Right now
The most recent data we hold from NOAA arrived 59 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 20 June 2026 at 00:15 UTC. It is kept here as a record.
No stronger detection stands among the 13 recorded within 20 km of this point since 15 March 2026 — one other scored the same. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 19 at 6:25PM CDT until June 19 at 7:15PM CDT by NWS La Crosse WI
Urban PEI: 84,083 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- June 19, 2026 · score 39 · 13.7 km
How we know
4 recorded sources include NOAA; independence is not established by this count.
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 | 0.89/1 |
| Coordinates | 45.0767, -91.9588 |
| Nearest City | Menomonie (22 km) |
| Urban exposure index (PEI) | 84.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-19T23:25:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.36ee2fb23bd5f53b62143ca03545127e |
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: 2026-06-19T23:25:00.000Z.
First archived: 2026-06-19T23:30:50.679Z. 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 | Clark, WI; Polk, WI; Barron, WI; Polk, WI and 2 more areas |
| Headline | Severe Thunderstorm Warning issued June 19 at 6:25PM CDT until June 19 at 7:15PM CDT by NWS La Crosse WI |
| Expires | 2026-06-19T19:15:00-05:00 |
| SenderName | NWS La Crosse WI |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.36ee2fb23bd5f53b62143ca03545127e4ab35e40.001.1","noaa_urn:oid:2.49.0.1.840.0.c8d0e38695f0afd231b704ff267840735c51b936.002.1","noaa_urn:oid:2.49.0.1.840.0.9fa1b25bda2b9f5375eb35b87a8754c47a62d1be.001.1","noaa_urn:oid:2.49.0.1.840.0.583fdca61d8c024e7ff872117bebfbc67cc4e9ec.001.1","noaa_urn:oid:2.49.0.1.840.0.683cf2197afb66ad9ab1564b96056a8d53f8b5aa.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 0.75 |
| Iem Unit | Inch |
| Iem City | Eau Claire |
| Iem County | Eau Claire |
| Iem State | WI |
| Iem Wfo | MPX |
| MergedSources | [{"id":"iem_H_45.390_-92.750_1781908980000","source":"iem","severity":"low","severityValue":25,"timestamp":1781908980000,"latitude":45.39,"longitude":-92.75},{"id":"iem_H_44.920_-92.740_1781910240000","source":"iem","severity":"low","severityValue":25,"timestamp":1781910240000,"latitude":44.92,"longitude":-92.74},{"id":"iem_H_44.760_-91.460_1781909640000","source":"iem","severity":"low","severityValue":25,"timestamp":1781909640000,"latitude":44.76,"longitude":-91.46}] |
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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