Right now
The most recent data we hold from NOAA arrived 57 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 5 September 2026 at 20:30 UTC. It is kept here as a record.
It is the 34th strongest of the 84 detections recorded within 20 km of this point since 6 July 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 5 at 4:16PM EDT until September 5 at 4:30PM EDT by NWS Greenville-Spartanburg SC
Urban PEI: 34,623 within a heuristic 50 km radius; not unique people.
Nearby, since 6 July 2026
- August 29, 2026 · 11.1 km
- August 11, 2026 · 12.5 km
- July 6, 2026 · 13.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 28 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 v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 28 / 100 |
| Legacy data-support index | 0.81/1 |
| Coordinates | 34.8721, -80.0564 |
| Nearest City | Monroe (47 km) |
| Urban exposure index (PEI) | 34.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-05T20:16:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.951cfb90fc447be2d20ef0d754f45fbb856fc5ee.002.1 |
Physical priority index · v4 (historical). 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: 2026-09-05T20:16:00.000Z.
First archived: 2026-09-05T20:19:30.453Z. 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 | Abbeville, SC; Greenwood, SC; Chester, SC; Fairfield, SC; Kershaw, SC; Lancaster, SC and 11 more areas |
| Headline | Severe Thunderstorm Warning issued September 5 at 4:16PM EDT until September 5 at 4:30PM EDT by NWS Greenville-Spartanburg SC |
| Expires | 2026-09-05T16:30:00-04:00 |
| SenderName | NWS Greenville-Spartanburg SC |
| HasExactCoords | true |
| MergedCount | 14 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.951cfb90fc447be2d20ef0d754f45fbb856fc5ee.002.1","noaa_urn:oid:2.49.0.1.840.0.236b3a72cf2494dff6a5c03ca6c19e8ef8d130ee.002.1","noaa_urn:oid:2.49.0.1.840.0.3ad0a5879646c66e534f3b8d58c58a287b8a12bb.001.1","noaa_urn:oid:2.49.0.1.840.0.8b5c8cc261da38ba22de84751157d36d2f331c93.001.1","noaa_urn:oid:2.49.0.1.840.0.f592b244de24b57391b0300e2c5308c0cd0a800b.001.1","noaa_urn:oid:2.49.0.1.840.0.dea8f50f9c83985c7e46885d5f8f06367ad30b10.002.1","noaa_urn:oid:2.49.0.1.840.0.581ef044d6de608f3ddf5784bdbd464e40d0bff5.001.1","noaa_urn:oid:2.49.0.1.840.0.22371e30258b477364a71efc966b838465cecb61.002.1","noaa_urn:oid:2.49.0.1.840.0.c1a31f05a5cf5c17e64bedd8df9735def7f35c5b.002.1","noaa_urn:oid:2.49.0.1.840.0.e340d3fa80900885d61aa993bd553ad31f240be8.001.1","noaa_urn:oid:2.49.0.1.840.0.445c53dc8095a98af836fcfa25f6cc0df0d17a8a.001.1","noaa_urn:oid:2.49.0.1.840.0.69c3753a857dd71ccc7e91cede777a4fbc17345d.001.1","noaa_urn:oid:2.49.0.1.840.0.9b6b1974d0981a16703d8bc0d0d925a0fe010723.001.1","noaa_urn:oid:2.49.0.1.840.0.91a3815e914e9a04b5427efa006ef7dff9109370.001.1"] |
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 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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