Right now
The most recent data we hold from NOAA arrived 3 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 19 September 2026 at 01:00 UTC. It is kept here as a record.
It is the 70th strongest of the 80 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 7 September 2026. 61 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 18 at 8:02PM EDT until September 18 at 9:00PM EDT by NWS Greenville-Spartanburg SC
Urban PEI: 95,056 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- September 7, 2026 · score 49 · 10.0 km
- September 6, 2026 · score 49 · 10.0 km
- September 19, 2026 · score 32 · 11.6 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 32 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 32 / 100 |
| Legacy data-support index | 0.85/1 |
| Coordinates | 35.3381, -82.7622 |
| Nearest City | Asheville (35 km) |
| Urban exposure index (PEI) | 95.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-19T00:02:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.ef02c028b2470a261bd5c89d212f02bd0a476657.001.1 |
Physical priority index · v5. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-09-19T00:02:00.000Z.
First archived: 2026-09-19T00:04:32.602Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Greenville, SC; Spartanburg, SC; Sevier, TN |
| Headline | Severe Thunderstorm Warning issued September 18 at 8:02PM EDT until September 18 at 9:00PM EDT by NWS Greenville-Spartanburg SC |
| Expires | 2026-09-18T21:00:00-04:00 |
| SenderName | NWS Greenville-Spartanburg SC |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ef02c028b2470a261bd5c89d212f02bd0a476657.001.1","noaa_urn:oid:2.49.0.1.840.0.1df33bb9f58ec10c8f7aba897f29ccf61c7ce68b.001.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 2 W Cherokee |
| Spc County | Swain |
| Spc State | NC |
| Spc Comments | EM reports complete road blockage due to numerous trees down on Adams Creek Rd between Willie Springs and Eagles Nest. (GSP) |
| MergedSources | [{"id":"spc_wind_35.48_-83.35_28","source":"spc","severity":"medium","severityValue":45,"timestamp":1789776390207,"latitude":35.48,"longitude":-83.35}] |
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.
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