Right now
The most recent data we hold from SPC arrived 18 hours ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
44 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
Reported by SPC today.
It is the 9th strongest of the 64 detections recorded within 20 km of this point since 1 June 2026. Another comparable one was recorded here earlier the same day. 22 more were recorded here in the fortnight before it.
What the source measured
SPC reported: Wind UNK kt near Montevallo, Shelby, AL. Public photos on social media show a tree fell and damaged the roof on a building along with taking down power lines in Montevallo. Time and location approximate. (BMX)
Urban PEI: 478,074 within a heuristic 50 km radius; not unique people.
Nearby, since 1 June 2026
- September 23, 2026 · score 37 · 0.0 km
- September 22, 2026 · score 37 · 7.1 km
- September 21, 2026 · score 37 · 7.1 km
How we know
2 recorded sources include SPC; independence is not established by this count.
Our own score for this event is 37 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) | 37 / 100 |
| Legacy data-support index | 0.76/1 |
| Coordinates | 33.1000, -86.8600 |
| Nearest City | Alabaster (16 km) |
| Urban exposure index (PEI) | 478.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-23T01:23:31.736Z |
| 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: 2026-09-23T01:23:31.736Z.
First archived: 2026-09-23T01:20:19.130Z. Material modification: 2026-09-23T01:25:47.302Z.
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 | Montevallo |
| County | Shelby |
| State | AL |
| Comments | Public photos on social media show a tree fell and damaged the roof on a building along with taking down power lines in Montevallo. Time and location approximate. (BMX) |
| Iem TypeSummary | D |
| Iem City | Montevallo |
| Iem County | Shelby |
| Iem State | AL |
| Iem Wfo | BMX |
| Iem Remark | Public photos on social media show a large pine tree fell and downed power lines near the intersection of Main Street and North Boundary Street in Montevallo. Time and location approximate. |
| MergedSources | [{"id":"iem_D_33.100_-86.860_1790119260000","source":"iem","severity":"low","severityValue":25,"timestamp":1790119260000,"latitude":33.1,"longitude":-86.86}] |
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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