Right now
The most recent data we hold from NOAA arrived 32 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
2 other detections within 20 km in the last 24 hours, the nearest 17 km from here.
This alert expired on 17 May 2026 at 03:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 47 detections recorded within 20 km of this point since 15 March 2026. 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: Severe Thunderstorm Warning issued May 16 at 9:28PM CDT until May 16 at 10:00PM CDT by NWS Omaha/Valley NE
Urban PEI: 24,924 within a heuristic 50 km radius; not unique people.
How we know
5 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 | 0.89/1 |
| Coordinates | 40.2739, -98.2124 |
| Nearest City | Hastings (38 km) |
| Urban exposure index (PEI) | 24.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-17T02:28:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.829ad50422e3d32eafcfd0982e14e527 |
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: 2026-05-17T02:28:00.000Z.
First archived: 2026-05-17T02:29:35.741Z. 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 | Saunders, NE; Hamilton, NE; Merrick, NE; Nance, NE; Polk, NE; York, NE; Saline, NE and 12 more areas |
| Headline | Severe Thunderstorm Warning issued May 16 at 9:28PM CDT until May 16 at 10:00PM CDT by NWS Omaha/Valley NE |
| Expires | 2026-05-16T22:00:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| MergedCount | 16 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.829ad50422e3d32eafcfd0982e14e52703d10258.001.1","noaa_urn:oid:2.49.0.1.840.0.449172fd381993ab93efaa8696e648da764281aa.001.1","noaa_urn:oid:2.49.0.1.840.0.4acc0ac69a9077621ce6364550d987c3bd614f19.002.1","noaa_urn:oid:2.49.0.1.840.0.e65862196e734b69344daf1a7ed734ad162982a3.001.1","noaa_urn:oid:2.49.0.1.840.0.4c44a2c35ff476804907ed04b7426f764ce87bf9.001.1","noaa_urn:oid:2.49.0.1.840.0.4cd4b03f96d9ad065408fcf959158b05b808aa8a.001.1","noaa_urn:oid:2.49.0.1.840.0.0367148de4ab8c15e1cb188cb13f058c14a67166.001.1","noaa_urn:oid:2.49.0.1.840.0.05ec5b85b01811d3b759bf6d16dcdc634cf0e4b7.001.1","noaa_urn:oid:2.49.0.1.840.0.1d64e352cfa6a8ce0c535d6a77615e2b6e0b95ec.001.1","noaa_urn:oid:2.49.0.1.840.0.5d8f879c682f1af06d04cd1d1e514c86660166ab.001.1","noaa_urn:oid:2.49.0.1.840.0.6089118bfeb1479edf49a2c39e13b6487908fbad.001.1","noaa_urn:oid:2.49.0.1.840.0.460bfa96ac5a85964d5165206bbc2824f5f69fad.001.1","noaa_urn:oid:2.49.0.1.840.0.7cecb56ce362e39b2d7479c40e3908c17564c396.001.1","noaa_urn:oid:2.49.0.1.840.0.3e7d282b9d9fc07ad6154fedbb8ed1707a8a0a0c.001.1","noaa_urn:oid:2.49.0.1.840.0.d95116ba02b3198c7885be4c3e9b4b70f1c90f61.001.1","noaa_urn:oid:2.49.0.1.840.0.8b0cf1aa761250a030337cf507036109a47071d0.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1.5 |
| Iem Unit | Inch |
| Iem City | 3 SSE Grand Island |
| Iem County | Hall |
| Iem State | NE |
| Iem Wfo | GID |
| Iem Remark | NWS Employee. |
| Google News RssFeed | weather |
| Google News SourceName | The New York Times |
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.
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