Right now
The most recent data we hold from NOAA arrived 29 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 June 2026 at 14:45 UTC. It is kept here as a record.
No stronger detection stands among the 16 recorded within 20 km of this point since 8 June 2026 — 13 others scored the same. Another comparable one was recorded here earlier the same day. 12 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Flash Flood Warning issued June 21 at 8:33AM CDT until June 21 at 9:45AM CDT by NWS Houston/Galveston TX
Urban PEI: 203,892 within a heuristic 50 km radius; not unique people.
Nearby, since 8 June 2026
- June 21, 2026 · score 43 · 0.0 km
- June 18, 2026 · score 43 · 14.5 km
- June 10, 2026 · score 37 · 14.5 km
How we know
4 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.90/1 |
| Coordinates | 30.1136, -93.5085 |
| Nearest City | Sulphur (19 km) |
| Urban exposure index (PEI) | 203.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-21T13:33:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Flash Flood Warning_noaa_urn:oid:2.49.0.1.840.0.53a03f9fc3dac578b9cdfcebcea2a3d1 |
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: 2026-06-21T13:33:00.000Z.
First archived: 2026-06-21T14:09:30.757Z. 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 | Chambers, TX; Harris, TX; Liberty, TX; Jefferson, TX; Orange, TX; Acadia, LA; Allen, LA; Evangeline, LA; Jefferson Davis, LA and 1 more areas |
| Headline | Flash Flood Warning issued June 21 at 8:33AM CDT until June 21 at 9:45AM CDT by NWS Houston/Galveston TX |
| Expires | 2026-06-21T09:45:00-05:00 |
| SenderName | NWS Houston/Galveston TX |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.53a03f9fc3dac578b9cdfcebcea2a3d12111d92a.001.1","noaa_urn:oid:2.49.0.1.840.0.6344d0c64431abc72b8a8472519b2fb317f028ef.001.1","noaa_urn:oid:2.49.0.1.840.0.69c5c0a9056862066c67badfc01f6ec155381338.001.1","noaa_urn:oid:2.49.0.1.840.0.13a884cee8b93ebdea3664e62e3ec3d57efe7d26.001.1","noaa_urn:oid:2.49.0.1.840.0.7b2cb778f9459165cd8d4eb45360601092401bab.001.1"] |
| Iem TypeSummary | F |
| Iem City | Groves |
| Iem County | Jefferson |
| Iem State | TX |
| Iem Wfo | LCH |
| Iem Remark | Reports of water entering homes in Groves. |
| MergedSources | [{"id":"iem_F_30.040_-93.850_1782047460000","source":"iem","severity":"low","severityValue":25,"timestamp":1782047460000,"latitude":30.04,"longitude":-93.85},{"id":"iem_F_29.950_-93.920_1782048420000","source":"iem","severity":"low","severityValue":25,"timestamp":1782048420000,"latitude":29.95,"longitude":-93.92},{"id":"iem_F_29.950_-93.920_1782043200000","source":"iem","severity":"low","severityValue":25,"timestamp":1782043200000,"latitude":29.95,"longitude":-93.92}] |
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.
Want to know when something happens near Sulphur?