Right now
The most recent data we hold from NOAA arrived 1 minute ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
3 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert expired on 22 September 2026 at 20:30 UTC. It is kept here as a record.
It is the 20th strongest of the 129 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 22 at 2:48PM CDT until September 22 at 3:30PM CDT by NWS Huntsville AL
Urban PEI: 202,078 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- March 16, 2026 · score 43 · 6.6 km
- June 10, 2026 · score 16 · 8.8 km
- August 7, 2026 · score 37 · 14.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 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 v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 37 / 100 |
| Legacy data-support index | 0.79/1 |
| Coordinates | 34.7333, -85.6200 |
| Nearest City | Chattanooga (45 km) |
| Urban exposure index (PEI) | 202.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-22T19:48:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.4b3db60f87341b8b9b2620d4bc70462e622167b3.001.1 |
Physical priority index · v5. 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: 2026-09-22T19:48:00.000Z.
First archived: 2026-09-22T19:51:40.701Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-22T19:57:32.106Z · data_change
Index 37 → 37; severity medium → medium; version 5 → 5.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | DeKalb, AL; Jackson, AL |
| Headline | Severe Thunderstorm Warning issued September 22 at 2:48PM CDT until September 22 at 3:30PM CDT by NWS Huntsville AL |
| Expires | 2026-09-22T15:30:00-05:00 |
| SenderName | NWS Huntsville AL |
| HasExactCoords | true |
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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