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.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 16 March 2026 at 10:00 UTC. It is kept here as a record.
No stronger detection stands among the 54 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. 11 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Watch issued March 16 at 1:02AM EDT until March 16 at 6:00AM EDT by NWS Morristown TN
Urban PEI: 278,730 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- July 28, 2026 · score 43 · 0.0 km
- July 27, 2026 · score 43 · 0.0 km
- July 22, 2026 · score 43 · 0.0 km
How we know
8 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 55 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 | High |
| Calamity Score (ours) | 55 / 100 |
| Legacy data-support index | 0.88/1 |
| Coordinates | 35.5000, -86.6000 |
| Nearest City | Shelbyville (13 km) |
| Urban exposure index (PEI) | 278.7K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-03-16T05:02:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Watch_noaa_urn:oid:2.49.0.1.840.0.6e2f204af2a1db0fa695c1df8809405c |
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: 2026-03-16T05:02:00.000Z.
First archived: 2026-03-16T08:21:19.721Z. 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 | Tornado Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | McMinn, TN; Monroe, TN; Polk, TN; Bledsoe, TN; Bradley, TN; Hamilton, TN; Marion, TN; Meigs, TN; Morgan, TN; Rhea, TN; Sequatchie, TN |
| Headline | Tornado Watch issued March 16 at 1:02AM EDT until March 16 at 6:00AM EDT by NWS Morristown TN |
| Expires | 2026-03-16T06:00:00-04:00 |
| SenderName | NWS Morristown TN |
| HasExactCoords | false |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6e2f204af2a1db0fa695c1df8809405c98e43fe3.001.1","noaa_urn:oid:2.49.0.1.840.0.6e2f204af2a1db0fa695c1df8809405c98e43fe3.002.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 7 NNE Harvest |
| Spc County | Madison |
| Spc State | AL |
| Spc Comments | Tree down at this location. (HUN) |
| Iem TypeSummary | D |
| Iem City | Columbia |
| Iem County | Maury |
| Iem State | TN |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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.
Review the area, threshold and delivery channel in your account.
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