This alert expired on 16 March 2026 at 14:00 UTC. It is kept here as a record.
It is the 8th strongest of the 31 detections recorded within 20 km of this point since 12 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued March 16 at 9:47AM EDT until March 16 at 10:00AM EDT by NWS Greenville-Spartanburg SC
An estimated 189,192 people live within 50 km of this point.
Nearby, since 12 March 2026
- June 29, 2026 · score 46 · 7.3 km
- March 13, 2026 · score 52 · 12.3 km
- March 12, 2026 · score 52 · 12.3 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 89 % 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 | 89% |
| Coordinates | 34.8050, -81.0370 |
| Nearest City | Rock Hill (13 km) |
| Population Exposed | 189.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-16T13:47:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.1b1330999654de571ec563db9f8b1f8c |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cabarrus, NC; Mecklenburg, NC; Stokes, NC; Surry, NC; Yadkin, NC; Carroll, VA; Floyd, VA; Patrick, VA; Davie, NC; Rowan, NC and 6 more areas |
| Headline | Severe Thunderstorm Warning issued March 16 at 9:47AM EDT until March 16 at 10:00AM EDT by NWS Greenville-Spartanburg SC |
| Expires | 2026-03-16T10:00:00-04:00 |
| SenderName | NWS Greenville-Spartanburg SC |
| HasExactCoords | true |
| MergedCount | 10 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1b1330999654de571ec563db9f8b1f8cfce4fe0a.002.1","noaa_urn:oid:2.49.0.1.840.0.653183c4e14afa2db971248fd3c9fddf0260d932.002.1","noaa_urn:oid:2.49.0.1.840.0.5e1265eaea07e1450885323c75d48f044671fd74.002.1","noaa_urn:oid:2.49.0.1.840.0.a9715cab32932d6d6f298375205f884492f875a3.001.1","noaa_urn:oid:2.49.0.1.840.0.0cfb39e0bf6a5a55e845b9c4c05e49e13cceaa28.001.1","noaa_urn:oid:2.49.0.1.840.0.76d927597355f4e308268752c4fed7e99e1df556.001.1","noaa_urn:oid:2.49.0.1.840.0.6a35aa7ce75d9052b59213cfb847d6ed2c37cead.001.1","noaa_urn:oid:2.49.0.1.840.0.b923931584dc6595afcd4c168d8e230e6dede777.002.1","noaa_urn:oid:2.49.0.1.840.0.89fbd147a51670fc50091cb721e92c4484d1363e.001.1","noaa_urn:oid:2.49.0.1.840.0.ae8b8a9bc7f310b7adeba47106eb19c33b19edf4.002.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 1 N Gaffney |
| Spc County | Cherokee |
| Spc State | SC |
| Spc Comments | Part of a metal roof torn from building. (GSP) |
| MergedSources | [{"id":"spc_wind_35.08_-81.65_2","source":"spc","severity":"medium","severityValue":45,"timestamp":1773664080000,"latitude":35.08,"longitude":-81.65},{"id":"spc_wind_35.08_-81.65_5","source":"spc","severity":"medium","severityValue":45,"timestamp":1773664800000,"latitude":35.08,"longitude":-81.65}] |
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 near Rock Hill?
Calamity.live data shows a weather event with CalamityScore 43/100, near Rock Hill (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.