Right now
The most recent data we hold from NOAA arrived 7 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 July 2026 at 19:15 UTC. It is kept here as a record.
It is the 24th strongest of the 32 detections recorded within 20 km of this point since 27 May 2026. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued July 20 at 8:15PM CDT until July 21 at 11:09PM CDT by NWS Austin/San Antonio TX
Nearby, since 27 May 2026
- July 21, 2026 · score 22 · 0.0 km
- July 27, 2026 · score 22 · 17.3 km
- July 28, 2026 · score 22 · 17.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 16 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) | 16 / 100 |
| Legacy data-support index | 0.60/1 |
| Coordinates | 28.5321, -98.8028 |
| Nearest City | San Antonio (103 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-07-21T01:15:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flood Warning_noaa_urn:oid:2.49.0.1.840.0.38fb2d48c43cadc146943c6304c35322 |
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: 2026-07-21T01:15:00.000Z.
First archived: 2026-07-21T01:35:18.121Z. 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 | Flood Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Frio, TX; Dimmit, TX; La Salle, TX and 2 more areas |
| Headline | Flood Warning issued July 20 at 8:15PM CDT until July 21 at 11:09PM CDT by NWS Austin/San Antonio TX |
| Expires | 2026-07-21T14:15:00-05:00 |
| SenderName | NWS Austin/San Antonio TX |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.38fb2d48c43cadc146943c6304c353225cd8670d.001.1","noaa_urn:oid:2.49.0.1.840.0.7bcb6ece4b71972904d35b88b37e6a33aeecf750.001.1","noaa_urn:oid:2.49.0.1.840.0.1f4d0566cfc15fdf2d1b3f37156bdb7acc1a3339.001.1","noaa_urn:oid:2.49.0.1.840.0.de814d7446f2ece0f4c5aa5b774c9fbc045fb596.001.1","noaa_urn:oid:2.49.0.1.840.0.4d230052fd42e478d94664fa1e42c4e8edc60698.001.1"] |
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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