Right now
The most recent data we hold from NOAA arrived 15 minutes 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 06:45 UTC. It is kept here as a record.
It is the 6th strongest of the 30 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 1 at 1:06AM CDT until June 1 at 1:45AM CDT by NWS Omaha/Valley NE
Nearby, since 16 March 2026
- May 22, 2026 · score 72 · 13.8 km
- May 16, 2026 · score 22 · 19.9 km
How we know
Confirmed by 4 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 69 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 22 / 100 |
| Our confidence | 69% |
| Coordinates | 41.7209, -95.6473 |
| Nearest City | Council Bluffs (54 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-01T06:06:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.119ef2846b74cb5ba32eee350b706e38 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Harrison, IA; Pottawattamie, IA; Shelby, IA; Harrison, IA; Pottawattamie, IA; Shelby, IA and 1 more areas |
| Headline | Severe Thunderstorm Warning issued June 1 at 1:06AM CDT until June 1 at 1:45AM CDT by NWS Omaha/Valley NE |
| Expires | 2026-06-01T01:45:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.119ef2846b74cb5ba32eee350b706e38e6178b45.001.1","noaa_urn:oid:2.49.0.1.840.0.f4ae2c966e5c299ab31cba458122da99d6dac018.001.1","noaa_urn:oid:2.49.0.1.840.0.ec01a31db17331b7fd791a6ba13aadd03c202071.001.1","noaa_urn:oid:2.49.0.1.840.0.8c3181934b26aa0794d1abe28594bbdbbea0d55a.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_41.300_-96.250_1780281180000","source":"iem","severity":"low","severityValue":25,"timestamp":1780281180000,"latitude":41.3,"longitude":-96.25},{"id":"iem_H_41.300_-96.260_1780280340000","source":"iem","severity":"low","severityValue":25,"timestamp":1780280340000,"latitude":41.3,"longitude":-96.26},{"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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