Right now
The most recent data we hold from NOAA arrived 2 minutes 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 00:15 UTC. It is kept here as a record.
It is the 59th strongest of the 89 detections recorded within 20 km of this point since 26 April 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 21 at 6:48PM CDT until September 21 at 7:15PM CDT by NWS Mobile AL
Urban PEI: 46,805 within a heuristic 50 km radius; not unique people.
Nearby, since 26 April 2026
- May 26, 2026 · score 34 · 4.4 km
- May 25, 2026 · score 34 · 7.0 km
- June 28, 2026 · score 34 · 12.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 28 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) | 28 / 100 |
| Legacy data-support index | 0.80/1 |
| Coordinates | 31.0467, -89.2248 |
| Nearest City | Hattiesburg (32 km) |
| Urban exposure index (PEI) | 46.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-21T23:48:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.a5ff3614b226d339889ac42ed489bb8172176632.001.1 |
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: 2026-09-21T23:48:00.000Z.
First archived: 2026-09-21T23:52:26.972Z. 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 | Clarke, AL; Wayne, MS; St. Tammany, LA and 2 more areas |
| Headline | Severe Thunderstorm Warning issued September 21 at 6:48PM CDT until September 21 at 7:15PM CDT by NWS Mobile AL |
| Expires | 2026-09-21T19:15:00-05:00 |
| SenderName | NWS Mobile AL |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a5ff3614b226d339889ac42ed489bb8172176632.001.1","noaa_urn:oid:2.49.0.1.840.0.f217b3c71833503ad38bd791c561f94dcd8c7366.001.1","noaa_urn:oid:2.49.0.1.840.0.4b1ac139e02b9d161cb6b09827096cc5a414ed1c.001.1","noaa_urn:oid:2.49.0.1.840.0.360e42243d2f5210bb8bd74d2e3966e9ba71c050.001.1","noaa_urn:oid:2.49.0.1.840.0.ba142097a19acc7cd6c3f31b2ccd6227ba4022dc.001.1"] |
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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