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 23:00 UTC. It is kept here as a record.
No stronger detection stands among the 31 recorded within 20 km of this point since 16 March 2026 — 7 others scored the same. Another comparable one was recorded here earlier the same day. 17 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued May 18 at 5:33PM CDT until May 18 at 6:00PM CDT by NWS Omaha/Valley NE
Nearby, since 16 March 2026
- June 14, 2026 · score 16 · 7.2 km
How we know
13 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 46 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 | Critical |
| Calamity Score (ours) | 46 / 100 |
| Legacy data-support index | 0.69/1 |
| Coordinates | 40.1224, -95.8137 |
| Nearest City | Saint Joseph (91 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-05-18T22:33:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.a818d5479a36e764cb0ebc40ad736e07 |
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: 2026-05-18T22:33:00.000Z.
First archived: 2026-05-18T22:36:36.817Z. 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 | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Page, IA; Richardson, NE; Clay, KS; Geary, KS; Riley, KS and 4 more areas |
| Headline | Tornado Warning issued May 18 at 5:33PM CDT until May 18 at 6:00PM CDT by NWS Omaha/Valley NE |
| Expires | 2026-05-18T18:00:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a818d5479a36e764cb0ebc40ad736e07257145e6.001.1","noaa_urn:oid:2.49.0.1.840.0.cb48348260c9ab58919b2032174bf6dbdebf5fab.001.1","noaa_urn:oid:2.49.0.1.840.0.a6e68bc071bc299088ad8a9a69b921dd8b8018df.001.1","noaa_urn:oid:2.49.0.1.840.0.d05b944b1a3f897d1da525b8e579af5ddd031a3d.001.1","noaa_urn:oid:2.49.0.1.840.0.94d7100625c9fdf87726e8b8d70146b0e813fdc7.001.1","noaa_urn:oid:2.49.0.1.840.0.bfd01024d235ad42215cdcc350e033ecd92c2b84.001.1","noaa_urn:oid:2.49.0.1.840.0.32f2e4b4d7e96828a7f79c0dd6045fedace6b64f.001.1","noaa_urn:oid:2.49.0.1.840.0.acdd29d0347d09ec3d726fb135075a318369d6d4.001.1"] |
| Iem TypeSummary | T |
| Iem City | 4 SSW Barada |
| Iem County | Richardson |
| Iem State | NE |
| Iem Wfo | OAX |
| Iem Remark | Multi-vortex tornado reported north of Falls City. |
| MergedSources | [{"id":"iem_G_40.510_-95.490_1779141900000","source":"iem","severity":"low","severityValue":25,"timestamp":1779141900000,"latitude":40.51,"longitude":-95.49},{"id":"iem_H_40.660_-95.490_1779141840000","source":"iem","severity":"low","severityValue":25,"timestamp":1779141840000,"latitude":40.66,"longitude":-95.49},{"id":"iem_H_40.210_-96.350_1779138660000","source":"iem","severity":"low","severityValue":25,"timestamp":1779138660000,"latitude":40.21,"longitude":-96.35},{"id":"iem_H_40.000_-96.350_1779138900000","source":"iem","severity":"low","severityValue":25,"timestamp":1779138900000,"latitude":40,"longitude":-96.35},{"id":"iem_G_40.410_-95.860_1779140040000","source":"iem","severity":"low","severityValue":25,"timestamp":1779140040000,"latitude":40.41,"longitude":-95.86},{"id":"iem_G_40.350_-96.050_1779138720000","source":"iem","severity":"low","severityValue":25,"timestamp":1779138720000,"latitude":40.35,"longitude":-96.05},{"id":"iem_G_40.450_-95.700_1779140700000","source":"iem","severity":"low","severityValue":25,"timestamp":1779140700000,"latitude":40.45,"longitude":-95.7},{"id":"iem_T_40.050_-96.240_1779140700000","source":"iem","severity":"low","severityValue":25,"timestamp":1779140700000,"latitude":40.05,"longitude":-96.24},{"id":"iem_G_40.220_-96.350_1779137220000","source":"iem","severity":"low","severityValue":25,"timestamp":1779137220000,"latitude":40.22,"longitude":-96.35},{"id":"iem_T_40.070_-95.820_1779141600000","source":"iem","severity":"low","severityValue":25,"timestamp":1779141600000,"latitude":40.07,"longitude":-95.82},{"id":"iem_H_40.190_-96.010_1779142080000","source":"iem","severity":"low","severityValue":25,"timestamp":1779142080000,"latitude":40.19,"longitude":-96.01},{"id":"iem_T_40.170_-95.620_1779142500000","source":"iem","severity":"low","severityValue":25,"timestamp":1779142500000,"latitude":40.17,"longitude":-95.62}] |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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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