Right now
The most recent data we hold from NOAA arrived 75 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 7 September 2026 at 02:00 UTC. It is kept here as a record.
No stronger detection stands among the 81 recorded within 20 km of this point since 15 March 2026 — 5 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 6 at 8:08PM CDT until September 6 at 9:00PM CDT by NWS Kansas City/Pleasant Hill MO
Urban PEI: 1,655,805 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- July 9, 2026 · 5.1 km
- July 16, 2026 · 11.0 km
- September 16, 2026 · 11.3 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 58 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 v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | High |
| Calamity Score (ours) | 58 / 100 |
| Legacy data-support index | 0.85/1 |
| Coordinates | 38.9316, -94.3631 |
| Nearest City | Lee's Summit (3 km) |
| Urban exposure index (PEI) | 1.7M within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-09-07T01:08:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.09a676728fbc3c4ac091dbe505c5a95ab08b2597.001.1 |
Physical priority index · v4 (historical). 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: 2026-09-07T01:08:00.000Z.
First archived: 2026-09-07T01:12:19.955Z. 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 | Johnson, KS; Cass, MO; Clay, MO; Jackson, MO; Buchanan, MO; Clinton, MO; DeKalb, MO; Cedar, MO; St. Clair, MO; Vernon, MO |
| Headline | Severe Thunderstorm Warning issued September 6 at 8:08PM CDT until September 6 at 9:00PM CDT by NWS Kansas City/Pleasant Hill MO |
| Expires | 2026-09-06T21:00:00-05:00 |
| SenderName | NWS Kansas City/Pleasant Hill MO |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.09a676728fbc3c4ac091dbe505c5a95ab08b2597.001.1","noaa_urn:oid:2.49.0.1.840.0.cf0e72038fc5e141473a7371921366627eb8abb2.002.1","noaa_urn:oid:2.49.0.1.840.0.f58a23331e68575ef26d00e8e7f12731eb34421a.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 100 |
| Spc Location | 2 SE Bonner Springs |
| Spc County | Johnson |
| Spc State | KS |
| Spc Comments | Report from mPING: Quarter (1.00 in.). (EAX) |
| MergedSources | [{"id":"spc_wind_39.30_-95.00_88","source":"spc","severity":"medium","severityValue":45,"timestamp":1788739440000,"latitude":39.3,"longitude":-95},{"id":"spc_hail_39.04_-94.86_108","source":"spc","severity":"high","severityValue":65,"timestamp":1788743754514,"latitude":39.04,"longitude":-94.86}] |
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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