Right now
The most recent data we hold from NOAA arrived 2 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 3 July 2026 at 02:05 UTC. It is kept here as a record.
No stronger detection stands among the 19 recorded within 20 km of this point since 22 March 2026 — 7 others scored the same. The last comparable one was on 2 July 2026. 10 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued July 2 at 8:55PM CDT until July 2 at 9:00PM CDT by NWS Aberdeen SD
Nearby, since 22 March 2026
- July 31, 2026 · score 22 · 11.4 km
How we know
4 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 | 0.68/1 |
| Coordinates | 44.1718, -99.8864 |
| Nearest City | Mitchell (157 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-07-03T01:55:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.35b72f307fb2ef1364b1dabd92601eb94af7693d.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: 2026-07-03T01:55:00.000Z.
First archived: 2026-07-03T01:59:10.285Z. 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 | Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Buffalo, SD; Hughes, SD; Hyde, SD; Lyman, SD; Stanley, SD |
| Headline | Flood Warning issued July 2 at 8:55PM CDT until July 2 at 9:00PM CDT by NWS Aberdeen SD |
| Expires | 2026-07-02T21:05:00-05:00 |
| SenderName | NWS Aberdeen SD |
| HasExactCoords | true |
| Iem TypeSummary | E |
| Iem City | 7 SE Rosseau |
| Iem County | Stanley |
| Iem State | SD |
| Iem Wfo | ABR |
| Iem Remark | LaRoche Creek out of banks. |
| MergedSources | [{"id":"iem_E_44.250_-100.110_1783023420000","source":"iem","severity":"low","severityValue":25,"timestamp":1783023420000,"latitude":44.25,"longitude":-100.11},{"id":"iem_E_44.210_-99.990_1783023420000","source":"iem","severity":"low","severityValue":25,"timestamp":1783023420000,"latitude":44.21,"longitude":-99.99},{"id":"iem_E_44.250_-99.960_1783023420000","source":"iem","severity":"low","severityValue":25,"timestamp":1783023420000,"latitude":44.25,"longitude":-99.96}] |
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.
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