Right now
The most recent data we hold from NOAA arrived 8 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
One other detection within 20 km in the last 24 hours, <1 km from here.
This alert expired on 22 September 2026 at 04:00 UTC. It is kept here as a record.
It is the 3rd strongest of the 5 detections recorded within 20 km of this point since 2 July 2026. The last comparable one was on 14 July 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 21 at 9:53PM CDT until September 21 at 11:00PM CDT by NWS Jackson MS
Urban PEI: 32,156 within a heuristic 50 km radius; not unique people.
Nearby, since 2 July 2026
- July 14, 2026 · score 34 · 14.3 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 | 33.1450, -90.9130 |
| Nearest City | Greenville (32 km) |
| Urban exposure index (PEI) | 32.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-22T02:53:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.163c27350104a7703922bfadc9619aaae8c2da85.001.1 |
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: 2026-09-22T02:53:00.000Z.
First archived: 2026-09-22T02:59:36.267Z. Material modification: 2026-09-22T03:05:01.108Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
2026-09-22T03:21:06.953Z · data_change
Index 28 → 28; severity medium → medium; version 5 → 5.
2026-09-22T03:15:45.969Z · data_change
Index 28 → 28; severity medium → medium; version 5 → 5.
2026-09-22T03:05:01.108Z · data_change
Index 16 → 28; severity medium → medium; version 5 → 5.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Humphreys, MS; Sharkey, MS; Washington, MS; Chicot, AR; Washington, MS |
| Headline | Severe Thunderstorm Warning issued September 21 at 9:53PM CDT until September 21 at 11:00PM CDT by NWS Jackson MS |
| Expires | 2026-09-21T23:00:00-05:00 |
| SenderName | NWS Jackson MS |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.163c27350104a7703922bfadc9619aaae8c2da85.001.1","noaa_urn:oid:2.49.0.1.840.0.27c676765e0ba2b0b19798f412afd1f1e0b31443.001.1"] |
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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