Right now
The most recent data we hold from NOAA arrived 12 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 28 July 2026 at 21:30 UTC. It is kept here as a record.
It is the 3rd strongest of the 29 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 28 at 5:09PM EDT until July 28 at 5:30PM EDT by NWS Greenville-Spartanburg SC
Urban PEI: 18,156 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- September 5, 2026 · score 32 · 14.1 km
- July 28, 2026 · score 63 · 20.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
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 | 0.80/1 |
| Coordinates | 36.4053, -81.6392 |
| Nearest City | Boone (21 km) |
| Urban exposure index (PEI) | 18.2K within 50 km |
| Impact Tier | significant |
| Date | 2026-07-28 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.67d9057ee786d672e8f947618fdda434 |
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: 2026-07-28 — time not reported.
First archived: 2026-07-28T21:10:16.347Z. 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 | Alexander, NC; Iredell, NC; Ashe, NC; Watauga, NC; Wilkes, NC; Bedford, VA; Franklin, VA; Roanoke, VA; City of Roanoke, VA and 7 more areas |
| Headline | Severe Thunderstorm Warning issued July 28 at 5:09PM EDT until July 28 at 5:30PM EDT by NWS Greenville-Spartanburg SC |
| Expires | 2026-07-28T17:30:00-04:00 |
| SenderName | NWS Greenville-Spartanburg SC |
| HasExactCoords | true |
| MergedCount | 10 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.67d9057ee786d672e8f947618fdda434dc01f374.001.1","noaa_urn:oid:2.49.0.1.840.0.a1ac944e401ab87e7337073ba0507efbc4abda60.002.1","noaa_urn:oid:2.49.0.1.840.0.cfc49a91ef3fd78fb844a7e73cde714c0a50897d.002.1","noaa_urn:oid:2.49.0.1.840.0.a299986584f57adbeb7d6032c3d5fdc7473855ca.001.1","noaa_urn:oid:2.49.0.1.840.0.237d91850192479d8eac29af3c0e1faa5e4bc437.001.1","noaa_urn:oid:2.49.0.1.840.0.d026ff23877324e86941cc09a79ab7736e27e1c9.001.1","noaa_urn:oid:2.49.0.1.840.0.491cbcaaaeacbf425b8dcf44d1ac37382ffebd9e.001.1","noaa_urn:oid:2.49.0.1.840.0.0894c39ad0c343e32b079a68a1d058519ca79222.001.1","noaa_urn:oid:2.49.0.1.840.0.9779e3ff8094f083d042d15d8a9d459ec1bb748a.001.1","noaa_urn:oid:2.49.0.1.840.0.b836517feb64b226e2414ec342adf30f2613297c.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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens near Boone?