Special Marine Warning Issued for Waters Near Port Mansfield TX

Source: NOAA · South Texas Coastal Waters

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NWS Brownsville has issued a Special Marine Warning for coastal waters from Baffin Bay to Port Mansfield TX until 6:00 AM CDT due to a severe thunderstorm with wind gusts over 50 knots.

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

This notice was issued by NOAA on June 11, 2026 and geographically references South Texas Coastal Waters. 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 (event code MAW) has been issued by the National Weather Service Brownsville TX. The alert is effective from May 20, 2026 at 5:07 AM CDT until May 20, 2026 at 6:00 AM CDT.

Affected Areas

The warning covers Laguna Madre From 5 nm North Of Port Mansfield To Baffin Bay TX; Coastal waters from Baffin Bay to Port Mansfield TX out 20 NM; and Waters from Baffin Bay to Port Mansfield TX from 20 to 60 NM.

What You Should Do

Frequent lightning is occurring with this storm. If caught on the open water stay below deck if possible, keep away from ungrounded metal objects. Boats could suffer significant structural damage in high winds. Small craft could capsize in suddenly higher waves.

Expected Conditions

At 5:07 AM CDT, a severe thunderstorm was located 11 nm southeast of Riviera Beach, or 38 nm north of Port Mansfield, moving southeast at 30 knots. Hazard includes wind gusts in excess of 50 knots.

Timeline

The alert is in effect from May 20, 2026 at 5:07 AM CDT and expires at 6:00 AM CDT the same day. 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 coastal waters from Baffin Bay to Port Mansfield TX until 6:00 AM CDT due to a severe thunderstorm with wind gusts over 50 knots.
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 South Texas Coastal Waters. 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.