This alert expired on 4 July 2026 at 23:00 UTC. It is kept here as a record.
No stronger detection stands among the 201 recorded within 20 km of this point since 16 March 2026 — 81 others scored the same. Another comparable one was recorded here earlier the same day. 29 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 4 at 6:19PM EDT until July 4 at 7:00PM EDT by NWS Blacksburg VA
An estimated 261,062 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 18, 2026 · score 43 · 2.6 km
- July 9, 2026 · score 22 · 13.7 km
- August 2, 2026 · score 43 · 13.8 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 84 % 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 | 84% |
| Coordinates | 36.3570, -80.6420 |
| Nearest City | Clemmons (44 km) |
| Population Exposed | 261.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T22:19:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.eda75456f7ae01707aa73ac76f0ffb00ee45cccc.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Surry, NC; Carroll, VA; Patrick, VA |
| Headline | Severe Thunderstorm Warning issued July 4 at 6:19PM EDT until July 4 at 7:00PM EDT by NWS Blacksburg VA |
| Expires | 2026-07-04T19:00:00-04:00 |
| SenderName | NWS Blacksburg VA |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | 2 SW White Plains |
| Iem County | Surry |
| Iem State | NC |
| Iem Wfo | RNK |
| Iem Remark | Tree down blocking a lane near intersection of Cadle Ford Road and Old HWY 601. |
| MergedSources | [{"id":"iem_D_36.440_-80.660_1783200780000","source":"iem","severity":"low","severityValue":25,"timestamp":1783200780000,"latitude":36.44,"longitude":-80.66}] |
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.