This alert expired on 9 August 2026 at 08:15 UTC. It is kept here as a record.
No stronger detection stands among the 29 recorded within 20 km of this point since 15 March 2026 — 5 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 August 9 at 3:03AM CDT until August 9 at 3:15AM CDT by NWS Aberdeen SD
An estimated 28,102 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 31, 2026 · score 22 · 12.8 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 86 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 34 / 100 |
| Our confidence | 86% |
| Coordinates | 45.0960, -98.8380 |
| Nearest City | Aberdeen (49 km) |
| Population Exposed | 28.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-09T08:03:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Faulk, SD; Spink, SD |
| Headline | Severe Thunderstorm Warning issued August 9 at 3:03AM CDT until August 9 at 3:15AM CDT by NWS Aberdeen SD |
| Expires | 2026-08-09T03:15:00-05:00 |
| SenderName | NWS Aberdeen SD |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | Hosmer |
| Iem County | Edmunds |
| Iem State | SD |
| Iem Wfo | ABR |
| Iem Remark | Via FB. Time estimated. |
| MergedSources | [{"id":"iem_H_45.580_-99.470_1786258440000","source":"iem","severity":"low","severityValue":25,"timestamp":1786258440000,"latitude":45.58,"longitude":-99.47}] |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 34/100, near Aberdeen (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.