This alert expired on 27 June 2026 at 21:54 UTC. It is kept here as a record.
No stronger detection stands among the 27 recorded within 20 km of this point since 26 May 2026 — 14 others scored the same. 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 June 27 at 5:44PM EDT until June 27 at 5:45PM EDT by NWS Greenville-Spartanburg SC
An estimated 133,720 people live within 50 km of this point.
Nearby, since 26 May 2026
- July 11, 2026 · score 39 · 6.9 km
- July 13, 2026 · score 43 · 7.3 km
- July 11, 2026 · score 43 · 10.5 km
How we know
Confirmed by 8 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 87 % 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 | 87% |
| Coordinates | 34.6043, -81.9118 |
| Nearest City | Simpsonville (34 km) |
| Population Exposed | 133.7K within 50 km |
| Impact Tier | significant |
| Date | 2026-06-27 — time not reported by the source |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Chester, SC; York, SC; Abbeville, SC; Anderson, SC; Greenville, SC; Laurens, SC |
| Headline | Severe Thunderstorm Warning issued June 27 at 5:44PM EDT until June 27 at 5:45PM EDT by NWS Greenville-Spartanburg SC |
| Expires | 2026-06-27T17:54:00-04:00 |
| SenderName | NWS Greenville-Spartanburg SC |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.af47fa8f0496ee5397a5b0bf318d82ad6e8e775b.001.1","noaa_urn:oid:2.49.0.1.840.0.0a483f7bd7cc7b23553b639ffff103031c9d2a68.001.1"] |
| Iem TypeSummary | D |
| Iem City | 2 NNW Downtown Greenvil |
| Iem County | Greenville |
| Iem State | SC |
| Iem Wfo | GSP |
| Iem Remark | Social media picture of a large tree down along North Main St. |
| MergedSources | [{"id":"iem_D_34.870_-82.380_1782587940000","source":"iem","severity":"low","severityValue":25,"timestamp":1782587940000,"latitude":34.87,"longitude":-82.38},{"id":"iem_D_34.920_-82.280_1782588840000","source":"iem","severity":"low","severityValue":25,"timestamp":1782588840000,"latitude":34.92,"longitude":-82.28},{"id":"iem_D_34.480_-81.880_1782592440000","source":"iem","severity":"low","severityValue":25,"timestamp":1782592440000,"latitude":34.48,"longitude":-81.88},{"id":"iem_D_34.780_-82.670_1782586320000","source":"iem","severity":"low","severityValue":25,"timestamp":1782586320000,"latitude":34.78,"longitude":-82.67},{"id":"iem_D_34.720_-82.290_1782589140000","source":"iem","severity":"low","severityValue":25,"timestamp":1782589140000,"latitude":34.72,"longitude":-82.29},{"id":"iem_D_34.900_-82.330_1782588120000","source":"iem","severity":"low","severityValue":25,"timestamp":1782588120000,"latitude":34.9,"longitude":-82.33},{"id":"iem_D_34.870_-82.390_1782587880000","source":"iem","severity":"low","severityValue":25,"timestamp":1782587880000,"latitude":34.87,"longitude":-82.39}] |
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, near Simpsonville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.