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.
2 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert expired on 15 September 2026 at 22:00 UTC. It is kept here as a record.
It is the 10th strongest of the 19 detections recorded within 20 km of this point since 17 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 15 at 4:49PM CDT until September 15 at 5:00PM CDT by NWS Topeka KS
Urban PEI: 150,612 within a heuristic 50 km radius; not unique people.
Nearby, since 17 April 2026
- May 19, 2026 · score 67 · 5.3 km
- July 4, 2026 · score 43 · 18.0 km
- May 19, 2026 · score 43 · 20.2 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 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) | 37 / 100 |
| Legacy data-support index | 0.80/1 |
| Coordinates | 38.7540, -96.1080 |
| Nearest City | Emporia (40 km) |
| Urban exposure index (PEI) | 150.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-15T21:49:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.022200fa7bba7ca2b869336063f95d3c460b642b.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: 2026-09-15T21:49:00.000Z.
First archived: 2026-09-15T21:55:13.202Z. 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 | Lyon, KS; Wabaunsee, KS |
| Headline | Severe Thunderstorm Warning issued September 15 at 4:49PM CDT until September 15 at 5:00PM CDT by NWS Topeka KS |
| Expires | 2026-09-15T17:00:00-05:00 |
| SenderName | NWS Topeka KS |
| HasExactCoords | true |
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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