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 29 June 2026 at 11:47 UTC. It is kept here as a record.
It is the 3rd strongest of the 37 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 29 at 6:37AM CDT until June 29 at 6:45AM CDT by NWS Aberdeen SD
Nearby, since 15 March 2026
- August 13, 2026 · score 22 · 19.2 km
How we know
6 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 | 44.6258, -99.2681 |
| Nearest City | Aberdeen (111 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-29T11:37:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.4e01681db3508d72f094c33aa80dfd57 |
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: 2026-06-29T11:37:00.000Z.
First archived: 2026-06-29T11:45:13.303Z. 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 | Buffalo, SD; Hand, SD; Hyde, SD; Faulk, SD; Hand, SD; Hughes, SD; Hyde, SD; Hand, SD; Spink, SD and 1 more areas |
| Headline | Severe Thunderstorm Warning issued June 29 at 6:37AM CDT until June 29 at 6:45AM CDT by NWS Aberdeen SD |
| Expires | 2026-06-29T06:47:00-05:00 |
| SenderName | NWS Aberdeen SD |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4e01681db3508d72f094c33aa80dfd57077d576c.001.1","noaa_urn:oid:2.49.0.1.840.0.4b94f2e14fd9d2e095fcf697a37c2ec5eafea3b7.001.1","noaa_urn:oid:2.49.0.1.840.0.6da598c3aeba422eda276b40c5aae4b539c97243.001.1","noaa_urn:oid:2.49.0.1.840.0.3e365500d73e3f2c0d41ef24e5c28a1f68ce6907.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 71 |
| Iem Unit | MPH |
| Iem City | Highmore |
| Iem County | Hyde |
| Iem State | SD |
| Iem Wfo | ABR |
| Iem Remark | Peak wind gust on Ambient Weather station. |
| MergedSources | [{"id":"iem_G_44.530_-99.600_1782732000000","source":"iem","severity":"low","severityValue":25,"timestamp":1782732000000,"latitude":44.53,"longitude":-99.6},{"id":"iem_G_44.530_-99.460_1782732000000","source":"iem","severity":"low","severityValue":25,"timestamp":1782732000000,"latitude":44.53,"longitude":-99.46},{"id":"iem_G_44.510_-99.520_1782731700000","source":"iem","severity":"low","severityValue":25,"timestamp":1782731700000,"latitude":44.51,"longitude":-99.52},{"id":"iem_G_44.430_-99.440_1782731820000","source":"iem","severity":"low","severityValue":25,"timestamp":1782731820000,"latitude":44.43,"longitude":-99.44},{"id":"iem_G_44.520_-99.440_1782731940000","source":"iem","severity":"low","severityValue":25,"timestamp":1782731940000,"latitude":44.52,"longitude":-99.44}] |
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.
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