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 18 May 2026 at 01:32 UTC. It is kept here as a record.
No stronger detection stands among the 35 recorded within 20 km of this point since 16 March 2026 — 5 others scored the same. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued May 17 at 8:22PM CDT until May 17 at 8:30PM CDT by NWS Twin Cities/Chanhassen MN
An estimated 565,569 people live within 50 km of this point.
Nearby, since 16 March 2026
- May 22, 2026 · score 72 · 8.9 km
- May 18, 2026 · score 72 · 10.6 km
- September 3, 2026 · score 41 · 13.2 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 72 out of 100, at 90 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 72 / 100 |
| Our confidence | 90% |
| Coordinates | 41.6016, -95.8621 |
| Nearest City | Council Bluffs (38 km) |
| Population Exposed | 565.6K within 50 km |
| Impact Tier | catastrophic |
| Date | 2026-05-18 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.777d75d204dde467496bcf2d86d96246 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Blue Earth, MN; Cherokee, IA; Plymouth, IA; Woodbury, IA; Harrison, IA; Pottawattamie, IA; Washington, NE and 4 more areas |
| Headline | Tornado Warning issued May 17 at 8:22PM CDT until May 17 at 8:30PM CDT by NWS Twin Cities/Chanhassen MN |
| Expires | 2026-05-17T20:32:00-05:00 |
| SenderName | NWS Twin Cities/Chanhassen MN |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.777d75d204dde467496bcf2d86d9624622c8f676.001.1","noaa_urn:oid:2.49.0.1.840.0.4a9b132f40488ddc150c79b19770fe1966d77974.001.1","noaa_urn:oid:2.49.0.1.840.0.4bf51aa878095e41acefdb9b29585e4eee8a77d9.001.1","noaa_urn:oid:2.49.0.1.840.0.6614bff84cd4e0f7021cd866acfd1b52cca28189.001.1","noaa_urn:oid:2.49.0.1.840.0.3c4097c19049c4a931ff98fa80ee6b25ec872229.001.1","noaa_urn:oid:2.49.0.1.840.0.56c9f8a1f5372bb92d6bdd02ce694d757f5b76d9.001.1","noaa_urn:oid:2.49.0.1.840.0.5d9dd682b6baf1279c65a33ef0e0b51e69780f93.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 58 |
| Iem Unit | MPH |
| Iem City | 3 WNW Macy |
| Iem County | Thurston |
| Iem State | NE |
| Iem Wfo | OAX |
| Iem Remark | Personal Weather Station. |
| Google News RssFeed | weather |
| Google News SourceName | Omaha World-Herald |
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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 72/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.