Right now
The most recent data we hold from NOAA arrived 4 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 7 July 2026 at 05:15 UTC. It is kept here as a record.
It is the 2nd strongest of the 17 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 6 at 11:49PM CDT until July 7 at 12:15AM CDT by NWS Aberdeen SD
An estimated 22,073 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 8, 2026 · score 34 · 21.1 km
- June 10, 2026 · score 58 · 23.6 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 92 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 34 / 100 |
| Our confidence | 92% |
| Coordinates | 45.0133, -96.8167 |
| Nearest City | Watertown (27 km) |
| Population Exposed | 22.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-07T04:49:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.4178b07da10006f6c7bc1e7354f191391e660903.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Codington, SD; Deuel, SD; Grant, SD |
| Headline | Severe Thunderstorm Warning issued July 6 at 11:49PM CDT until July 7 at 12:15AM CDT by NWS Aberdeen SD |
| Expires | 2026-07-07T00:15:00-05:00 |
| SenderName | NWS Aberdeen SD |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 60 |
| Iem Unit | MPH |
| Iem City | 8.1 ESE Bonanza Grove |
| Iem County | Big Stone |
| Iem State | MN |
| Iem Wfo | ABR |
| Iem Remark | Personal Weather Station KMNCLINT4. |
| MergedSources | [{"id":"iem_H_45.220_-96.770_1783397520000","source":"iem","severity":"low","severityValue":25,"timestamp":1783397520000,"latitude":45.22,"longitude":-96.77},{"id":"iem_G_44.930_-97.120_1783399800000","source":"iem","severity":"low","severityValue":25,"timestamp":1783399800000,"latitude":44.93,"longitude":-97.12},{"id":"iem_G_45.400_-96.560_1783395120000","source":"iem","severity":"low","severityValue":25,"timestamp":1783395120000,"latitude":45.4,"longitude":-96.56},{"id":"iem_G_45.400_-96.560_1783396920000","source":"iem","severity":"low","severityValue":25,"timestamp":1783396920000,"latitude":45.4,"longitude":-96.56}] |
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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