This alert expired on 4 July 2026 at 01:15 UTC. It is kept here as a record.
No stronger detection stands among the 22 recorded within 20 km of this point since 16 March 2026 — 6 others scored the same. The last comparable one was on 28 June 2026. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 3 at 8:35PM EDT until July 3 at 9:15PM EDT by NWS Morristown TN
An estimated 241,961 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 28, 2026 · score 43 · 6.3 km
- July 8, 2026 · score 43 · 17.8 km
- July 5, 2026 · score 43 · 21.4 km
How we know
Confirmed by 7 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 | 36.3067, -84.1800 |
| Nearest City | Oak Ridge (34 km) |
| Population Exposed | 242.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T00:35:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.e53a5370bdb38e789980209ca08846c6df59774e.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Anderson, TN; Campbell, TN |
| Headline | Severe Thunderstorm Warning issued July 3 at 8:35PM EDT until July 3 at 9:15PM EDT by NWS Morristown TN |
| Expires | 2026-07-03T21:15:00-04:00 |
| SenderName | NWS Morristown TN |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 0.75 |
| Iem Unit | Inch |
| Iem City | 6 NE Oak Ridge |
| Iem County | Anderson |
| Iem State | TN |
| Iem Wfo | MRX |
| Iem Remark | Brief power loss accompanying the hail. |
| MergedSources | [{"id":"iem_D_36.360_-84.880_1783122720000","source":"iem","severity":"low","severityValue":25,"timestamp":1783122720000,"latitude":36.36,"longitude":-84.88},{"id":"iem_H_36.110_-84.170_1783122000000","source":"iem","severity":"low","severityValue":25,"timestamp":1783122000000,"latitude":36.11,"longitude":-84.17},{"id":"iem_H_36.080_-84.200_1783120740000","source":"iem","severity":"low","severityValue":25,"timestamp":1783120740000,"latitude":36.08,"longitude":-84.2},{"id":"iem_H_35.980_-84.410_1783119120000","source":"iem","severity":"low","severityValue":25,"timestamp":1783119120000,"latitude":35.98,"longitude":-84.41},{"id":"iem_D_36.010_-84.270_1783120200000","source":"iem","severity":"low","severityValue":25,"timestamp":1783120200000,"latitude":36.01,"longitude":-84.27},{"id":"iem_H_36.020_-84.220_1783118400000","source":"iem","severity":"low","severityValue":25,"timestamp":1783118400000,"latitude":36.02,"longitude":-84.22}] |
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.