Right now
The most recent data we hold from NOAA arrived 75 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
14 other detections within 20 km in the last 24 hours, the nearest 3 km from here.
This alert expired on 15 September 2026 at 01:15 UTC. It is kept here as a record.
It is the 40th strongest of the 71 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 14 at 8:01PM CDT until September 14 at 8:15PM CDT by NWS Omaha/Valley NE
Nearby, since 16 March 2026
- June 13, 2026 · score 48 · 20.5 km
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 16 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) | 16 / 100 |
| Legacy data-support index | 0.71/1 |
| Coordinates | 41.0155, -95.2501 |
| Nearest City | Bellevue (55 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-09-15T01:01:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.7d7eafd23e8bc35cae32a5c21087ffd47b1c3b31.001.1 |
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: 2026-09-15T01:01:00.000Z.
First archived: 2026-09-15T01:08:44.786Z. 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 | Montgomery, IA; Fremont, IA; Johnson, NE; Nemaha, NE; Otoe, NE; Adair, IA; Audubon, IA; Cass, IA; Guthrie, IA |
| Headline | Severe Thunderstorm Warning issued September 14 at 8:01PM CDT until September 14 at 8:15PM CDT by NWS Omaha/Valley NE |
| Expires | 2026-09-14T20:15:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.7d7eafd23e8bc35cae32a5c21087ffd47b1c3b31.001.1","noaa_urn:oid:2.49.0.1.840.0.cfbfec246df220b2021e394ac9cbad28e3d76372.001.1","noaa_urn:oid:2.49.0.1.840.0.e253adfc08e0cbd49f239f27734beae7e26a6852.001.1"] |
| Spc ReportType | wind |
| Spc Speed | 58 |
| Spc Location | 5 W Treynor |
| Spc County | Pottawattamie |
| Spc State | IA |
| Spc Comments | Personal weather station. (OAX) |
| Iem TypeSummary | G |
| Iem Magnitude | 58 |
| Iem Unit | MPH |
| Iem City | 5 W Treynor |
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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