This alert expired on 26 May 2026 at 01:15 UTC. It is kept here as a record.
It is the 10th strongest of the 38 detections recorded within 20 km of this point since 6 May 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 25 at 5:28PM CDT until May 25 at 8:15PM CDT by NWS Austin/San Antonio TX
An estimated 21,262 people live within 50 km of this point.
Nearby, since 6 May 2026
- May 20, 2026 · score 43 · 17.9 km
- May 6, 2026 · score 22 · 20.2 km
- May 7, 2026 · score 28 · 22.2 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 85 % 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) | 34 / 100 |
| Our confidence | 85% |
| Coordinates | 30.2350, -98.4550 |
| Nearest City | Canyon Lake (44 km) |
| Population Exposed | 21.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-25T22:28:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.b0ba9b8d4419b0f908b3a9a7658141984d049a5f.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Blanco, TX |
| Headline | Flash Flood Warning issued May 25 at 5:28PM CDT until May 25 at 8:15PM CDT by NWS Austin/San Antonio TX |
| Expires | 2026-05-25T20:15:00-05:00 |
| SenderName | NWS Austin/San Antonio TX |
| HasExactCoords | true |
| Iem TypeSummary | F |
| Iem City | Johnson City |
| Iem County | Blanco |
| Iem State | TX |
| Iem Wfo | EWX |
| Iem Remark | West Pecan Drive and East Ash Drive low water crossings at Town Creek closed due to water on roadway. |
| MergedSources | [{"id":"iem_F_30.280_-98.410_1779747900000","source":"iem","severity":"low","severityValue":25,"timestamp":1779747900000,"latitude":30.28,"longitude":-98.41}] |
Safety Information
During flooding: never walk, swim, or drive through floodwaters. Six inches of moving water can knock you down, and one foot of water can sweep away a vehicle. Move to higher ground if waters rise. After flooding, avoid contact with floodwater which may contain sewage, chemicals, or debris. Follow local emergency service guidance.
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 in this area?
Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.