This alert expired on 18 July 2026 at 17:15 UTC. It is kept here as a record.
It is the 29th strongest of the 50 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 30 June 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 18 at 12:35PM EDT until July 18 at 1:15PM EDT by NWS Greenville-Spartanburg SC
An estimated 251,004 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 12, 2026 · score 43 · 10.6 km
- June 13, 2026 · score 43 · 16.8 km
- August 4, 2026 · score 43 · 17.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 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) | 43 / 100 |
| Our confidence | 81% |
| Coordinates | 35.2540, -82.5980 |
| Nearest City | Asheville (39 km) |
| Population Exposed | 251.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-18T16:35:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.eb5215c141cc15aebbfb21cb768ab1669854516f.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Henderson, NC; Transylvania, NC |
| Headline | Severe Thunderstorm Warning issued July 18 at 12:35PM EDT until July 18 at 1:15PM EDT by NWS Greenville-Spartanburg SC |
| Expires | 2026-07-18T13:15:00-04:00 |
| SenderName | NWS Greenville-Spartanburg SC |
| HasExactCoords | true |
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 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.