Right now
The most recent data we hold from NOAA arrived 2 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.
This alert expired on 1 June 2026 at 07:30 UTC. It is kept here as a record.
It is the 9th strongest of the 21 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 1 at 1:32AM CDT until June 1 at 2:30AM CDT by NWS Omaha/Valley NE
Urban PEI: 62,597 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- July 9, 2026 · score 72 · 8.4 km
- April 23, 2026 · score 48 · 16.3 km
- September 9, 2026 · score 16 · 17.4 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 39 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 v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 39 / 100 |
| Legacy data-support index | 0.84/1 |
| Coordinates | 41.4864, -95.3602 |
| Nearest City | Council Bluffs (49 km) |
| Urban exposure index (PEI) | 62.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-01T06:32:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.b267e36b12245386afca5a7792458511 |
Physical priority index · v1. 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: 2026-06-01T06:32:00.000Z.
First archived: 2026-06-01T06:35:01.455Z. 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 | Pottawattamie, IA; Shelby, IA; Harrison, IA; Pottawattamie, IA; Shelby, IA |
| Headline | Severe Thunderstorm Warning issued June 1 at 1:32AM CDT until June 1 at 2:30AM CDT by NWS Omaha/Valley NE |
| Expires | 2026-06-01T02:30:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b267e36b12245386afca5a7792458511f3fb1781.001.1","noaa_urn:oid:2.49.0.1.840.0.f09d12e01b4827a9449c707e1825ed7493121bc3.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | Woodbine |
| Iem County | Harrison |
| Iem State | IA |
| Iem Wfo | OAX |
| MergedSources | [{"id":"iem_H_41.740_-95.710_1780289760000","source":"iem","severity":"low","severityValue":25,"timestamp":1780289760000,"latitude":41.74,"longitude":-95.71}] |
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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