Right now
The most recent data we hold from NOAA arrived 4 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 15 June 2026 at 09:35 UTC. It is kept here as a record.
It is the 5th strongest of the 23 detections recorded within 20 km of this point since 20 May 2026. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued June 15 at 4:25AM CDT until June 15 at 4:30AM CDT by NWS Austin/San Antonio TX
Urban PEI: 117,679 within a heuristic 50 km radius; not unique people.
Nearby, since 20 May 2026
- May 20, 2026 · score 43 · 7.5 km
- May 25, 2026 · score 34 · 14.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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) | 43 / 100 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 30.1530, -98.3385 |
| Nearest City | Canyon Lake (31 km) |
| Urban exposure index (PEI) | 117.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-15T09:25:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.06738acf0c2417e49f5863e53a0b1542 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-06-15T09:25:00.000Z.
First archived: 2026-06-15T09:28:24.551Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Gillespie, TX; Bexar, TX; Comal, TX; Guadalupe, TX; Hays, TX; Blanco, TX; Comal, TX; Hays, TX and 8 more areas |
| Headline | Flash Flood Warning issued June 15 at 4:25AM CDT until June 15 at 4:30AM CDT by NWS Austin/San Antonio TX |
| Expires | 2026-06-15T04:35:00-05:00 |
| SenderName | NWS Austin/San Antonio TX |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.06738acf0c2417e49f5863e53a0b1542711dfe81.001.1","noaa_urn:oid:2.49.0.1.840.0.b8d18e121d4a38dfaa6057b27c0f4e5ff07e7ea0.001.1","noaa_urn:oid:2.49.0.1.840.0.21e7bf8e6a841809d0fcdc8812ba5ddfcaba7cce.001.1","noaa_urn:oid:2.49.0.1.840.0.64509405ac91e17570b9adb09d72616cb2d3317f.001.1","noaa_urn:oid:2.49.0.1.840.0.919806b257d3b2d58f98cf4c496ee04e33774d0a.001.1","noaa_urn:oid:2.49.0.1.840.0.b9d2c90d1d251fd8a8051d60ce200359a6df84d1.001.1","noaa_urn:oid:2.49.0.1.840.0.b550971e3b0f2a91000981e294514eabd08a0cc6.001.1","noaa_urn:oid:2.49.0.1.840.0.f76560282d97281cd51f2ab8c7aa19b9484c9679.001.1","noaa_urn:oid:2.49.0.1.840.0.e71cc85faf0d7f5403ed4436f1d06fb0a2845768.001.1","noaa_urn:oid:2.49.0.1.840.0.054d1b3cce6d8da24de3322500373265c7d1c198.001.1","noaa_urn:oid:2.49.0.1.840.0.e1142c81bcf1e1fe1d5896ea73b0644787c2d2cb.001.1"] |
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.
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