Right now
The most recent data we hold from NOAA arrived 2 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
6 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert expired on 20 September 2026 at 01:04 UTC. It is kept here as a record.
It is the 71st strongest of the 94 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 19 at 7:55PM CDT until September 19 at 8:00PM CDT by NWS Topeka KS
Urban PEI: 76,780 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- June 7, 2026 · score 43 · 9.3 km
- June 5, 2026 · score 63 · 11.4 km
- September 20, 2026 · score 37 · 15.0 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
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 v5. 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 | 0.85/1 |
| Coordinates | 39.7536, -95.1550 |
| Nearest City | Saint Joseph (26 km) |
| Urban exposure index (PEI) | 76.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-20T00:55:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.b29d33b19811a666dd8b80e52374b85775f98163.001.1 |
Physical priority index · v5. 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: 2026-09-20T00:55:00.000Z.
First archived: 2026-09-20T00:58:01.754Z. 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 | Jackson, KS; Nemaha, KS; Pottawatomie, KS; Jackson, KS; Shawnee, KS; McPherson, KS and 6 more areas |
| Headline | Severe Thunderstorm Warning issued September 19 at 7:55PM CDT until September 19 at 8:00PM CDT by NWS Topeka KS |
| Expires | 2026-09-19T20:04:00-05:00 |
| SenderName | NWS Topeka KS |
| HasExactCoords | true |
| MergedCount | 10 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b29d33b19811a666dd8b80e52374b85775f98163.001.1","noaa_urn:oid:2.49.0.1.840.0.a6b0c1a96a6ee2d6595764c3cc90e12331387142.001.1","noaa_urn:oid:2.49.0.1.840.0.e526dbacd86b5d917ac1ec30342e7090c5b7ba4d.001.1","noaa_urn:oid:2.49.0.1.840.0.eec56ac59c10723ae36a479ab497c07fa8b3e78c.001.1","noaa_urn:oid:2.49.0.1.840.0.e24b1c75a9c18ab2c2d57dac1a85c5b6c042ff1f.001.1","noaa_urn:oid:2.49.0.1.840.0.2ce8ef25618bbf5a850b81c15a2c0fc43b2aded9.001.1","noaa_urn:oid:2.49.0.1.840.0.b3578603c178dd4178b8576911f6c723bb36f308.001.1","noaa_urn:oid:2.49.0.1.840.0.55d3fd14546cbafc9d86910fc04648e86b005af2.001.1","noaa_urn:oid:2.49.0.1.840.0.6ea2fed2660be6bfc8971bd5d4daddb5106425e3.001.1","noaa_urn:oid:2.49.0.1.840.0.236fb541eca2eaf44d25b74d90783a3648457930.001.1"] |
| Spc ReportType | wind |
| Spc Speed | 65 |
| Spc Location | 1 S Mayetta |
| Spc County | Jackson |
| Spc State | KS |
| Spc Comments | On US-75 south of Mayetta. (TOP) |
| MergedSources | [{"id":"spc_wind_39.32_-95.72_92","source":"spc","severity":"medium","severityValue":45,"timestamp":1789864860000,"latitude":39.32,"longitude":-95.72}] |
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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