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.
5 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert expired on 19 September 2026 at 21:31 UTC. It is kept here as a record.
It is the 17th strongest of the 56 detections recorded within 20 km of this point since 11 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 19 at 5:23PM EDT until September 19 at 5:30PM EDT by NWS Wilmington OH
Urban PEI: 86,537 within a heuristic 50 km radius; not unique people.
Nearby, since 11 March 2026
- September 19, 2026 · score 37 · 3.6 km
- March 12, 2026 · score 39 · 4.2 km
- July 21, 2026 · score 32 · 5.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 32 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) | 32 / 100 |
| Legacy data-support index | 0.78/1 |
| Coordinates | 39.4712, -82.4863 |
| Nearest City | Lancaster (28 km) |
| Urban exposure index (PEI) | 86.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-19T21:23:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.01d4678984d2a63c7d63144b9f68af7616055efe.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: 2026-09-19T21:23:00.000Z.
First archived: 2026-09-19T21:28:36.315Z. 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 | Fairfield, OH; Hocking, OH; Fairfield, OH; Hocking, OH; Ross, OH; Athens, OH; Jackson, OH; Meigs, OH; Perry, OH; Vinton, OH |
| Headline | Severe Thunderstorm Warning issued September 19 at 5:23PM EDT until September 19 at 5:30PM EDT by NWS Wilmington OH |
| Expires | 2026-09-19T17:31:00-04:00 |
| SenderName | NWS Wilmington OH |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.01d4678984d2a63c7d63144b9f68af7616055efe.001.1","noaa_urn:oid:2.49.0.1.840.0.a82bed42faed9a5dcbfd8636a9361d5a9461d5f0.001.1","noaa_urn:oid:2.49.0.1.840.0.c79967271ef28feab5c36d29121c5c36402d4447.001.1"] |
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.
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