Right now
The most recent data we hold from NOAA arrived 4 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
2 other detections within 20 km in the last 24 hours, the nearest 14 km from here.
This alert expired on 21 September 2026 at 23:30 UTC. It is kept here as a record.
It is the 9th strongest of the 36 detections recorded within 20 km of this point since 25 April 2026. The last comparable one was on 14 September 2026. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 21 at 5:31PM CDT until September 21 at 6:30PM CDT by NWS New Orleans LA
Urban PEI: 49,991 within a heuristic 50 km radius; not unique people.
Nearby, since 25 April 2026
- June 2, 2026 · score 43 · 7.2 km
- September 14, 2026 · score 28 · 18.5 km
- July 4, 2026 · score 43 · 19.9 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 | 31.9124, -89.8831 |
| Nearest City | Brandon (41 km) |
| Urban exposure index (PEI) | 50.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-21T22:31:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.e8ed720c9e8896fc52b1ca992759f7faa8a705d8.001.1 |
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: 2026-09-21T22:31:00.000Z.
First archived: 2026-09-21T22:36:10.232Z. 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 | Assumption, LA; Iberville, LA; Iberville, LA; Washington, LA and 8 more areas |
| Headline | Severe Thunderstorm Warning issued September 21 at 5:31PM CDT until September 21 at 6:30PM CDT by NWS New Orleans LA |
| Expires | 2026-09-21T18:30:00-05:00 |
| SenderName | NWS New Orleans LA |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e8ed720c9e8896fc52b1ca992759f7faa8a705d8.001.1","noaa_urn:oid:2.49.0.1.840.0.4142920cfb627e577038cddc87db14b1f7275b45.002.1","noaa_urn:oid:2.49.0.1.840.0.ea5690a7200e552bcdaa3006a93f687f1272585b.001.1","noaa_urn:oid:2.49.0.1.840.0.26503355100ac02c82d503cec7e055dbb92573ac.001.1","noaa_urn:oid:2.49.0.1.840.0.657d34972b07f9d6d1bb79ff1223eaa52d0e0b72.001.1","noaa_urn:oid:2.49.0.1.840.0.a4cba9eda19b1229e2051e1697438f14ed1da647.001.1","noaa_urn:oid:2.49.0.1.840.0.aa7d31e1eee622d7abe0a0a37cdb1538569b4cfb.001.1","noaa_urn:oid:2.49.0.1.840.0.db25037d82d559023b995d470a60b8a8fa04294a.001.1","noaa_urn:oid:2.49.0.1.840.0.16128049f2c2c82a7e66470061c4ea9daa872d18.001.1","noaa_urn:oid:2.49.0.1.840.0.6a45b80574c6c4826edbcde9ed918667b4b46017.001.1","noaa_urn:oid:2.49.0.1.840.0.aa27574a060f464937170822268efbac198a6af6.001.1"] |
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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens in this area?