This alert expired on 12 August 2026 at 01:00 UTC. It is kept here as a record.
It is the 7th strongest of the 19 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 11 at 8:50PM EDT until August 11 at 9:00PM EDT by NWS Blacksburg VA
An estimated 110,150 people live within 50 km of this point.
Nearby, since 16 March 2026
- March 16, 2026 · score 43 · 10.4 km
- July 28, 2026 · score 67 · 11.5 km
- July 28, 2026 · score 67 · 14.5 km
How we know
Confirmed by 11 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 90 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 43 / 100 |
| Our confidence | 90% |
| Coordinates | 35.8646, -82.6645 |
| Nearest City | Asheville (31 km) |
| Population Exposed | 110.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-12T00:50:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.2b2e04fd08760c12113e2c74c9198106 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Alleghany, NC; Ashe, NC; Carroll, VA; Grayson, VA; Pulaski, VA; Smyth, VA; Wythe, VA; City of Galax, VA; Carter, TN; Johnson, TN; Carter, TN; Greene, TN; Hawkins, TN; Sullivan, TN; Unicoi, TN; Washington, TN and 6 more areas |
| Headline | Severe Thunderstorm Warning issued August 11 at 8:50PM EDT until August 11 at 9:00PM EDT by NWS Blacksburg VA |
| Expires | 2026-08-11T21:00:00-04:00 |
| SenderName | NWS Blacksburg VA |
| HasExactCoords | true |
| MergedCount | 9 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.2b2e04fd08760c12113e2c74c91981062b076c93.001.1","noaa_urn:oid:2.49.0.1.840.0.31a9d43585d211d7b14c61b8c8c56655578f4eaf.001.1","noaa_urn:oid:2.49.0.1.840.0.e28cd0708cfee33130f5047879a449ef8e0c6914.002.1","noaa_urn:oid:2.49.0.1.840.0.e40f02bea413ea21a63a2f1d0ace758762d4d5b7.002.1","noaa_urn:oid:2.49.0.1.840.0.b4c435653f4aaa5220654b65c5f9556ed1e3f5b6.001.1","noaa_urn:oid:2.49.0.1.840.0.e5f340f2a8803278f36af501f79f84f530c17d93.001.1","noaa_urn:oid:2.49.0.1.840.0.6e1b8538289fb7562c5f131aed5f74189d7d7501.001.1","noaa_urn:oid:2.49.0.1.840.0.c12b13d7320cb78ca298aa1f7b00976345808db0.001.1","noaa_urn:oid:2.49.0.1.840.0.75705b888c99541ef6bd733a89ee3329c65992ed.001.1"] |
| Iem TypeSummary | D |
| Iem City | 3 ENE Hampton |
| Iem County | Carter |
| Iem State | TN |
| Iem Wfo | MRX |
| Iem Remark | Carter County dispatch reports a few trees down but no significant damage. Time estimated by radar. |
| MergedSources | [{"id":"iem_D_35.700_-82.030_1786480980000","source":"iem","severity":"low","severityValue":25,"timestamp":1786480980000,"latitude":35.7,"longitude":-82.03},{"id":"iem_D_35.680_-81.990_1786481340000","source":"iem","severity":"low","severityValue":25,"timestamp":1786481340000,"latitude":35.68,"longitude":-81.99},{"id":"iem_D_35.740_-81.880_1786478100000","source":"iem","severity":"low","severityValue":25,"timestamp":1786478100000,"latitude":35.74,"longitude":-81.88},{"id":"iem_D_35.730_-81.860_1786478100000","source":"iem","severity":"low","severityValue":25,"timestamp":1786478100000,"latitude":35.73,"longitude":-81.86},{"id":"iem_H_35.680_-82.010_1786481400000","source":"iem","severity":"low","severityValue":25,"timestamp":1786481400000,"latitude":35.68,"longitude":-82.01},{"id":"iem_H_35.650_-81.970_1786481880000","source":"iem","severity":"low","severityValue":25,"timestamp":1786481880000,"latitude":35.65,"longitude":-81.97},{"id":"iem_D_35.690_-82.910_1786480980000","source":"iem","severity":"low","severityValue":25,"timestamp":1786480980000,"latitude":35.69,"longitude":-82.91},{"id":"iem_D_36.360_-82.160_1786494840000","source":"iem","severity":"low","severityValue":25,"timestamp":1786494840000,"latitude":36.36,"longitude":-82.16},{"id":"iem_D_35.620_-81.990_1786482720000","source":"iem","severity":"low","severityValue":25,"timestamp":1786482720000,"latitude":35.62,"longitude":-81.99},{"id":"iem_D_36.290_-82.130_1786479840000","source":"iem","severity":"low","severityValue":25,"timestamp":1786479840000,"latitude":36.29,"longitude":-82.13}] |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.