This alert expired on 3 September 2026 at 01:45 UTC. It is kept here as a record.
It is the 3rd strongest of the 39 detections recorded within 20 km of this point since 10 May 2026. The last comparable one was on 2 September 2026.
What the source measured
NOAA reported: Flash Flood Warning issued September 2 at 7:03PM CDT until September 2 at 8:45PM CDT by NWS Houston/Galveston TX
Nearby, since 10 May 2026
- May 11, 2026 · score 22 · 1.3 km
- September 2, 2026 · score 16 · 27.0 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 16 out of 100, at 65 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. 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 |
| Our confidence | 65% |
| Coordinates | 30.6312, -94.7550 |
| Nearest City | New Caney (68 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-03T00:03:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.f8c292e5161de0c7d00d17c0571ee7bfb9b1f062.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Polk, TX; San Jacinto, TX; Jasper, TX; Tyler, TX; Liberty, TX; San Jacinto, TX and 2 more areas |
| Headline | Flash Flood Warning issued September 2 at 7:03PM CDT until September 2 at 8:45PM CDT by NWS Houston/Galveston TX |
| Expires | 2026-09-02T20:45:00-05:00 |
| SenderName | NWS Houston/Galveston TX |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f8c292e5161de0c7d00d17c0571ee7bfb9b1f062.001.1","noaa_urn:oid:2.49.0.1.840.0.c2c1b5f3eb6014352ce7777e9781a77dcc926eb6.001.1","noaa_urn:oid:2.49.0.1.840.0.f9c27ee9605211ed6a31b5ac37d1b542fc22f006.001.1","noaa_urn:oid:2.49.0.1.840.0.04015aad88a477169bb08fa592f01c3e2dd49618.001.1","noaa_urn:oid:2.49.0.1.840.0.482cc4d5aa236196c10b89024e91531bd0bcad16.001.1"] |
| Iem TypeSummary | F |
| Iem City | 1 NW Livingston |
| Iem County | Polk |
| Iem State | TX |
| Iem Wfo | HGX |
| Iem Remark | Water over roadway. |
| MergedSources | [{"id":"iem_F_30.790_-94.770_1788386220000","source":"iem","severity":"low","severityValue":25,"timestamp":1788386220000,"latitude":30.79,"longitude":-94.77},{"id":"iem_F_31.000_-94.810_1788375600000","source":"iem","severity":"low","severityValue":25,"timestamp":1788375600000,"latitude":31,"longitude":-94.81},{"id":"iem_F_31.010_-94.760_1788386460000","source":"iem","severity":"low","severityValue":25,"timestamp":1788386460000,"latitude":31.01,"longitude":-94.76},{"id":"iem_F_30.720_-94.950_1788386040000","source":"iem","severity":"low","severityValue":25,"timestamp":1788386040000,"latitude":30.72,"longitude":-94.95}] |
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 16/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.