Right now
The most recent data we hold from SPC arrived 21 hours 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.
Reported by SPC 5 days ago.
No stronger detection stands among the 17 recorded within 20 km of this point since 17 March 2026 — 14 others scored the same. Another comparable one was recorded here earlier the same day. 16 more were recorded here in the fortnight before it.
What the source measured
SPC reported: Wind 77 kt near 9 NNE Cainsville, Mercer, MO. Personal weather station. (EAX)
Nearby, since 17 March 2026
- September 20, 2026 · score 28 · 0.0 km
- June 10, 2026 · 6.2 km
- June 13, 2026 · 12.1 km
How we know
2 recorded sources include SPC; independence is not established by this count.
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 | High |
| Calamity Score (ours) | 28 / 100 |
| Legacy data-support index | 0.56/1 |
| Coordinates | 40.5700, -93.7300 |
| Nearest City | Indianola (89 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-09-20T00:44:00.000Z |
| 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: 2026-09-20T00:44:00.000Z.
First archived: 2026-09-20T03:20:58.484Z. 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 | 77 |
| Location | 9 NNE Cainsville |
| County | Mercer |
| State | MO |
| Comments | Personal weather station. (EAX) |
| Iem TypeSummary | G |
| Iem Magnitude | 77 |
| Iem Unit | MPH |
| Iem City | 9 NNE Cainsville |
| Iem County | Mercer |
| Iem State | MO |
| Iem Wfo | EAX |
| Iem Remark | Personal weather station. |
| MergedSources | [{"id":"iem_G_40.570_-93.730_1789865040000","source":"iem","severity":"low","severityValue":25,"timestamp":1789865040000,"latitude":40.57,"longitude":-93.73}] |
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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