Right now
The most recent data we hold from NOAA arrived 1 minute 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 23:30 UTC. It is kept here as a record.
It is the 43rd strongest of the 103 detections recorded within 20 km of this point since 17 March 2026. The last comparable one was on 1 June 2026. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 11 at 5:49PM CDT until June 11 at 6:30PM CDT by NWS St Louis MO
Urban PEI: 129,330 within a heuristic 50 km radius; not unique people.
Nearby, since 17 March 2026
- May 20, 2026 · score 43 · 16.4 km
- June 15, 2026 · score 43 · 16.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 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) | 37 / 100 |
| Legacy data-support index | 0.80/1 |
| Coordinates | 39.2699, -92.3386 |
| Nearest City | Columbia (36 km) |
| Urban exposure index (PEI) | 129.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-11T22:49:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.a034b6e461aef02f6588289e7e1db748 |
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: 2026-06-11T22:49:00.000Z.
First archived: 2026-06-11T22:50:57.917Z. 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 | Marion, MO; Monroe, MO; Ralls, MO; Mason, IL; Peoria, IL; Tazewell, IL; Howard, MO and 14 more areas |
| Headline | Severe Thunderstorm Warning issued June 11 at 5:49PM CDT until June 11 at 6:30PM CDT by NWS St Louis MO |
| Expires | 2026-06-11T18:30:00-05:00 |
| SenderName | NWS St Louis MO |
| HasExactCoords | true |
| MergedCount | 17 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a034b6e461aef02f6588289e7e1db74828fd52a1.002.1","noaa_urn:oid:2.49.0.1.840.0.8563e8e2a40e7d8f1b639c3bf4bb1fd7085afb7a.001.1","noaa_urn:oid:2.49.0.1.840.0.f12b051adfd65f6f7bdead87cb9a21d4f70ebb37.001.1","noaa_urn:oid:2.49.0.1.840.0.83b8508097c014bad6b95da5d5254df3f04f60ab.001.1","noaa_urn:oid:2.49.0.1.840.0.193b3defb1098f237c9ff9fa74b9ab1998658c66.001.1","noaa_urn:oid:2.49.0.1.840.0.84b9984640896ce1f86b78eb0045d9e35464898a.001.1","noaa_urn:oid:2.49.0.1.840.0.96d451c3ae93af8e6ad25844d8a8d72fdab5cfdf.002.1","noaa_urn:oid:2.49.0.1.840.0.5a0b16355d9426613b567d2db0477a56e805eb45.001.1","noaa_urn:oid:2.49.0.1.840.0.2998bb8585152e1cc699832757675f23bce806e7.002.1","noaa_urn:oid:2.49.0.1.840.0.097a6822295c493a8f5ff0adbe5e58f475b9d82d.001.1","noaa_urn:oid:2.49.0.1.840.0.b078ac64116d8a7516233a183103cbb15e1e0e6a.001.1","noaa_urn:oid:2.49.0.1.840.0.10d71e684f7eee623ab24f2d20f4b46d2470c5a2.001.1","noaa_urn:oid:2.49.0.1.840.0.799718c886cb20901bb8776ed473c5b96665f89a.001.1","noaa_urn:oid:2.49.0.1.840.0.3b8c80b1d6f652936dc63b9fbe11bfe753021ce3.001.1","noaa_urn:oid:2.49.0.1.840.0.c937bea68abb467ab2b164d89518d24b3902c672.001.1","noaa_urn:oid:2.49.0.1.840.0.8daa36906c6da4101aa120a8e0bd0b6ec7c92109.002.1","noaa_urn:oid:2.49.0.1.840.0.653033cb2a8a991c67166da223ec849834b4f30e.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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