This alert expired on 11 May 2026 at 09:15 UTC. It is kept here as a record.
It is the 4th strongest of the 6 detections recorded within 20 km of this point since 11 May 2026.
What the source measured
NOAA reported: Special Marine Warning issued May 11 at 3:35AM CDT until May 11 at 4:15AM CDT by NWS Brownsville TX
Nearby, since 11 May 2026
- July 10, 2026 · score 22 · 7.2 km
- May 20, 2026 · score 39 · 19.5 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 71 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 22 / 100 |
| Our confidence | 71% |
| Coordinates | 26.5126, -97.1653 |
| Nearest City | San Benito (63 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-11T08:35:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.56905d2ab659d48b9b30a6caf24b9ec9f89ea754.001.1 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Laguna Madre From the Port Of Brownsville to the Arroyo Colorado; Laguna Madre From The Arroyo Colorado To 5 NM North Of Port Mansfield TX; Laguna Madre From 5 nm North Of Port Mansfield To Baffin Bay TX; Coastal waters from Port Mansfield TX to the Rio Grande River out 20 NM; Coastal waters from Baffin Bay to Port Mansfield TX out 20 NM; Waters from Port Mansfield TX to the Rio Grande River from 20 to 60 NM; Waters from Baffin Bay to Port Mansfield TX from 20 to 60 NM |
| Headline | Special Marine Warning issued May 11 at 3:35AM CDT until May 11 at 4:15AM CDT by NWS Brownsville TX |
| Expires | 2026-05-11T04:15:00-05:00 |
| SenderName | NWS Brownsville TX |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 52 |
| Iem Unit | MPH |
| Iem City | 3 NE Harlingen |
| Iem County | Cameron |
| Iem State | TX |
| Iem Wfo | BRO |
| Iem Remark | ASOS at Valley International Airport measured a wind gust associated with a thunderstorm of 52 mph. |
| MergedSources | [{"id":"iem_M_26.810_-97.470_1778486040000","source":"iem","severity":"low","severityValue":25,"timestamp":1778486040000,"latitude":26.81,"longitude":-97.47},{"id":"iem_M_26.800_-97.470_1778485680000","source":"iem","severity":"low","severityValue":25,"timestamp":1778485680000,"latitude":26.8,"longitude":-97.47},{"id":"iem_G_26.230_-97.660_1778487780000","source":"iem","severity":"low","severityValue":25,"timestamp":1778487780000,"latitude":26.23,"longitude":-97.66}] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
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 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.