Right now
The most recent data we hold from NOAA arrived 36 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 4 July 2026 at 23:45 UTC. It is kept here as a record.
No stronger detection stands among the 14 recorded within 20 km of this point since 15 March 2026 — 5 others scored the same. The last comparable one was on 23 June 2026. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 4 at 6:25PM CDT until July 4 at 6:45PM CDT by NWS Aberdeen SD
Urban PEI: 19,638 within a heuristic 50 km radius; not unique people.
How we know
2 recorded sources include NOAA; independence is not established by this count.
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 | 0.84/1 |
| Coordinates | 45.1766, -94.9940 |
| Nearest City | Willmar (7 km) |
| Urban exposure index (PEI) | 19.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T23:25:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.dad2c35e28f09d33465a6d6151082a30 |
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: 2026-07-04T23:25:00.000Z.
First archived: 2026-07-04T23:36:42.228Z. 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 | Big Stone, MN; Grant, SD; Wright, MN; Kandiyohi, MN; Meeker, MN |
| Headline | Severe Thunderstorm Warning issued July 4 at 6:25PM CDT until July 4 at 6:45PM CDT by NWS Aberdeen SD |
| Expires | 2026-07-04T18:45:00-05:00 |
| SenderName | NWS Aberdeen SD |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.dad2c35e28f09d33465a6d6151082a301a49e207.002.1","noaa_urn:oid:2.49.0.1.840.0.f68e7ea500af8a00bc3998c4f47545c208ab980a.001.1","noaa_urn:oid:2.49.0.1.840.0.1baccc6709ada8900338a16842747db5ff6937aa.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | Sauk Centre |
| Iem County | Stearns |
| Iem State | MN |
| Iem Wfo | MPX |
| Iem Remark | Quarter size hail measured in Sauk Centre. |
| MergedSources | [{"id":"iem_H_45.740_-94.960_1783198620000","source":"iem","severity":"low","severityValue":25,"timestamp":1783198620000,"latitude":45.74,"longitude":-94.96}] |
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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