This alert expired on 2 September 2026 at 19:45 UTC. It is kept here as a record.
It is the 2nd strongest of the 5 detections recorded within 20 km of this point since 23 May 2026. The last comparable one was on 5 July 2026.
What the source measured
NOAA reported: Flash Flood Warning issued September 2 at 12:21PM CDT until September 2 at 2:45PM CDT by NWS Houston/Galveston TX
An estimated 36,333 people live within 50 km of this point.
Nearby, since 23 May 2026
- September 2, 2026 · score 28 · 17.2 km
- May 23, 2026 · score 34 · 17.4 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 28 out of 100, at 86 % 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) | 28 / 100 |
| Our confidence | 86% |
| Coordinates | 31.0967, -95.0614 |
| Nearest City | Lufkin (42 km) |
| Population Exposed | 36.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-02T17:21:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.2f90eef258c02ac53fa45f9942f982d2852cd335.001.1 |
Score Breakdown
Technical Details
| Event | Flash Flood Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Polk, TX; Trinity, TX |
| Headline | Flash Flood Warning issued September 2 at 12:21PM CDT until September 2 at 2:45PM CDT by NWS Houston/Galveston TX |
| Expires | 2026-09-02T14:45:00-05:00 |
| SenderName | NWS Houston/Galveston TX |
| HasExactCoords | true |
| Iem TypeSummary | R |
| Iem Magnitude | 3.28 |
| Iem Unit | Inch |
| Iem City | 8 SE Chester |
| Iem County | Tyler |
| Iem State | TX |
| Iem Wfo | LCH |
| MergedSources | [{"id":"iem_R_30.870_-94.500_1788351900000","source":"iem","severity":"low","severityValue":25,"timestamp":1788351900000,"latitude":30.87,"longitude":-94.5},{"id":"iem_R_31.040_-94.530_1788351300000","source":"iem","severity":"low","severityValue":25,"timestamp":1788351300000,"latitude":31.04,"longitude":-94.53},{"id":"iem_R_30.800_-94.570_1788350400000","source":"iem","severity":"low","severityValue":25,"timestamp":1788350400000,"latitude":30.8,"longitude":-94.57},{"id":"iem_R_31.020_-94.400_1788350400000","source":"iem","severity":"low","severityValue":25,"timestamp":1788350400000,"latitude":31.02,"longitude":-94.4},{"id":"iem_R_30.740_-94.430_1788350640000","source":"iem","severity":"low","severityValue":25,"timestamp":1788350640000,"latitude":30.74,"longitude":-94.43},{"id":"iem_R_30.820_-94.530_1788351900000","source":"iem","severity":"low","severityValue":25,"timestamp":1788351900000,"latitude":30.82,"longitude":-94.53}] |
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 28/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.