Right now
The most recent data we hold from NOAA arrived 6 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 1 June 2026 at 06:00 UTC. It is kept here as a record.
It is the 3rd 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. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 1 at 12:46AM CDT until June 1 at 1:00AM CDT by NWS Omaha/Valley NE
Nearby, since 16 March 2026
- June 1, 2026 · score 22 · 0.8 km
- June 1, 2026 · score 22 · 6.3 km
- May 16, 2026 · score 22 · 7.1 km
How we know
4 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 22 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) | 22 / 100 |
| Legacy data-support index | 0.70/1 |
| Coordinates | 41.8128, -95.9333 |
| Nearest City | Omaha (61 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Date | 2026-06-01 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.62594ca0f345ce7a90f959394cfa2fc0 |
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: 2026-06-01 — time not reported.
First archived: 2026-06-01T05:47:15.148Z. 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 | Monona, IA; Burt, NE; Harrison, IA; Harrison, IA; Burt, NE; Washington, NE and 2 more areas |
| Headline | Severe Thunderstorm Warning issued June 1 at 12:46AM CDT until June 1 at 1:00AM CDT by NWS Omaha/Valley NE |
| Expires | 2026-06-01T01:00:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.62594ca0f345ce7a90f959394cfa2fc039b93a93.002.1","noaa_urn:oid:2.49.0.1.840.0.fbb72c6aa4da793cce215e1f34fc7c0846ed65cd.001.1","noaa_urn:oid:2.49.0.1.840.0.212c4250a04b90b38dd2fd9d4b1f8414bc04053f.001.1","noaa_urn:oid:2.49.0.1.840.0.8c3181934b26aa0794d1abe28594bbdbbea0d55a.001.1","noaa_urn:oid:2.49.0.1.840.0.de426126d76489a9c2c960901a5abd4d4196ca30.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | Woodbine |
| Iem County | Harrison |
| Iem State | IA |
| Iem Wfo | OAX |
| MergedSources | [{"id":"iem_H_41.300_-96.250_1780281180000","source":"iem","severity":"low","severityValue":25,"timestamp":1780281180000,"latitude":41.3,"longitude":-96.25},{"id":"iem_H_41.300_-96.260_1780280340000","source":"iem","severity":"low","severityValue":25,"timestamp":1780280340000,"latitude":41.3,"longitude":-96.26},{"id":"iem_H_41.740_-95.710_1780289760000","source":"iem","severity":"low","severityValue":25,"timestamp":1780289760000,"latitude":41.74,"longitude":-95.71}] |
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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