Special Marine Warning Issued for Coastal Waters Near Port Mansfield TX

Source: NOAA · Coastal Waters Near Port Mansfield, Texas

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NWS Brownsville has issued a Special Marine Warning for multiple coastal waters and Laguna Madre areas until 3:00 AM CDT due to a severe thunderstorm capable of producing waterspouts.

What this NWS weather alert tells you, and what most readers miss

This notice was issued by NOAA on June 4, 2026 and geographically references Coastal Waters Near Port Mansfield, Texas. Its severity classification of "high" signals how the issuing agency weighs the risk of harm if no action is taken — "critical" and "high" tier alerts typically carry direct consumer actions, while "medium" and "low" tend toward informational guidance or monitoring advisories. The category it belongs to — Weather Alerts — determines the regulatory framework behind it, which shapes what remedies (refunds, replacements, recalls, evacuations) are available to affected individuals and who holds statutory responsibility for enforcement.

Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to read it as a data point about the issuing system: how quickly NOAA detected the hazard, how precise the geographic or product-identifier scope is, and whether similar notices have clustered in the same category or region in the last 90 days. Cluster patterns frequently precede a broader regulatory action — a single localized NWS weather alert is isolated; three of them within a quarter often indicate a supply-chain, infrastructure, or seasonal driver that will keep producing notices until something structural changes.

For decision-making, Areazine pairs each alert with the original agency URL, the full agency name, and a timestamp so you can verify the notice against the primary source before acting on it. Tags on this item (weather, alert, Special Marine Warning, South Texas) map to related alerts in the same area of risk — browsing them together gives a clearer picture than any single notice alone, because the shape of an ongoing issue only becomes visible across multiple sequential alerts.

Alert Details

A Special Marine Warning has been issued by the National Weather Service in Brownsville TX. The alert is effective from May 11, 2026 at 1:55 AM CDT until May 11, 2026 at 3:00 AM CDT.

Affected Areas

The warning covers:

  • 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

What You Should Do

Move to safe harbor until hazardous weather passes. Waterspouts can easily overturn boats and create locally hazardous seas. Boats could suffer significant structural damage in high winds. Small craft could capsize in suddenly higher waves.

Expected Conditions

At 1:55 AM CDT, a severe thunderstorm capable of producing waterspouts was located 11 nm east of Riviera Beach, or 36 nm south of Portland, moving southeast at 65 knots. Hazards include waterspouts and wind gusts in excess of 50 knots.

Timeline

The alert is in effect from May 11, 2026 at 1:55 AM CDT and remains until May 11, 2026 at 3:00 AM CDT. The severe thunderstorm will remain over mainly open waters.

Original source: NOAA Official Notice ↗

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Frequently Asked Questions

Common questions about this NWS weather alert.

What is this NWS weather alert about?
NWS Brownsville has issued a Special Marine Warning for multiple coastal waters and Laguna Madre areas until 3:00 AM CDT due to a severe thunderstorm capable of producing waterspouts.
Which agency issued this alert?
This alert was issued by NOAA. The original notice is available at the source link at the bottom of this article.
How severe is this alert?
This alert is classified as "high" severity. Take precautions and monitor for updates.
What area is affected?
This alert affects Coastal Waters Near Port Mansfield, Texas. Check with NOAA for the most current geographic scope.
Where can I find more Weather Alerts updates?
Browse the full Weather Alerts feed on Areazine at areazine.com/weather/ for the latest updates from NOAA and other agencies.