This alert expired on 20 July 2026 at 20:15 UTC. It is kept here as a record.
It is the 10th strongest of the 38 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 20 at 3:37PM EDT until July 20 at 4:15PM EDT by NWS Blacksburg VA
An estimated 36,044 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 13, 2026 · score 34 · 6.9 km
- March 17, 2026 · score 34 · 7.5 km
- March 16, 2026 · score 34 · 7.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 out of 100, at 81 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 34 / 100 |
| Our confidence | 81% |
| Coordinates | 36.2455, -81.2203 |
| Nearest City | Boone (40 km) |
| Population Exposed | 36.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-20T19:37:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Surry, NC; Carroll, VA; Caldwell, NC |
| Headline | Severe Thunderstorm Warning issued July 20 at 3:37PM EDT until July 20 at 4:15PM EDT by NWS Blacksburg VA |
| Expires | 2026-07-20T16:15:00-04:00 |
| SenderName | NWS Blacksburg VA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.257fdfa15152942746feb73d3f6718a7378ed853.002.1","noaa_urn:oid:2.49.0.1.840.0.55243ce1cd9ab2c82086cfb428653f421db63b72.001.1"] |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 34/100, near Boone (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.