This alert expired on 20 May 2026 at 10:45 UTC. It is kept here as a record.
No stronger detection stands among the 27 recorded within 20 km of this point since 11 May 2026 — 12 others scored the same. The last comparable one was on 19 May 2026. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued May 20 at 4:45AM CDT until May 20 at 5:45AM CDT by NWS Corpus Christi TX
An estimated 332,355 people live within 50 km of this point.
Nearby, since 11 May 2026
- May 11, 2026 · score 43 · 11.4 km
- May 19, 2026 · score 43 · 18.9 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 86 % 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) | 43 / 100 |
| Our confidence | 86% |
| Coordinates | 27.6542, -97.0709 |
| Nearest City | Portland (35 km) |
| Population Exposed | 332.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-20T09:45:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.ab630a997382b716465507b257c7c5cb |
Score Breakdown
Technical Details
| Event | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Corpus Christi and Nueces Bays; Copano, Aransas, and Redfish Bays; San Antonio, Mesquite, and Espiritu Santo Bays; Coastal waters from Baffin Bay to Port Aransas out 20 NM; Coastal waters from Port Aransas to Matagorda Ship Channel out 20 NM; Waters from Port Aransas to Matagorda Ship Channel from 20 to 60 NM; Baffin Bay and Upper Laguna Madre; Corpus Christi and Nueces Bays; Coastal waters from Baffin Bay to Port Aransas out 20 NM; Waters from Baffin Bay to Port Aransas from 20 to 60 NM |
| Headline | Special Marine Warning issued May 20 at 4:45AM CDT until May 20 at 5:45AM CDT by NWS Corpus Christi TX |
| Expires | 2026-05-20T05:45:00-05:00 |
| SenderName | NWS Corpus Christi TX |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ab630a997382b716465507b257c7c5cb8b53e83f.001.1","noaa_urn:oid:2.49.0.1.840.0.961a5973782b02a04eccbb251cddafa846ab4ff7.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 69 |
| Iem Unit | MPH |
| Iem City | 1 SSE CC Airport |
| Iem County | Nueces |
| Iem State | TX |
| Iem Wfo | CRP |
| Iem Remark | ASOS station KCRP Corpus Christi. |
| MergedSources | [{"id":"iem_G_27.770_-97.500_1779269820000","source":"iem","severity":"low","severityValue":25,"timestamp":1779269820000,"latitude":27.77,"longitude":-97.5}] |
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 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.