Right now
The most recent data we hold from NOAA arrived 11 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 2 July 2026 at 22:00 UTC. It is kept here as a record.
It is the 5th strongest of the 33 detections recorded within 20 km of this point since 16 March 2026. The last comparable one was on 1 June 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 2 at 5:40PM EDT until July 2 at 6:00PM EDT by NWS Greenville-Spartanburg SC
Urban PEI: 42,781 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- September 6, 2026 · score 32 · 10.9 km
- June 1, 2026 · score 39 · 12.2 km
- August 10, 2026 · score 34 · 13.1 km
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 34 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 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) | 34 / 100 |
| Legacy data-support index | 0.87/1 |
| Coordinates | 34.5098, -83.0399 |
| Nearest City | Clemson (26 km) |
| Urban exposure index (PEI) | 42.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-02T21:40:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.2bcd87e41b3085ac59057fdb4217fea7 |
Physical priority index · v1. 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: 2026-07-02T21:40:00.000Z.
First archived: 2026-07-02T21:45:02.338Z. 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 | Greenwood, SC; Abbeville, SC; Greenwood, SC; Clay, NC and 1 more areas |
| Headline | Severe Thunderstorm Warning issued July 2 at 5:40PM EDT until July 2 at 6:00PM EDT by NWS Greenville-Spartanburg SC |
| Expires | 2026-07-02T18:00:00-04:00 |
| SenderName | NWS Greenville-Spartanburg SC |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.2bcd87e41b3085ac59057fdb4217fea7e980554d.001.1","noaa_urn:oid:2.49.0.1.840.0.a70dae013e2e55c387682e00401d29cda1ea7dd1.001.1","noaa_urn:oid:2.49.0.1.840.0.93e84f20b2b65bd503655a16263f3f819d16da84.001.1","noaa_urn:oid:2.49.0.1.840.0.32610e89f16499c1a63c8e5ed415b37deec5c453.001.1"] |
| Iem TypeSummary | D |
| Iem City | 3 S Powdersville |
| Iem County | Anderson |
| Iem State | SC |
| Iem Wfo | GSP |
| Iem Remark | Tree down across Old Williamston Road. |
| MergedSources | [{"id":"iem_D_34.790_-82.690_1783021260000","source":"iem","severity":"low","severityValue":25,"timestamp":1783021260000,"latitude":34.79,"longitude":-82.69},{"id":"iem_D_34.750_-82.500_1783025760000","source":"iem","severity":"low","severityValue":25,"timestamp":1783025760000,"latitude":34.75,"longitude":-82.5}] |
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.
Review the area, threshold and delivery channel in your account.
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