Right now
The most recent data we hold from NOAA arrived 4 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 3 km from here.
This alert expired on 11 September 2026 at 23:00 UTC. It is kept here as a record.
No stronger detection stands among the 11 recorded within 20 km of this point since 29 April 2026 — 2 others scored the same. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 11 at 5:31PM CDT until September 11 at 6:00PM CDT by NWS Austin/San Antonio TX
An estimated 132,356 people live within 50 km of this point.
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, at 80 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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 | Medium |
| Calamity Score (ours) | 37 / 100 |
| Our confidence | 80% |
| Coordinates | 31.5160, -97.1230 |
| Nearest City | Waco (5 km) |
| Population Exposed | 132.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-11T22:31:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.dd2398798f0a5b2d8027096eeb16b382271129db.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Williamson, TX; Ellis, TX |
| Headline | Severe Thunderstorm Warning issued September 11 at 5:31PM CDT until September 11 at 6:00PM CDT by NWS Austin/San Antonio TX |
| Expires | 2026-09-11T18:00:00-05:00 |
| SenderName | NWS Austin/San Antonio TX |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.dd2398798f0a5b2d8027096eeb16b382271129db.001.1","noaa_urn:oid:2.49.0.1.840.0.7110b5d5d7c2bf8e3bd6efed4168c58315e307d9.001.1"] |
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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