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.
One other detection within 20 km in the last 24 hours, 24 km from here.
This alert expired on 5 September 2026 at 17:15 UTC. It is kept here as a record.
It is the 23rd strongest of the 32 detections recorded within 20 km of this point since 5 July 2026. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 5 at 12:27PM EDT until September 5 at 1:15PM EDT by NWS Morristown TN
An estimated 181,004 people live within 50 km of this point.
Nearby, since 5 July 2026
- August 11, 2026 · score 43 · 15.1 km
- July 28, 2026 · score 67 · 15.8 km
- August 4, 2026 · score 43 · 16.2 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 37 out of 100, at 86 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 37 / 100 |
| Our confidence | 86% |
| Coordinates | 36.4025, -82.1491 |
| Nearest City | Johnson City (21 km) |
| Population Exposed | 181.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-05T16:27:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.9470b154f712db97db0cc02d9d65cf5a2ec90a5c.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Carter, TN; Cocke, TN; Greene, TN; Jefferson, TN; Unicoi, TN; Washington, TN; Carter, TN; Greene, TN; Sullivan, TN; Washington, TN; Carroll, VA; Floyd, VA; Grayson, VA; Patrick, VA; Pulaski, VA; Smyth, VA; Wythe, VA; City of Galax, VA |
| Headline | Severe Thunderstorm Warning issued September 5 at 12:27PM EDT until September 5 at 1:15PM EDT by NWS Morristown TN |
| Expires | 2026-09-05T13:15:00-04:00 |
| SenderName | NWS Morristown TN |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.9470b154f712db97db0cc02d9d65cf5a2ec90a5c.001.1","noaa_urn:oid:2.49.0.1.840.0.e58f75ef42f842d5c4ad3a6d0b59b7b6ea98a578.002.1","noaa_urn:oid:2.49.0.1.840.0.ba55a9ee446678c2673c1d1439ee8df834499199.002.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 2 NE Rogersville |
| Spc County | Hawkins |
| Spc State | TN |
| Spc Comments | Several trees down across the county. (MRX) |
| MergedSources | [{"id":"spc_wind_36.81_-82.20_11","source":"spc","severity":"medium","severityValue":45,"timestamp":1788621840000,"latitude":36.81,"longitude":-82.2},{"id":"spc_wind_36.77_-81.65_12","source":"spc","severity":"medium","severityValue":45,"timestamp":1788623220000,"latitude":36.77,"longitude":-81.65},{"id":"spc_wind_36.43_-82.98_13","source":"spc","severity":"medium","severityValue":45,"timestamp":1788623760000,"latitude":36.43,"longitude":-82.98}] |
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 37/100, near Johnson City (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.