Right now
The most recent data we hold from NOAA arrived 9 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 20 July 2026 at 23:00 UTC. It is kept here as a record.
No stronger detection stands among the 31 recorded within 20 km of this point since 15 March 2026 — 3 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 July 20 at 6:41PM EDT until July 20 at 7:00PM EDT by NWS Marquette MI
An estimated 21,297 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 30, 2026 · score 58 · 8.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 58 out of 100, at 80 % 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) | 58 / 100 |
| Our confidence | 80% |
| Coordinates | 46.2062, -87.1418 |
| Nearest City | Marquette (42 km) |
| Population Exposed | 21.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-20T22:41:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.40885d50fdec83a7e65430792471c26b |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Alger, MI; Marquette, MI; Delta, MI; Marquette, MI; Menominee, MI |
| Headline | Tornado Warning issued July 20 at 6:41PM EDT until July 20 at 7:00PM EDT by NWS Marquette MI |
| Expires | 2026-07-20T19:00:00-04:00 |
| SenderName | NWS Marquette MI |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.40885d50fdec83a7e65430792471c26b793aff01.001.1","noaa_urn:oid:2.49.0.1.840.0.ad75481ab72990ed3e7b719e85109618176a1b39.001.1"] |
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.
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