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 04:45 UTC. It is kept here as a record.
No stronger detection stands among the 22 recorded within 20 km of this point since 14 April 2026 — 5 others scored the same. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued May 17 at 11:19PM CDT until May 17 at 11:45PM CDT by NWS La Crosse WI
Nearby, since 14 April 2026
- July 2, 2026 · score 46 · 13.2 km
- July 2, 2026 · score 46 · 20.0 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 46 out of 100, at 70 % 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) | 46 / 100 |
| Our confidence | 70% |
| Coordinates | 43.3840, -92.2060 |
| Nearest City | Austin (69 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-18T04:19:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.5cb9ac0f0fd8947fb034fd749d8d905ab5e7e2be.002.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Howard, IA |
| Headline | Tornado Warning issued May 17 at 11:19PM CDT until May 17 at 11:45PM CDT by NWS La Crosse WI |
| Expires | 2026-05-17T23:45:00-05:00 |
| SenderName | NWS La Crosse WI |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 61 |
| Iem Unit | MPH |
| Iem City | Austin Airport |
| Iem County | Mower |
| Iem State | MN |
| Iem Wfo | ARX |
| MergedSources | [{"id":"iem_G_43.140_-93.010_1779075240000","source":"iem","severity":"low","severityValue":25,"timestamp":1779075240000,"latitude":43.14,"longitude":-93.01},{"id":"iem_G_43.660_-92.930_1779076620000","source":"iem","severity":"low","severityValue":25,"timestamp":1779076620000,"latitude":43.66,"longitude":-92.93}] |
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 46/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.