Right now
The most recent data we hold from NOAA arrived 7 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 11 June 2026 at 00:15 UTC. It is kept here as a record.
It is the 16th strongest of the 42 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 10 at 6:37PM CDT until June 10 at 7:15PM CDT by NWS Twin Cities/Chanhassen MN
Urban PEI: 94,872 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- June 5, 2026 · score 34 · 8.9 km
- June 10, 2026 · score 58 · 12.3 km
- June 20, 2026 · score 39 · 14.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 32 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) | 32 / 100 |
| Legacy data-support index | 0.79/1 |
| Coordinates | 44.3845, -91.6762 |
| Nearest City | Winona (37 km) |
| Urban exposure index (PEI) | 94.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-10T23:37:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.6367a894899f3a846cf93beb52248f96 |
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: 2026-06-10T23:37:00.000Z.
First archived: 2026-06-10T23:45:15.657Z. 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 | Barron, WI; Polk, WI; La Crosse, WI; Fillmore, MN; Houston, MN |
| Headline | Severe Thunderstorm Warning issued June 10 at 6:37PM CDT until June 10 at 7:15PM CDT by NWS Twin Cities/Chanhassen MN |
| Expires | 2026-06-10T19:15:00-05:00 |
| SenderName | NWS Twin Cities/Chanhassen MN |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6367a894899f3a846cf93beb52248f96d9b328c0.001.1","noaa_urn:oid:2.49.0.1.840.0.d63ddde2dad3388130393027e9fe1d3f1d072b32.002.1","noaa_urn:oid:2.49.0.1.840.0.3191f8e69bedb71b4e24b1d4e4c047ee38168573.001.1"] |
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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