Right now
The most recent data we hold from NOAA arrived 66 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 4 July 2026 at 01:45 UTC. It is kept here as a record.
It is the 4th strongest of the 18 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 3 at 9:03PM EDT until July 3 at 9:45PM EDT by NWS Morristown TN
Urban PEI: 29,302 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- July 4, 2026 · score 43 · 17.0 km
How we know
8 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 34 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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) | 34 / 100 |
| Legacy data-support index | 0.91/1 |
| Coordinates | 36.4512, -84.2431 |
| Nearest City | Oak Ridge (49 km) |
| Urban exposure index (PEI) | 29.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T01:03:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.c6457cd8625211351e52ba3a7fd53f40 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-07-04T01:03:00.000Z.
First archived: 2026-07-04T01:09:57.052Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Campbell, TN; Claiborne, TN; Union, TN; Campbell, TN; Campbell, TN; Scott, TN |
| Headline | Severe Thunderstorm Warning issued July 3 at 9:03PM EDT until July 3 at 9:45PM EDT by NWS Morristown TN |
| Expires | 2026-07-03T21:45:00-04:00 |
| SenderName | NWS Morristown TN |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c6457cd8625211351e52ba3a7fd53f40bb7815c8.001.1","noaa_urn:oid:2.49.0.1.840.0.ce09b9b63c12853457e6faa9eb2b5511a29226b6.002.1","noaa_urn:oid:2.49.0.1.840.0.23b7db8d9a5321986d9e40dcfd7026dc932db062.001.1"] |
| 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_36.080_-84.200_1783121700000","source":"iem","severity":"low","severityValue":25,"timestamp":1783121700000,"latitude":36.08,"longitude":-84.2},{"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.
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