Right now
The most recent data we hold from NOAA arrived 2 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 16 July 2026 at 20:00 UTC. It is kept here as a record.
No stronger detection stands among the 57 recorded within 20 km of this point since 16 March 2026 — 13 others scored the same. Another comparable one was recorded here earlier the same day. 36 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flood Warning issued July 15 at 8:51PM CDT until July 17 at 11:35AM CDT by NWS Houston/Galveston TX
Urban PEI: 1,526,656 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- July 20, 2026 · score 52 · 5.1 km
- June 20, 2026 · score 52 · 15.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 52 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) | 52 / 100 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 29.2340, -98.9558 |
| Nearest City | San Antonio (50 km) |
| Urban exposure index (PEI) | 1.5M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-20T01:20:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flood Warning_noaa_urn:oid:2.49.0.1.840.0.3869160adfa7e6d8656d771faa74cfa1 |
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: 2026-07-20T01:20:00.000Z.
First archived: 2026-07-16T02:28:22.166Z. 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 | Matagorda, TX; Wharton, TX; Jackson, TX; Wharton, TX; Karnes, TX; Wilson, TX and 12 more areas |
| Headline | Flood Warning issued July 15 at 8:51PM CDT until July 17 at 11:35AM CDT by NWS Houston/Galveston TX |
| Expires | 2026-07-16T15:00:00-05:00 |
| SenderName | NWS Houston/Galveston TX |
| HasExactCoords | true |
| MergedCount | 21 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.3869160adfa7e6d8656d771faa74cfa1610bb7ef.002.1","noaa_urn:oid:2.49.0.1.840.0.3869160adfa7e6d8656d771faa74cfa1610bb7ef.001.1","noaa_urn:oid:2.49.0.1.840.0.2f5f88a2f7a72d59cc5dba953ab5221d21e116c5.001.1","noaa_urn:oid:2.49.0.1.840.0.72608bcc148cee8b2ec4824c4c784d5d4e0646f7.003.1","noaa_urn:oid:2.49.0.1.840.0.72608bcc148cee8b2ec4824c4c784d5d4e0646f7.004.1","noaa_urn:oid:2.49.0.1.840.0.72608bcc148cee8b2ec4824c4c784d5d4e0646f7.006.1","noaa_urn:oid:2.49.0.1.840.0.72608bcc148cee8b2ec4824c4c784d5d4e0646f7.008.1","noaa_urn:oid:2.49.0.1.840.0.72608bcc148cee8b2ec4824c4c784d5d4e0646f7.002.1","noaa_urn:oid:2.49.0.1.840.0.72608bcc148cee8b2ec4824c4c784d5d4e0646f7.005.1","noaa_urn:oid:2.49.0.1.840.0.72608bcc148cee8b2ec4824c4c784d5d4e0646f7.007.1","noaa_urn:oid:2.49.0.1.840.0.8732a855ab41ca741f22d6f42c50036f536256cd.004.1","noaa_urn:oid:2.49.0.1.840.0.8732a855ab41ca741f22d6f42c50036f536256cd.006.1","noaa_urn:oid:2.49.0.1.840.0.8732a855ab41ca741f22d6f42c50036f536256cd.009.1","noaa_urn:oid:2.49.0.1.840.0.d78a5f54a63ef2c351d4ed4ba869f69da585fbda.001.1","noaa_urn:oid:2.49.0.1.840.0.5f3eabc5dc8d6486672c33f6e8c6b0e8f4a2915a.001.1","noaa_urn:oid:2.49.0.1.840.0.a765f3faef3d84206068fffec15bb95f2c3288e0.001.1","noaa_urn:oid:2.49.0.1.840.0.0d86901b57f8c8cf42fa3884b35571193665d520.001.1","noaa_urn:oid:2.49.0.1.840.0.c69998dcb2c7f3446e70eee389d981bf47fa8033.001.1","noaa_urn:oid:2.49.0.1.840.0.d46f09607b8303cd33602ca0b4b75cf742969fdb.001.1","noaa_urn:oid:2.49.0.1.840.0.737b866f8145b1eb5a2d2014baa4135a90cb0a47.001.1","noaa_urn:oid:2.49.0.1.840.0.72608bcc148cee8b2ec4824c4c784d5d4e0646f7.001.1"] |
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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