Right now
The most recent data we hold from SPC arrived 4 hours ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Reported by SPC 3 days ago.
What the source measured
SPC reported: Wind UNK kt near 1 SE Bellbrook, Greene, OH. Several trees were downed in the Bellbrook area. Time estimated from radar. (ILN)
Urban PEI: 711,012 within a heuristic 50 km radius; not unique people.
How we know
2 recorded sources include SPC; independence is not established by this count.
Our own score for this event is 41 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) | 41 / 100 |
| Legacy data-support index | 0.73/1 |
| Coordinates | 39.6300, -84.0600 |
| Nearest City | Centerville (9 km) |
| Urban exposure index (PEI) | 711.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-21T00:17:00.000Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
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: spc. Occurrence: 2026-09-21T00:17:00.000Z.
First archived: 2026-09-21T12:05:07.100Z. 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
| ReportType | wind |
| Speed | UNK |
| Location | 1 SE Bellbrook |
| County | Greene |
| State | OH |
| Comments | Several trees were downed in the Bellbrook area. Time estimated from radar. (ILN) |
| Iem TypeSummary | E |
| Iem City | 1 NNE Xenia |
| Iem County | Greene |
| Iem State | OH |
| Iem Wfo | ILN |
| Iem Remark | One foot of water over Marshall Road in Xenia. |
| MergedSources | [{"id":"iem_E_39.680_-83.930_1789967400000","source":"iem","severity":"low","severityValue":25,"timestamp":1789967400000,"latitude":39.68,"longitude":-83.93},{"id":"iem_E_39.630_-84.060_1789967400000","source":"iem","severity":"low","severityValue":25,"timestamp":1789967400000,"latitude":39.63,"longitude":-84.06},{"id":"iem_F_39.440_-83.830_1789953300000","source":"iem","severity":"low","severityValue":25,"timestamp":1789953300000,"latitude":39.44,"longitude":-83.83},{"id":"iem_D_39.630_-84.060_1789949820000","source":"iem","severity":"low","severityValue":25,"timestamp":1789949820000,"latitude":39.63,"longitude":-84.06},{"id":"iem_E_39.690_-83.920_1789953480000","source":"iem","severity":"low","severityValue":25,"timestamp":1789953480000,"latitude":39.69,"longitude":-83.92}] |
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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