Right now
The most recent data we hold from NOAA arrived 4 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 00:45 UTC. It is kept here as a record.
It is the 2nd strongest of the 14 detections recorded within 20 km of this point since 15 April 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 May 17 at 6:39PM CDT until May 17 at 7:45PM CDT by NWS Omaha/Valley NE
Urban PEI: 22,797 within a heuristic 50 km radius; not unique people.
Nearby, since 15 April 2026
- May 17, 2026 · score 58 · 3.5 km
- May 18, 2026 · score 34 · 13.6 km
- July 9, 2026 · score 34 · 22.0 km
How we know
11 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 34 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) | 34 / 100 |
| Legacy data-support index | 0.90/1 |
| Coordinates | 41.1822, -97.2780 |
| Nearest City | Columbus (29 km) |
| Urban exposure index (PEI) | 22.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-17T23:39:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.7023ddf5bf3989c20292a1cabd74a1a2 |
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: 2026-05-17T23:39:00.000Z.
First archived: 2026-05-17T23:40:56.954Z. 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 | Burt, NE; Cuming, NE; Dodge, NE; Stanton, NE; Thurston, NE; Wayne, NE; Madison, NE; Platte, NE; Stanton, NE; Hamilton, NE; Polk, NE; York, NE and 13 more areas |
| Headline | Severe Thunderstorm Warning issued May 17 at 6:39PM CDT until May 17 at 7:45PM CDT by NWS Omaha/Valley NE |
| Expires | 2026-05-17T19:45:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| MergedCount | 16 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.7023ddf5bf3989c20292a1cabd74a1a240b086cc.001.1","noaa_urn:oid:2.49.0.1.840.0.eecf5d27219a79c7d9bbdb1864514925012d6847.001.1","noaa_urn:oid:2.49.0.1.840.0.5a883d8dc048e50e82153d346267c75cb1907974.001.1","noaa_urn:oid:2.49.0.1.840.0.1fd09a9de29a3d67872072fbbe9a0a890233022d.001.1","noaa_urn:oid:2.49.0.1.840.0.7c76af721de766959b441e61c608292063044d13.001.1","noaa_urn:oid:2.49.0.1.840.0.e4b902ba4eac18de4f31eda76116757fa2cf012e.001.1","noaa_urn:oid:2.49.0.1.840.0.be2cc06f6dccea25e30a04c9fc22611d72264d49.001.1","noaa_urn:oid:2.49.0.1.840.0.fa70d96f2d0f7b53ef451e09636c86e4f51cf246.001.1","noaa_urn:oid:2.49.0.1.840.0.12aa493d08ffc904d153a188b215067e6f090961.001.1","noaa_urn:oid:2.49.0.1.840.0.e6009a18e281d237f5e480156880fd4223ccb3cf.001.1","noaa_urn:oid:2.49.0.1.840.0.9a25b11adeb335381d605379418dd4917a77c0ca.001.1","noaa_urn:oid:2.49.0.1.840.0.944cde6ba17cdb2a63dbce5c3c10cdbdded1d7f7.001.1","noaa_urn:oid:2.49.0.1.840.0.4b65a217d7606f810329c06cf3e635e521a151c9.001.1","noaa_urn:oid:2.49.0.1.840.0.d30f59e220cd16e4ff8ba72b0ef00dbefeb61eb8.001.1","noaa_urn:oid:2.49.0.1.840.0.c29277358e92fdb9733ae691aa3b6679bb7777b9.001.1","noaa_urn:oid:2.49.0.1.840.0.4263dd4eab6e815a8d5be25839b5269b3af221c8.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 53 |
| Iem Unit | MPH |
| Iem City | 5 SW Silver Creek |
| Iem County | Merrick |
| Iem State | NE |
| Iem Wfo | GID |
| Google News RssFeed | weather |
| Google News SourceName | Lincoln Journal Star |
| MergedSources | [{"id":"iem_D_41.360_-97.980_1779059280000","source":"iem","severity":"low","severityValue":25,"timestamp":1779059280000,"latitude":41.36,"longitude":-97.98},{"id":"iem_H_41.360_-97.980_1779058800000","source":"iem","severity":"low","severityValue":25,"timestamp":1779058800000,"latitude":41.36,"longitude":-97.98},{"id":"iem_G_40.550_-97.560_1779059700000","source":"iem","severity":"low","severityValue":25,"timestamp":1779059700000,"latitude":40.55,"longitude":-97.56},{"id":"iem_G_41.400_-97.600_1779059640000","source":"iem","severity":"low","severityValue":25,"timestamp":1779059640000,"latitude":41.4,"longitude":-97.6},{"id":"iem_D_41.450_-97.730_1779059520000","source":"iem","severity":"low","severityValue":25,"timestamp":1779059520000,"latitude":41.45,"longitude":-97.73},{"id":"iem_H_40.750_-97.850_1779059160000","source":"iem","severity":"low","severityValue":25,"timestamp":1779059160000,"latitude":40.75,"longitude":-97.85},{"id":"iem_G_41.290_-97.740_1779059700000","source":"iem","severity":"low","severityValue":25,"timestamp":1779059700000,"latitude":41.29,"longitude":-97.74},{"id":"gnews_weather_494179_134","source":"google_news","severity":"medium","severityValue":40,"timestamp":1779044640000,"latitude":40.8,"longitude":-96.67},{"id":"gnews_weather_494179_147","source":"google_news","severity":"medium","severityValue":40,"timestamp":1779045572000,"latitude":40.8,"longitude":-96.67},{"id":"gnews_weather_494180_164","source":"google_news","severity":"medium","severityValue":40,"timestamp":1779050700000,"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.
Review the area, threshold and delivery channel in your account.
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