This alert expired on 20 May 2026 at 04:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 32 detections recorded within 20 km of this point since 30 April 2026. Another comparable one was recorded here earlier the same day. 11 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 19 at 10:13PM CDT until May 19 at 11:00PM CDT by NWS Austin/San Antonio TX
An estimated 1,502,583 people live within 50 km of this point.
Nearby, since 30 April 2026
- May 11, 2026 · score 52 · 9.7 km
- August 27, 2026 · score 46 · 10.6 km
- April 30, 2026 · score 52 · 16.0 km
How we know
Confirmed by 7 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 90 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 52 / 100 |
| Our confidence | 90% |
| Coordinates | 30.4075, -97.7207 |
| Nearest City | Jollyville (7 km) |
| Population Exposed | 1.5M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-20T03:13:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.40d2fd65ec8b76b1b9db4d71bd53db68 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Bastrop, TX; Lee, TX; Williamson, TX; Milam, TX; Bastrop, TX; Caldwell, TX; Comal, TX; Gonzales, TX; Guadalupe, TX; Hays, TX; Travis, TX and 1 more areas |
| Headline | Severe Thunderstorm Warning issued May 19 at 10:13PM CDT until May 19 at 11:00PM CDT by NWS Austin/San Antonio TX |
| Expires | 2026-05-19T23:00:00-05:00 |
| SenderName | NWS Austin/San Antonio TX |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.40d2fd65ec8b76b1b9db4d71bd53db68784b69b3.001.1","noaa_urn:oid:2.49.0.1.840.0.4c55ded504e5bdb96bdac56295f5cf1a0bc65bc7.001.1","noaa_urn:oid:2.49.0.1.840.0.5b7a6d1134778c2f8d3e64d1568c4883e6326d0b.002.1","noaa_urn:oid:2.49.0.1.840.0.28ce78970af04be43a07f23a7b14924dc31eaf63.001.1","noaa_urn:oid:2.49.0.1.840.0.c8fa90d2d533d3a287a852443d6c3445af464834.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 70 |
| Iem Unit | MPH |
| Iem City | 2 ESE Serenada |
| Iem County | Williamson |
| Iem State | TX |
| Iem Wfo | EWX |
| Iem Remark | Amateur Radio report at SH 130 & I-35 under the SH 130 overpass near Georgetown, had street lights and several signs blown over. Raining completely horizontal, about 70MPH. |
| Google News RssFeed | weather |
| Google News SourceName | Austin American-Statesman |
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.
Want to know when something happens near Jollyville?
Calamity.live data shows a weather event with CalamityScore 52/100, near Jollyville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.