This alert expired on 16 March 2026 at 14:30 UTC. It is kept here as a record.
No stronger detection stands among the 81 recorded within 20 km of this point since 16 March 2026 — 2 others scored the same. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued March 16 at 10:05AM EDT until March 16 at 10:30AM EDT by NWS Blacksburg VA
An estimated 501,766 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 7, 2026 · score 48 · 2.8 km
- August 29, 2026 · score 48 · 7.9 km
- August 28, 2026 · score 48 · 7.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 72 out of 100, at 78 % 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 | Critical |
| Calamity Score (ours) | 72 / 100 |
| Our confidence | 78% |
| Coordinates | 35.9700, -80.4287 |
| Nearest City | Clemmons (7 km) |
| Population Exposed | 501.8K within 50 km |
| Impact Tier | catastrophic |
| Timestamp | 2026-03-16T14:05:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.d87573b8758722d30dea67a6c85469a5 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Patrick, VA; Cabarrus, NC |
| Headline | Tornado Warning issued March 16 at 10:05AM EDT until March 16 at 10:30AM EDT by NWS Blacksburg VA |
| Expires | 2026-03-16T10:30:00-04:00 |
| SenderName | NWS Blacksburg VA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d87573b8758722d30dea67a6c85469a5ee276e6e.002.1","noaa_urn:oid:2.49.0.1.840.0.da5496389993a6ad738f64e07758455829ab0c92.002.1"] |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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 Clemmons?
Calamity.live data shows a weather event with CalamityScore 72/100, near Clemmons (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.