Right now
The most recent data we hold from NOAA arrived 5 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 18 May 2026 at 01:00 UTC. It is kept here as a record.
It is the 5th strongest of the 34 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 17 at 7:36PM CDT until May 17 at 8:00PM CDT by NWS Omaha/Valley NE
An estimated 294,757 people live within 50 km of this point.
Nearby, since 16 March 2026
- April 15, 2026 · score 43 · 9.9 km
- August 19, 2026 · score 43 · 17.5 km
- April 25, 2026 · score 43 · 20.4 km
How we know
Confirmed by 10 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 90 % 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) | 43 / 100 |
| Our confidence | 90% |
| Coordinates | 41.0634, -96.9376 |
| Nearest City | Lincoln (37 km) |
| Population Exposed | 294.8K within 50 km |
| Impact Tier | significant |
| Date | 2026-05-18 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.36b2004e1d39c314f79d82aade28a4ea |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Gage, NE; Jefferson, NE; Washington, KS; Cloud, KS and 20 more areas |
| Headline | Severe Thunderstorm Warning issued May 17 at 7:36PM CDT until May 17 at 8:00PM CDT by NWS Omaha/Valley NE |
| Expires | 2026-05-17T20:00:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| MergedCount | 23 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.36b2004e1d39c314f79d82aade28a4eae9bc7dee.001.1","noaa_urn:oid:2.49.0.1.840.0.155ffd32460efdff10a88df53aa46ee205f5da12.001.1","noaa_urn:oid:2.49.0.1.840.0.db7d42c84eecd602d92a9cd1027fa9ffb09fcc44.001.1","noaa_urn:oid:2.49.0.1.840.0.f56d618dbc6a2384782944ad0b83dc660206e27f.002.1","noaa_urn:oid:2.49.0.1.840.0.fbcc19a14484924b435fa631c94a35b89b613db4.002.1","noaa_urn:oid:2.49.0.1.840.0.fb0647708b6b217e0b91dd28e2cc2223737d3c7f.001.1","noaa_urn:oid:2.49.0.1.840.0.579f6e89124271c113b082f4499eef0959ddc02b.001.1","noaa_urn:oid:2.49.0.1.840.0.37cf1f05f8478fe924c6a0f48be9009ea1bc77ab.001.1","noaa_urn:oid:2.49.0.1.840.0.f637a71e0845169941468ef399a9ae3a2140581e.001.1","noaa_urn:oid:2.49.0.1.840.0.ea40d5d677b26e4c243bdd2bd568a662c2d004c6.001.1","noaa_urn:oid:2.49.0.1.840.0.bcc19861a2e398bf1a90dce975ee8b347a2addfe.001.1","noaa_urn:oid:2.49.0.1.840.0.56d65eeb241bba5d6cd933cf83fe4a9321f8bbc8.001.1","noaa_urn:oid:2.49.0.1.840.0.f3e29a74d6e271116a3fd283f82e373f27e2ff17.001.1","noaa_urn:oid:2.49.0.1.840.0.29399f3214f0d992b0d8497529d34a31393a639d.001.1","noaa_urn:oid:2.49.0.1.840.0.0b18dcca6b9f94570ab0219b155118e2f64697f4.001.1","noaa_urn:oid:2.49.0.1.840.0.b477fa7464964465907d29a22d386d1fd838310b.001.1","noaa_urn:oid:2.49.0.1.840.0.c83a8a4e9da708368c22681da5b7c4d2ab42f04a.001.1","noaa_urn:oid:2.49.0.1.840.0.3d82d0c54865a2aaf33fa6cec9ac4bdea722d399.001.1","noaa_urn:oid:2.49.0.1.840.0.838fd0160f83584e2155ef4181f3a6c9a588179f.001.1","noaa_urn:oid:2.49.0.1.840.0.4c0695ff5786370f3033746f9b4e9e27ff9e0860.002.1","noaa_urn:oid:2.49.0.1.840.0.1026a9f402f850ede9bb1febbc2179a07da8fe74.002.1","noaa_urn:oid:2.49.0.1.840.0.221a4dc86f86dd99b846cae657c640093db227c2.002.1","noaa_urn:oid:2.49.0.1.840.0.a7f8514dad92de120fbefb143a3140b44ca62ab3.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | Clarkson |
| Iem County | Colfax |
| Iem State | NE |
| Iem Wfo | OAX |
| Google News RssFeed | weather |
| Google News SourceName | KOLN | Nebraska Local News, Weather, Sports | Lincoln, NE |
| MergedSources | [{"id":"iem_D_40.650_-97.280_1779060900000","source":"iem","severity":"low","severityValue":25,"timestamp":1779060900000,"latitude":40.65,"longitude":-97.28},{"id":"iem_G_41.600_-97.300_1779060540000","source":"iem","severity":"low","severityValue":25,"timestamp":1779060540000,"latitude":41.6,"longitude":-97.3},{"id":"iem_G_41.560_-97.460_1779060000000","source":"iem","severity":"low","severityValue":25,"timestamp":1779060000000,"latitude":41.56,"longitude":-97.46},{"id":"iem_G_41.400_-97.600_1779059640000","source":"iem","severity":"low","severityValue":25,"timestamp":1779059640000,"latitude":41.4,"longitude":-97.6},{"id":"iem_G_41.290_-97.740_1779059700000","source":"iem","severity":"low","severityValue":25,"timestamp":1779059700000,"latitude":41.29,"longitude":-97.74},{"id":"iem_G_41.460_-96.800_1779063240000","source":"iem","severity":"low","severityValue":25,"timestamp":1779063240000,"latitude":41.46,"longitude":-96.8},{"id":"iem_H_41.720_-97.120_1779060960000","source":"iem","severity":"low","severityValue":25,"timestamp":1779060960000,"latitude":41.72,"longitude":-97.12},{"id":"gnews_weather_494179_136","source":"google_news","severity":"medium","severityValue":40,"timestamp":1779044640000,"latitude":40.8,"longitude":-96.67},{"id":"gnews_weather_494179_153","source":"google_news","severity":"medium","severityValue":40,"timestamp":1779045572000,"latitude":40.8,"longitude":-96.67}] |
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.
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.