Right now
The most recent data we hold from NOAA arrived 15 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 22 June 2026 at 22:45 UTC. It is kept here as a record.
It is the 5th strongest of the 70 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 22 at 5:56PM EDT until June 22 at 6:45PM EDT by NWS Morristown TN
Urban PEI: 371,216 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- July 10, 2026 · score 43 · 10.9 km
- June 22, 2026 · score 67 · 13.3 km
- March 16, 2026 · score 43 · 17.9 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.82/1 |
| Coordinates | 34.9672, -85.4804 |
| Nearest City | Chattanooga (18 km) |
| Urban exposure index (PEI) | 371.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-22T21:56:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.3af9d095258d8521c9204cba58bf5604 |
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: 2026-06-22T21:56:00.000Z.
First archived: 2026-06-22T22:02:41.934Z. 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 | Hamilton, TN; Marion, TN; Sequatchie, TN; Catoosa, GA; Dade, GA; Walker, GA; Whitfield, GA; DeKalb, AL; Jackson, AL and 1 more areas |
| Headline | Severe Thunderstorm Warning issued June 22 at 5:56PM EDT until June 22 at 6:45PM EDT by NWS Morristown TN |
| Expires | 2026-06-22T18:45:00-04:00 |
| SenderName | NWS Morristown TN |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.3af9d095258d8521c9204cba58bf560407750fac.001.1","noaa_urn:oid:2.49.0.1.840.0.851bd69d0e4ccfe0396e761a98d0156ae3d082a6.001.1","noaa_urn:oid:2.49.0.1.840.0.819a93d5205e7df0ba152962db12f7da00fc4337.001.1","noaa_urn:oid:2.49.0.1.840.0.b9d04c63776cf873637cd912eb8d73fa92c6782d.001.1"] |
| Iem TypeSummary | D |
| Iem City | 1 E Chattanooga |
| Iem County | Hamilton |
| Iem State | TN |
| Iem Wfo | MRX |
| Iem Remark | Tree(s) reported down on Campbell St. Timing based on radar. |
| MergedSources | [{"id":"iem_D_35.070_-85.240_1782158220000","source":"iem","severity":"low","severityValue":25,"timestamp":1782158220000,"latitude":35.07,"longitude":-85.24}] |
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.
Review the area, threshold and delivery channel in your account.
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