This alert expired on 11 June 2026 at 10:45 UTC. It is kept here as a record.
It is the 7th strongest of the 36 detections recorded within 20 km of this point since 15 May 2026. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 11 at 4:51AM CDT until June 11 at 5:45AM CDT by NWS Omaha/Valley NE
An estimated 386,698 people live within 50 km of this point.
Nearby, since 15 May 2026
- June 6, 2026 · score 41 · 10.4 km
- June 11, 2026 · score 67 · 15.5 km
- May 18, 2026 · score 48 · 17.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 81 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 81% |
| Coordinates | 40.7404, -96.0843 |
| Nearest City | Papillion (46 km) |
| Population Exposed | 386.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-11T09:51:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.f389af5f5c6675b7beac700aab151b63 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Fremont, IA; Cass, NE; Otoe, NE; Cass, NE; Otoe, NE; Atchison, MO and 3 more areas |
| Headline | Severe Thunderstorm Warning issued June 11 at 4:51AM CDT until June 11 at 5:45AM CDT by NWS Omaha/Valley NE |
| Expires | 2026-06-11T05:45:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f389af5f5c6675b7beac700aab151b637b2a9123.001.1","noaa_urn:oid:2.49.0.1.840.0.f0c90ab234608e7cdc1d461ea3d169d32c6cc1ac.001.1","noaa_urn:oid:2.49.0.1.840.0.bc146e07291070a870c4a3bd73ab4524eb4923df.001.1","noaa_urn:oid:2.49.0.1.840.0.e5a1018b6f7a62bd159440b3b318f8aa2a63dc2d.001.1","noaa_urn:oid:2.49.0.1.840.0.fd865715a73ef0b125ae16a8bd2640d177ad58f8.001.1","noaa_urn:oid:2.49.0.1.840.0.a956e31b8c4d964d34ae82d03c0c2c3d46021e27.001.1"] |
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 10 February 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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.