Right now
The most recent data we hold from NOAA arrived 3 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 12 September 2026 at 21:00 UTC. It is kept here as a record.
It is the 4th strongest of the 48 detections recorded within 20 km of this point since 15 April 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 12 at 3:30PM CDT until September 12 at 4:00PM CDT by NWS Tulsa OK
Urban PEI: 72,227 within a heuristic 50 km radius; not unique people.
Nearby, since 15 April 2026
- June 30, 2026 · score 39 · 7.8 km
- June 29, 2026 · score 39 · 7.8 km
- June 15, 2026 · score 39 · 11.0 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 45 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) | 45 / 100 |
| Legacy data-support index | 0.84/1 |
| Coordinates | 37.0097, -94.9272 |
| Nearest City | Joplin (38 km) |
| Urban exposure index (PEI) | 72.2K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-09-12T20:30:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.e6d089e5510099c97a79fc4626d38d9da78d11a7.001.1 |
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: 2026-09-12T20:30:00.000Z.
First archived: 2026-09-12T20:32:54.527Z. 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 | Ottawa, OK; Cherokee, KS |
| Headline | Severe Thunderstorm Warning issued September 12 at 3:30PM CDT until September 12 at 4:00PM CDT by NWS Tulsa OK |
| Expires | 2026-09-12T16:00:00-05:00 |
| SenderName | NWS Tulsa OK |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e6d089e5510099c97a79fc4626d38d9da78d11a7.001.1","noaa_urn:oid:2.49.0.1.840.0.6b11e5e2e1a681e225a43b0ca445297b1c8c8602.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 100 |
| Spc Location | 1 WSW West Mineral |
| Spc County | Cherokee |
| Spc State | KS |
| Spc Comments | Time estimated from radar. (SGF) |
| MergedSources | [{"id":"spc_hail_37.55_-95.22_18","source":"spc","severity":"high","severityValue":65,"timestamp":1789238760000,"latitude":37.55,"longitude":-95.22},{"id":"spc_hail_37.28_-94.93_19","source":"spc","severity":"high","severityValue":65,"timestamp":1789242600000,"latitude":37.28,"longitude":-94.93}] |
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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