Right now
The most recent data we hold from NOAA arrived 9 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 19:15 UTC. It is kept here as a record.
It is the 30th strongest of the 63 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued June 15 at 12:53PM CDT until June 15 at 2:15PM CDT by NWS Houston/Galveston TX
Urban PEI: 70,227 within a heuristic 50 km radius; not unique people.
Nearby, since 12 March 2026
- June 15, 2026 · score 39 · 6.4 km
- March 12, 2026 · score 39 · 12.7 km
- June 15, 2026 · score 39 · 18.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 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) | 39 / 100 |
| Legacy data-support index | 0.82/1 |
| Coordinates | 31.5446, -94.4617 |
| Nearest City | Nacogdoches (20 km) |
| Urban exposure index (PEI) | 70.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-15T17:53:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.15805794dbe7ab0cad68989ed4fe6f6e |
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: 2026-06-15T17:53:00.000Z.
First archived: 2026-06-15T17:55:15.624Z. 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 | Harris, TX; Harris, TX; Montgomery, TX; Nacogdoches, TX and 5 more areas |
| Headline | Flash Flood Warning issued June 15 at 12:53PM CDT until June 15 at 2:15PM CDT by NWS Houston/Galveston TX |
| Expires | 2026-06-15T14:15:00-05:00 |
| SenderName | NWS Houston/Galveston TX |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.15805794dbe7ab0cad68989ed4fe6f6e31634f74.001.1","noaa_urn:oid:2.49.0.1.840.0.eefb6be31c7b54f26dce8ac9220d80968125e5f1.001.1","noaa_urn:oid:2.49.0.1.840.0.96c5ce45c0353c13f6778b05e732d10f989b8871.001.1","noaa_urn:oid:2.49.0.1.840.0.1aa307b829ec7cc93713027502e30159aa69f260.001.1","noaa_urn:oid:2.49.0.1.840.0.1dcc0b514269d12552c3f11ac04767acbe171704.001.1","noaa_urn:oid:2.49.0.1.840.0.88467b53d7faa2f41b6e992ea1acc274c5a38e90.001.1","noaa_urn:oid:2.49.0.1.840.0.3e9df0b167ba2a6a74b23390585e6ebdda5bb75a.001.1","noaa_urn:oid:2.49.0.1.840.0.f20d4c4023d8da01e4cb4ff03a42eb63e16d2fc1.001.1"] |
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.
Review the area, threshold and delivery channel in your account.
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