This alert expired on 20 June 2026 at 13:15 UTC. It is kept here as a record.
It is the 7th strongest of the 11 detections recorded within 20 km of this point since 25 May 2026. The last comparable one was on 15 June 2026. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued June 20 at 5:24AM CDT until June 20 at 8:15AM CDT by NWS San Angelo TX
An estimated 44,398 people live within 50 km of this point.
Nearby, since 25 May 2026
- July 16, 2026 · score 40 · 23.1 km
- May 25, 2026 · score 34 · 27.3 km
How we know
Confirmed by 10 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 91 % 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 | 91% |
| Coordinates | 30.0554, -98.6487 |
| Nearest City | Canyon Lake (42 km) |
| Population Exposed | 44.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-20T10:24:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.d8dc32898ccc667ec065cbe126c6fc61 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | San Saba, TX; Bexar, TX; Comal, TX; Kendall, TX; Bexar, TX; Medina, TX |
| Headline | Flash Flood Warning issued June 20 at 5:24AM CDT until June 20 at 8:15AM CDT by NWS San Angelo TX |
| Expires | 2026-06-20T08:15:00-05:00 |
| SenderName | NWS San Angelo TX |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d8dc32898ccc667ec065cbe126c6fc6132a67681.001.1","noaa_urn:oid:2.49.0.1.840.0.a845fc9834e6e3eae79fcf3848b5c90fe9eab122.001.1","noaa_urn:oid:2.49.0.1.840.0.e4a4ae37053c2d94523c29f64ad70879766e3003.001.1"] |
| Iem TypeSummary | F |
| Iem City | San Antonio |
| Iem County | Bexar |
| Iem State | TX |
| Iem Wfo | EWX |
| Iem Remark | Several low water crossings closed across San Antonio and Bexar County. |
| MergedSources | [{"id":"iem_F_29.730_-99.070_1781936520000","source":"iem","severity":"low","severityValue":25,"timestamp":1781936520000,"latitude":29.73,"longitude":-99.07},{"id":"iem_F_29.500_-98.500_1781939160000","source":"iem","severity":"low","severityValue":25,"timestamp":1781939160000,"latitude":29.5,"longitude":-98.5},{"id":"iem_F_29.630_-98.680_1781940000000","source":"iem","severity":"low","severityValue":25,"timestamp":1781940000000,"latitude":29.63,"longitude":-98.68},{"id":"iem_F_29.530_-98.580_1781939700000","source":"iem","severity":"low","severityValue":25,"timestamp":1781939700000,"latitude":29.53,"longitude":-98.58},{"id":"iem_F_29.560_-98.510_1781940180000","source":"iem","severity":"low","severityValue":25,"timestamp":1781940180000,"latitude":29.56,"longitude":-98.51},{"id":"iem_F_29.640_-98.940_1781937180000","source":"iem","severity":"low","severityValue":25,"timestamp":1781937180000,"latitude":29.64,"longitude":-98.94},{"id":"iem_F_29.590_-98.910_1781939100000","source":"iem","severity":"low","severityValue":25,"timestamp":1781939100000,"latitude":29.59,"longitude":-98.91},{"id":"iem_F_29.590_-98.950_1781938020000","source":"iem","severity":"low","severityValue":25,"timestamp":1781938020000,"latitude":29.59,"longitude":-98.95},{"id":"iem_F_29.420_-98.490_1781940300000","source":"iem","severity":"low","severityValue":25,"timestamp":1781940300000,"latitude":29.42,"longitude":-98.49}] |
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.