Right now
The most recent data we hold from NOAA arrived 19 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 11 May 2026 at 19:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 20 detections recorded within 20 km of this point since 9 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 11 at 2:33PM EDT until May 11 at 3:00PM EDT by NWS Wilmington NC
Urban PEI: 87,619 within a heuristic 50 km radius; not unique people.
Nearby, since 9 March 2026
- March 13, 2026 · score 39 · 10.9 km
- March 12, 2026 · score 39 · 10.9 km
- March 9, 2026 · score 22 · 13.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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) | 39 / 100 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 33.8245, -79.1761 |
| Nearest City | Conway (12 km) |
| Urban exposure index (PEI) | 87.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-11T18:33:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.c183d4e9a5e80e2fb23497d882b3fddd |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-05-11T18:33:00.000Z.
First archived: 2026-05-11T18:37:14.630Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Horry, SC; Georgetown, SC; Williamsburg, SC; Columbus, NC; Horry, SC |
| Headline | Severe Thunderstorm Warning issued May 11 at 2:33PM EDT until May 11 at 3:00PM EDT by NWS Wilmington NC |
| Expires | 2026-05-11T15:00:00-04:00 |
| SenderName | NWS Wilmington NC |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c183d4e9a5e80e2fb23497d882b3fddd8b3f7e39.001.1","noaa_urn:oid:2.49.0.1.840.0.25bf50dca5a3252bb846388f5e174c37ad721e14.001.1","noaa_urn:oid:2.49.0.1.840.0.018840ffee3aa67f79a2841541112a725372648f.002.1"] |
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.
Review the area, threshold and delivery channel in your account.
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