Right now
The most recent data we hold from NOAA arrived 44 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 5 September 2026 at 12:00 UTC. It is kept here as a record.
No stronger detection stands among the 26 recorded within 20 km of this point since 27 March 2026 — 25 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued September 5 at 5:21AM EDT until September 5 at 8:00AM EDT by NWS Wilmington OH
Urban PEI: 1,247,659 within a heuristic 50 km radius; not unique people.
Nearby, since 27 March 2026
- September 10, 2026 · score 46 · 0.0 km
- September 9, 2026 · score 46 · 0.0 km
- September 5, 2026 · score 46 · 0.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 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 v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 46 / 100 |
| Legacy data-support index | 0.82/1 |
| Coordinates | 40.4000, -82.9000 |
| Nearest City | Delaware (18 km) |
| Urban exposure index (PEI) | 1.2M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-05T09:21:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.036e3688c8ad3a61fdc9179a27a7bc2c9ab1211f.002.1 |
Physical priority index · v4 (historical). 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: 2026-09-05T09:21:00.000Z.
First archived: 2026-09-05T10:01:55.873Z. 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 Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Delaware, OH; Fairfield, OH; Franklin, OH; Licking, OH |
| Headline | Severe Thunderstorm Watch issued September 5 at 5:21AM EDT until September 5 at 8:00AM EDT by NWS Wilmington OH |
| Expires | 2026-09-05T08:00:00-04:00 |
| SenderName | NWS Wilmington OH |
| HasExactCoords | false |
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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