Right now
The most recent data we hold from NOAA arrived 8 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 18 June 2026 at 22:00 UTC. It is kept here as a record.
No stronger detection stands among the 123 recorded within 20 km of this point since 16 March 2026 — 13 others scored the same. The last comparable one was on 17 March 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 18 at 5:28PM EDT until June 18 at 6:00PM EDT by NWS Blacksburg VA
Urban PEI: 18,156 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- June 18, 2026 · score 34 · 0.0 km
- July 20, 2026 · score 34 · 11.5 km
- July 13, 2026 · score 34 · 13.3 km
How we know
5 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 | 0.89/1 |
| Coordinates | 36.3312, -81.1488 |
| Nearest City | Boone (48 km) |
| Urban exposure index (PEI) | 18.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-18T21:28:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.60f65266573ec80e99f145ec68a87f719b12be27.001.1 |
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: 2026-06-18T21:28:00.000Z.
First archived: 2026-06-18T21:53:19.285Z. 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 | Alleghany, NC; Ashe, NC; Surry, NC; Wilkes, NC |
| Headline | Severe Thunderstorm Warning issued June 18 at 5:28PM EDT until June 18 at 6:00PM EDT by NWS Blacksburg VA |
| Expires | 2026-06-18T18:00:00-04:00 |
| SenderName | NWS Blacksburg VA |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | 2 NE Dobson |
| Iem County | Surry |
| Iem State | NC |
| Iem Wfo | RNK |
| Iem Remark | 911 Call Center reported a tree down at the intersection of Rockford street and Old Highway 601 in Mount Airy North Carolina. |
| MergedSources | [{"id":"iem_D_36.430_-80.740_1781816760000","source":"iem","severity":"low","severityValue":25,"timestamp":1781816760000,"latitude":36.43,"longitude":-80.74},{"id":"iem_D_36.430_-80.680_1781817360000","source":"iem","severity":"low","severityValue":25,"timestamp":1781817360000,"latitude":36.43,"longitude":-80.68},{"id":"iem_D_36.420_-80.680_1781817300000","source":"iem","severity":"low","severityValue":25,"timestamp":1781817300000,"latitude":36.42,"longitude":-80.68},{"id":"iem_D_36.410_-80.690_1781817000000","source":"iem","severity":"low","severityValue":25,"timestamp":1781817000000,"latitude":36.41,"longitude":-80.69}] |
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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