This alert expired on 11 May 2026 at 04:00 UTC. It is kept here as a record.
No stronger detection stands among the 15 recorded within 20 km of this point since 16 March 2026 — 6 others scored the same. The last comparable one was on 9 May 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 10 at 10:25PM CDT until May 10 at 11:00PM CDT by NWS Austin/San Antonio TX
An estimated 1,302,389 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 3, 2026 · score 52 · 6.3 km
- June 3, 2026 · score 52 · 14.3 km
- July 14, 2026 · score 43 · 19.8 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 91 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 52 / 100 |
| Our confidence | 91% |
| Coordinates | 29.8860, -97.9916 |
| Nearest City | San Marcos (5 km) |
| Population Exposed | 1.3M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-11T03:25:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Dimmit, TX; Zavala, TX; Bexar, TX; Medina, TX; Frio, TX; Medina, TX; Zavala, TX and 5 more areas |
| Headline | Severe Thunderstorm Warning issued May 10 at 10:25PM CDT until May 10 at 11:00PM CDT by NWS Austin/San Antonio TX |
| Expires | 2026-05-10T23:00:00-05:00 |
| SenderName | NWS Austin/San Antonio TX |
| HasExactCoords | true |
| MergedCount | 10 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.87e46a96366462951ec0c84a120df359a2da2fe3.001.1","noaa_urn:oid:2.49.0.1.840.0.a338a81a4687c1529c7a82373c990a72350f77db.001.1","noaa_urn:oid:2.49.0.1.840.0.cfc2ecdf98b7b94415e8b2246feaae0c75a31675.001.1","noaa_urn:oid:2.49.0.1.840.0.1e71e51f58ddeaa90110612f736a3a5b7147103d.001.1","noaa_urn:oid:2.49.0.1.840.0.8eea8de8738e5bcf779a380c5c89cb34582a2e69.001.1","noaa_urn:oid:2.49.0.1.840.0.cd8b4417e292e74b63c5e2196730042e806481db.001.1","noaa_urn:oid:2.49.0.1.840.0.e0ff09767795176ca60649640fc8a39aa407f269.001.1","noaa_urn:oid:2.49.0.1.840.0.edaec38222cd697f3bc1af3bebb27833f9adcf66.001.1","noaa_urn:oid:2.49.0.1.840.0.e5b3911dd6b92fe641e3f0b733418e63aa63b69c.001.1","noaa_urn:oid:2.49.0.1.840.0.f2749a118a017e7035c0fbfb4b73cf40f708ef96.002.1"] |
| Google News RssFeed | weather |
| Google News SourceName | FOX 7 Austin |
| MergedSources | [{"id":"gnews_weather_494017_229","source":"google_news","severity":"medium","severityValue":40,"timestamp":1778461650000,"latitude":29.42,"longitude":-98.49},{"id":"gnews_weather_494013_239","source":"google_news","severity":"medium","severityValue":40,"timestamp":1778448445000,"latitude":30.27,"longitude":-97.74},{"id":"gnews_weather_494014_247","source":"google_news","severity":"medium","severityValue":40,"timestamp":1778453640000,"latitude":30.27,"longitude":-97.74},{"id":"gnews_weather_494018_248","source":"google_news","severity":"medium","severityValue":40,"timestamp":1778466862000,"latitude":30.27,"longitude":-97.74}] |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 52/100, near San Marcos (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.