Right now
The most recent data we hold from NOAA arrived 46 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 19 June 2026 at 23:30 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 18 March 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 19 at 5:37PM CDT until June 19 at 6:30PM CDT by NWS Twin Cities/Chanhassen MN
Urban PEI: 50,498 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- June 19, 2026 · score 39 · 2.6 km
- June 19, 2026 · score 39 · 18.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 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) | 39 / 100 |
| Legacy data-support index | 0.78/1 |
| Coordinates | 45.0511, -92.3237 |
| Nearest City | River Falls (32 km) |
| Urban exposure index (PEI) | 50.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-19T22:37:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.76c6cbeec17ad2706e59d403657e0097 |
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: 2026-06-19T22:37:00.000Z.
First archived: 2026-06-19T22:48:55.773Z. 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 | Dunn, WI; Eau Claire, WI; Pepin, WI; Ramsey, MN; Washington, MN; Pierce, WI; St. Croix, WI; Chisago, MN; Polk, WI |
| Headline | Severe Thunderstorm Warning issued June 19 at 5:37PM CDT until June 19 at 6:30PM CDT by NWS Twin Cities/Chanhassen MN |
| Expires | 2026-06-19T18:30:00-05:00 |
| SenderName | NWS Twin Cities/Chanhassen MN |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.76c6cbeec17ad2706e59d403657e009742298ace.001.1","noaa_urn:oid:2.49.0.1.840.0.8d126e1a56566dbf1d8542fb2fefe48a2ebfdd66.001.1","noaa_urn:oid:2.49.0.1.840.0.02fa3fa2480920b150fdd5b0e1ccbf48f20350a7.001.1"] |
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.
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