Right now
The most recent data we hold from NOAA arrived 4 hours 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 00:15 UTC. It is kept here as a record.
It is the 29th strongest of the 68 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 2 at 6:58PM CDT until July 2 at 7:15PM CDT by NWS Sioux Falls SD
Urban PEI: 23,657 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- June 8, 2026 · score 34 · 2.0 km
- June 7, 2026 · score 34 · 2.0 km
- July 12, 2026 · score 34 · 2.7 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.
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) | 34 / 100 |
| Legacy data-support index | 0.79/1 |
| Coordinates | 44.4476, -96.8709 |
| Nearest City | Brookings (16 km) |
| Urban exposure index (PEI) | 23.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-02T23:58:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.bb12b5e7f37c0c6083ef751504410517 |
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: 2026-07-02T23:58:00.000Z.
First archived: 2026-07-03T00:03:53.882Z. 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 | Hanson, SD; Hutchinson, SD; McCook, SD; Pipestone, MN; Lake, SD; Minnehaha, SD; Moody, SD; Codington, SD; Deuel, SD; Hamlin, SD and 2 more areas |
| Headline | Severe Thunderstorm Warning issued July 2 at 6:58PM CDT until July 2 at 7:15PM CDT by NWS Sioux Falls SD |
| Expires | 2026-07-02T19:15:00-05:00 |
| SenderName | NWS Sioux Falls SD |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.bb12b5e7f37c0c6083ef7515044105178c780598.001.1","noaa_urn:oid:2.49.0.1.840.0.a4fb886bef8396d705634f1386a231040ee4f781.001.1","noaa_urn:oid:2.49.0.1.840.0.96c27f3f7a81d661c1619556fae98baee1dbb377.001.1","noaa_urn:oid:2.49.0.1.840.0.9a65dd594df454a275e58849aa7a972c17aa4ae7.001.1","noaa_urn:oid:2.49.0.1.840.0.dd90379e6d811a22046fa38ad3f958cd35a5ab12.001.1"] |
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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