Right now
The most recent data we hold from NOAA arrived 39 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 20 May 2026 at 14:00 UTC. It is kept here as a record.
No stronger detection stands among the 35 recorded within 20 km of this point since 9 May 2026 — 13 others scored the same. Another comparable one was recorded here earlier the same day. 21 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 20 at 8:27AM CDT until May 20 at 9:00AM CDT by NWS Brownsville TX
An estimated 721,973 people live within 50 km of this point.
Nearby, since 9 May 2026
- May 9, 2026 · score 48 · 5.9 km
- May 20, 2026 · score 48 · 17.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 48 out of 100, at 82 % 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) | 48 / 100 |
| Our confidence | 82% |
| Coordinates | 26.1859, -97.1376 |
| Nearest City | Brownsville (48 km) |
| Population Exposed | 722.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-20T13:27:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.25309fb85aa0cc66b7f4d8fa3147f381 |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Laguna Madre From the Port Of Brownsville to the Arroyo Colorado; Coastal waters from Port Mansfield TX to the Rio Grande River out 20 NM; Waters from Port Mansfield TX to the Rio Grande River from 20 to 60 NM; 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; Coastal waters from Port Mansfield TX to the Rio Grande River 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 20 at 8:27AM CDT until May 20 at 9:00AM CDT by NWS Brownsville TX |
| Expires | 2026-05-20T09:00:00-05:00 |
| SenderName | NWS Brownsville TX |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.25309fb85aa0cc66b7f4d8fa3147f38183bc3414.001.1","noaa_urn:oid:2.49.0.1.840.0.9cffbebb4cbcb1e76ba3cca348fac4707d78ecd5.001.1"] |
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 48/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.