Right now
The most recent data we hold from NOAA arrived 5 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 12 August 2026 at 01:00 UTC. It is kept here as a record.
No stronger detection stands among the 24 recorded within 20 km of this point since 16 March 2026 — 9 others scored the same. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 11 at 8:11PM EDT until August 11 at 9:00PM EDT by NWS Greenville-Spartanburg SC
An estimated 127,990 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 19, 2026 · score 43 · 7.0 km
How we know
Confirmed by 12 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 | 36.2417, -82.0446 |
| Nearest City | Johnson City (28 km) |
| Population Exposed | 128.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-12T00:11:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.6641964326fbfa8813a4e6e4d2c0c3f4 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Laurens, SC; Spartanburg, SC; Union, SC; Carter, TN; Greene, TN; Hancock, TN; Hawkins, TN; Sullivan, TN; Unicoi, TN; Washington, TN; Alleghany, NC; Ashe, NC; Bland, VA; Carroll, VA; Grayson, VA; Pulaski, VA; Smyth, VA; Wythe, VA; City of Galax, VA and 10 more areas |
| Headline | Severe Thunderstorm Warning issued August 11 at 8:11PM EDT until August 11 at 9:00PM EDT by NWS Greenville-Spartanburg SC |
| Expires | 2026-08-11T21:00:00-04:00 |
| SenderName | NWS Greenville-Spartanburg SC |
| HasExactCoords | true |
| MergedCount | 13 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6641964326fbfa8813a4e6e4d2c0c3f4a94cdf09.001.1","noaa_urn:oid:2.49.0.1.840.0.825d2fd3410513b4654ce697bb39d3f92513b1d5.001.1","noaa_urn:oid:2.49.0.1.840.0.8c74d3c717df1122811b6f92b2a63f7ba2d707a4.001.1","noaa_urn:oid:2.49.0.1.840.0.5873505ac7958362571989a1b0b9caa3434070d4.002.1","noaa_urn:oid:2.49.0.1.840.0.c217be1124388df01f1a97211a0c8c845e6dbc19.001.1","noaa_urn:oid:2.49.0.1.840.0.de3abe71aa5f60839f8fde4626efd3bb2e99ab20.001.1","noaa_urn:oid:2.49.0.1.840.0.586185630ab6e559df49e64bd510de11d436956a.002.1","noaa_urn:oid:2.49.0.1.840.0.4e13d53e85dd5109f2366d9b12fa82fa6a96f1eb.002.1","noaa_urn:oid:2.49.0.1.840.0.a41c3ed2f856769d6a8bd22d6c4e6fc9e55db769.001.1","noaa_urn:oid:2.49.0.1.840.0.8ce4e72f3a0b818f6359bddd4276ddc380a38242.001.1","noaa_urn:oid:2.49.0.1.840.0.4552aadfc5ead652a01d0045ef8d85b0961c195b.001.1","noaa_urn:oid:2.49.0.1.840.0.5b999f49d2b93fbe4912d71c860ef7c4ed5487b8.002.1","noaa_urn:oid:2.49.0.1.840.0.6bed06d8c8c66319483bf481070f770a6853ef34.001.1"] |
| 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_H_35.960_-81.540_1786474200000","source":"iem","severity":"low","severityValue":25,"timestamp":1786474200000,"latitude":35.96,"longitude":-81.54},{"id":"iem_D_35.730_-81.860_1786478100000","source":"iem","severity":"low","severityValue":25,"timestamp":1786478100000,"latitude":35.73,"longitude":-81.86},{"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_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_35.970_-81.580_1786473600000","source":"iem","severity":"low","severityValue":25,"timestamp":1786473600000,"latitude":35.97,"longitude":-81.58},{"id":"iem_H_35.970_-81.570_1786473600000","source":"iem","severity":"low","severityValue":25,"timestamp":1786473600000,"latitude":35.97,"longitude":-81.57},{"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 near Johnson City?
Calamity.live data shows a weather event with CalamityScore 43/100, near Johnson City (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.