Right now
The most recent data we hold from NOAA arrived 19 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 21 May 2026 at 07:15 UTC. It is kept here as a record.
It is the 21st strongest of the 47 detections recorded within 20 km of this point since 6 May 2026. The last comparable one was on 20 May 2026. 16 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued May 20 at 11:12PM CDT until May 21 at 2:15AM CDT by NWS San Angelo TX
Nearby, since 6 May 2026
- August 28, 2026 · score 22 · 8.9 km
- August 27, 2026 · score 22 · 16.3 km
- July 6, 2026 · score 22 · 17.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 62 % 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) | 22 / 100 |
| Our confidence | 62% |
| Coordinates | 30.4560, -99.6860 |
| Nearest City | Kerrville (69 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-21T04:12:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.03af9945f77035d57d225ce690d817a62ad00a04.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Kimble, TX; Mason, TX |
| Headline | Flash Flood Warning issued May 20 at 11:12PM CDT until May 21 at 2:15AM CDT by NWS San Angelo TX |
| Expires | 2026-05-21T02:15:00-05:00 |
| SenderName | NWS San Angelo TX |
| HasExactCoords | true |
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 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.