Right now
The most recent data we hold from NOAA arrived 34 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 21:30 UTC. It is kept here as a record.
It is the 3rd strongest of the 55 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 22 at 3:27PM CDT until June 22 at 4:30PM CDT by NWS Huntsville AL
Urban PEI: 371,216 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- March 16, 2026 · score 43 · 5.4 km
- July 3, 2026 · score 43 · 11.5 km
- June 9, 2026 · score 37 · 16.7 km
How we know
5 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 | 0.87/1 |
| Coordinates | 35.0396, -85.6531 |
| Nearest City | Chattanooga (31 km) |
| Urban exposure index (PEI) | 371.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-22T20:27:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.d7df874a3de734a214274cf2ede56d59 |
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: 2026-06-22T20:27:00.000Z.
First archived: 2026-06-22T20:34:21.126Z. 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 | Jackson, AL; Lawrence, AL; Limestone, AL; Madison, AL; Lincoln, TN; Bradley, TN; Polk, TN |
| Headline | Severe Thunderstorm Warning issued June 22 at 3:27PM CDT until June 22 at 4:30PM CDT by NWS Huntsville AL |
| Expires | 2026-06-22T16:30:00-05:00 |
| SenderName | NWS Huntsville AL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d7df874a3de734a214274cf2ede56d59ad81dd1f.001.1","noaa_urn:oid:2.49.0.1.840.0.ce4c00e52fe3eb68955c358821da22c124718125.001.1"] |
| 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_34.710_-85.740_1782158040000","source":"iem","severity":"low","severityValue":25,"timestamp":1782158040000,"latitude":34.71,"longitude":-85.74},{"id":"iem_D_34.980_-85.680_1782157200000","source":"iem","severity":"low","severityValue":25,"timestamp":1782157200000,"latitude":34.98,"longitude":-85.68},{"id":"iem_D_34.570_-86.140_1782158040000","source":"iem","severity":"low","severityValue":25,"timestamp":1782158040000,"latitude":34.57,"longitude":-86.14},{"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.
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