Right now
The most recent data we hold from NOAA arrived 10 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
9 other detections within 20 km in the last 24 hours, the nearest 7 km from here.
This alert expired on 13 August 2026 at 03:45 UTC. It is kept here as a record.
It is the 4th strongest of the 45 detections recorded within 20 km of this point since 17 March 2026. Another comparable one was recorded here earlier the same day. 15 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 12 at 11:29PM EDT until August 12 at 11:45PM EDT by NWS Morristown TN
An estimated 162,848 people live within 50 km of this point.
Nearby, since 17 March 2026
- August 11, 2026 · score 43 · 9.7 km
- August 4, 2026 · score 43 · 10.9 km
- August 12, 2026 · score 43 · 14.0 km
How we know
Confirmed by 3 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 | 36.4250, -82.3783 |
| Nearest City | Johnson City (13 km) |
| Population Exposed | 162.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-13T03:29:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.175087a0080743beded1cd805e353be1ae39807f.002.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Carter, TN; Sullivan, TN; Washington, TN; Scott, VA; Washington, VA; City of Bristol, VA |
| Headline | Severe Thunderstorm Warning issued August 12 at 11:29PM EDT until August 12 at 11:45PM EDT by NWS Morristown TN |
| Expires | 2026-08-12T23:45:00-04:00 |
| SenderName | NWS Morristown TN |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 62 |
| Iem Unit | MPH |
| Iem City | 3 S Okolona |
| Iem County | Hawkins |
| Iem State | TN |
| Iem Wfo | MRX |
| Iem Remark | Public reported losing power as home weather station gusted to 62 mph. |
| MergedSources | [{"id":"iem_D_36.540_-82.660_1786590060000","source":"iem","severity":"low","severityValue":25,"timestamp":1786590060000,"latitude":36.54,"longitude":-82.66},{"id":"iem_G_36.540_-82.780_1786589640000","source":"iem","severity":"low","severityValue":25,"timestamp":1786589640000,"latitude":36.54,"longitude":-82.78}] |
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.