Right now
The most recent data we hold from NOAA arrived 6 minutes ago, and this point is in it.
6 other detections within 20 km in the last 24 hours, the nearest 5 km from here.
This alert is in force until 21 September 2026, 22:15 UTC.
No stronger detection stands among the 16 recorded within 20 km of this point since 4 July 2026 — one other scored the same. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 21 at 5:11PM EDT until September 21 at 6:15PM EDT by NWS Blacksburg VA
Urban PEI: 83,561 within a heuristic 50 km radius; not unique people.
Nearby, since 4 July 2026
- July 8, 2026 · score 39 · 12.2 km
- July 28, 2026 · score 43 · 20.4 km
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 45 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 | High |
| Calamity Score (ours) | 45 / 100 |
| Legacy data-support index | 0.90/1 |
| Coordinates | 37.1545, -80.6656 |
| Nearest City | Radford (8 km) |
| Urban exposure index (PEI) | 83.6K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-09-21T21:11:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.dede6ede167ebeb1d13a5b1a00960d6ec639255e.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: 2026-09-21T21:11:00.000Z.
First archived: 2026-09-21T21:14:22.961Z. 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 | Caswell, NC; Rockingham, NC; Halifax, VA; Henry, VA; Pittsylvania, VA; City of Danville, VA; Forsyth, NC; Guilford, NC; Rockingham, NC; Stokes, NC; Henry, VA; Pittsylvania, VA and 3 more areas |
| Headline | Severe Thunderstorm Warning issued September 21 at 5:11PM EDT until September 21 at 6:15PM EDT by NWS Blacksburg VA |
| Expires | 2026-09-21T18:15:00-04:00 |
| SenderName | NWS Blacksburg VA |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.dede6ede167ebeb1d13a5b1a00960d6ec639255e.001.1","noaa_urn:oid:2.49.0.1.840.0.b10bf1972f2a8b85503c373a8a18837712a4803d.001.1","noaa_urn:oid:2.49.0.1.840.0.824fa0d67a0cb4020ab1f40b768968f62338d76e.002.1","noaa_urn:oid:2.49.0.1.840.0.2f973be2fd8e9c08f2b54b32989669a93b42308e.001.1","noaa_urn:oid:2.49.0.1.840.0.492e5787636309e73b4d4ca8674586355d6d9d92.001.1","noaa_urn:oid:2.49.0.1.840.0.06faa34ca510d337ef4b769306ab8af3c832f420.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 125 |
| Spc Location | 4 S Endicott |
| Spc County | Patrick |
| Spc State | VA |
| Spc Comments | Hail with a diameter slightly larger than a quarter observed near Endicott. (RNK) |
| Iem TypeSummary | D |
| Iem City | 1 WNW Laurel Branch |
| Iem County | Monroe |
| Iem State | WV |
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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