Right now
The most recent data we hold from NOAA arrived 5 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 10 July 2026 at 20:00 UTC. It is kept here as a record.
It is the 3rd strongest of the 30 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 9 July 2026. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued July 10 at 12:34AM CDT until July 10 at 2:57PM CDT by NWS Aberdeen SD
An estimated 45,730 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 9, 2026 · score 34 · 0.0 km
- June 4, 2026 · score 34 · 8.1 km
- July 2, 2026 · score 58 · 13.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 out of 100, at 82 % 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 | 82% |
| Coordinates | 44.6428, -96.9726 |
| Nearest City | Watertown (31 km) |
| Population Exposed | 45.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-10T05:34:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flood Warning_noaa_urn:oid:2.49.0.1.840.0.8be5c6c428b77ac7d20bce281bd381e1 |
Score Breakdown
Technical Details
| Event | Flood Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Hamlin, SD; Brookings, SD; Hamlin, SD |
| Headline | Flood Warning issued July 10 at 12:34AM CDT until July 10 at 2:57PM CDT by NWS Aberdeen SD |
| Expires | 2026-07-10T15:00:00-05:00 |
| SenderName | NWS Aberdeen SD |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.8be5c6c428b77ac7d20bce281bd381e100ea9f95.001.1","noaa_urn:oid:2.49.0.1.840.0.ecef610ee5eb5dda162ae4e93894eefadfc6c4e6.001.1"] |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.