Right now
The most recent data we hold from NOAA arrived 35 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
22 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
This alert expired on 15 September 2026 at 02:30 UTC. It is kept here as a record.
It is the 8th strongest of the 41 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 14 at 9:16PM CDT until September 14 at 9:30PM CDT by NWS Omaha/Valley NE
Nearby, since 16 March 2026
- July 4, 2026 · score 22 · 4.8 km
- June 4, 2026 · score 46 · 7.0 km
- September 15, 2026 · score 72 · 25.6 km
How we know
4 recorded sources include NOAA; 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 | 0.71/1 |
| Coordinates | 40.6553, -95.6389 |
| Nearest City | Bellevue (58 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-09-15T02:16:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.1fd2edee6af5e68121e6339d1f9a428fd4f495a1.001.1 |
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: 2026-09-15T02:16:00.000Z.
First archived: 2026-09-15T02:22:50.339Z. 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; Page, IA; Johnson, NE |
| Headline | Severe Thunderstorm Warning issued September 14 at 9:16PM CDT until September 14 at 9:30PM CDT by NWS Omaha/Valley NE |
| Expires | 2026-09-14T21:30:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1fd2edee6af5e68121e6339d1f9a428fd4f495a1.001.1","noaa_urn:oid:2.49.0.1.840.0.037225755622e72c5c345c4f24b5263133e74559.002.1"] |
| Spc ReportType | wind |
| Spc Speed | 62 |
| Spc Location | 3 ENE Essex |
| Spc County | Page |
| Spc State | IA |
| Spc Comments | Personal Weather Station. (OAX) |
| Iem TypeSummary | G |
| Iem Magnitude | 62 |
| Iem Unit | MPH |
| Iem City | 3 ENE Essex |
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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