Right now
The most recent data we hold from NOAA arrived 3 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.
No stronger detection stands among the 41 recorded within 20 km of this point since 15 March 2026 — 5 others scored the same. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued May 17 at 7:44PM CDT until May 17 at 8:00PM CDT by NWS Wichita KS
Nearby, since 15 March 2026
- July 4, 2026 · score 22 · 5.8 km
- July 30, 2026 · score 22 · 19.8 km
How we know
11 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 | 39.5793, -97.5992 |
| Nearest City | Salina (82 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-05-18T00:44:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.f97f8feb762f87aefec8c074aa0fafee |
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: 2026-05-18T00:44:00.000Z.
First archived: 2026-05-18T00:47:30.646Z. 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 | Lincoln, KS; Gage, NE; Lancaster, NE; Saline, NE; Ottawa, KS |
| Headline | Tornado Warning issued May 17 at 7:44PM CDT until May 17 at 8:00PM CDT by NWS Wichita KS |
| Expires | 2026-05-17T20:00:00-05:00 |
| SenderName | NWS Wichita KS |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f97f8feb762f87aefec8c074aa0fafeed3f80af2.001.1","noaa_urn:oid:2.49.0.1.840.0.9eb97a41f73ff1ba1fa821655263cc3f94c7da01.002.1","noaa_urn:oid:2.49.0.1.840.0.a82bd052ba97f218edbd05ce274bd725cab5a524.001.1"] |
| Iem TypeSummary | T |
| Iem City | 2 SSW Hebron |
| Iem County | Thayer |
| Iem State | NE |
| Iem Wfo | GID |
| Iem Remark | Family member of NWS employee. |
| MergedSources | [{"id":"iem_H_40.020_-98.120_1779057360000","source":"iem","severity":"low","severityValue":25,"timestamp":1779057360000,"latitude":40.02,"longitude":-98.12},{"id":"iem_H_40.040_-98.070_1779057600000","source":"iem","severity":"low","severityValue":25,"timestamp":1779057600000,"latitude":40.04,"longitude":-98.07},{"id":"iem_G_40.180_-97.780_1779060600000","source":"iem","severity":"low","severityValue":25,"timestamp":1779060600000,"latitude":40.18,"longitude":-97.78},{"id":"iem_H_39.470_-98.130_1779060900000","source":"iem","severity":"low","severityValue":25,"timestamp":1779060900000,"latitude":39.47,"longitude":-98.13},{"id":"iem_G_39.500_-98.310_1779058140000","source":"iem","severity":"low","severityValue":25,"timestamp":1779058140000,"latitude":39.5,"longitude":-98.31},{"id":"iem_H_40.010_-97.770_1779059400000","source":"iem","severity":"low","severityValue":25,"timestamp":1779059400000,"latitude":40.01,"longitude":-97.77},{"id":"iem_H_40.140_-97.730_1779060840000","source":"iem","severity":"low","severityValue":25,"timestamp":1779060840000,"latitude":40.14,"longitude":-97.73},{"id":"iem_H_40.240_-97.770_1779062520000","source":"iem","severity":"low","severityValue":25,"timestamp":1779062520000,"latitude":40.24,"longitude":-97.77},{"id":"iem_G_40.130_-97.800_1779059940000","source":"iem","severity":"low","severityValue":25,"timestamp":1779059940000,"latitude":40.13,"longitude":-97.8},{"id":"iem_T_40.140_-97.600_1779061380000","source":"iem","severity":"low","severityValue":25,"timestamp":1779061380000,"latitude":40.14,"longitude":-97.6}] |
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.
Review the area, threshold and delivery channel in your account.
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