832840000","source":"iem","severity":"low","severityValue":25,"timestamp":1781832840000,"latitude":45.01,"longitude":-102.86},{"id":"iem_G_45.010_-102.860_1781833140000","source":"iem","severity":"low","severityValue":25,"timestamp":1781833140000,"latitude":45.01,"longitude":-102.86},{"id":"iem_G_44.920_-102.750_1781833500000","source":"iem","severity":"low","severityValue":25,"timestamp":1781833500000,"latitude":44.92,"longitude":-102.75},{"id":"iem_G_44.920_-102.750_1781833800000","source":"iem","severity":"low","severityValue":25,"timestamp":1781833800000,"latitude":44.92,"longitude":-102.75}] |
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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens in this area?