This alert expired on 21 July 2026 at 04:00 UTC. It is kept here as a record.
No stronger detection stands among the 126 recorded within 20 km of this point since 10 March 2026 — 13 others scored the same. The last comparable one was on 18 July 2026. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Watch issued July 20 at 4:49PM EDT until July 21 at 12:00AM EDT by NWS Marquette MI
Nearby, since 10 March 2026
- August 9, 2026 · score 22 · 0.0 km
- August 8, 2026 · score 22 · 0.0 km
- August 7, 2026 · score 22 · 0.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 34 out of 100, at 60 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 34 / 100 |
| Our confidence | 60% |
| Coordinates | 44.3000, -85.6000 |
| Nearest City | Traverse City (51 km) |
| Impact Tier | minor |
| Timestamp | 2026-07-20T20:49:00.000Z |
Score Breakdown
Technical Details
| Event | Tornado Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Alger, MI; Baraga, MI; Delta, MI; Dickinson, MI; Gogebic, MI; Houghton, MI; Iron, MI; Marquette, MI; Menominee, MI; Ontonagon, MI; Schoolcraft, MI; Green Bay North of line from Cedar River MI to Rock Island Passage; Seul Choix Point to Point Detour MI; 5NM East of a line from Fairport MI to Rock Island Passage; Point Isabelle to Lower Entrance of Portage Canal MI; Portage Lake to Huron Island MI to Lower Entrance of Portage Canal To Huron Islands MI Including Keweenaw and Huron Bays; Huron Islands to Marquette MI; Marquette to Munising MI; Munising to Grand Marais MI |
| Headline | Tornado Watch issued July 20 at 4:49PM EDT until July 21 at 12:00AM EDT by NWS Marquette MI |
| Expires | 2026-07-21T00:00:00-04:00 |
| SenderName | NWS Marquette MI |
| HasExactCoords | false |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.28434281217d015f70ea18670c59f40abf67c66d.001.1","noaa_urn:oid:2.49.0.1.840.0.28434281217d015f70ea18670c59f40abf67c66d.002.1"] |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 34/100, near Traverse City (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.