This alert expired on 8 August 2026 at 03:00 UTC. It is kept here as a record.
It is the 15th strongest of the 126 detections recorded within 20 km of this point since 10 March 2026. The last comparable one was on 27 July 2026. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued August 7 at 4:52PM EDT until August 7 at 11:00PM 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
- July 20, 2026 · score 34 · 0.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 58 % 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) | 22 / 100 |
| Our confidence | 58% |
| Coordinates | 44.3000, -85.6000 |
| Nearest City | Traverse City (51 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-07T20:52:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Alger, MI; Baraga, MI; Delta, MI; Dickinson, MI; Gogebic, MI; Houghton, MI; Iron, MI; Keweenaw, MI; Marquette, MI; Menominee, MI; Ontonagon, MI; Schoolcraft, MI; Green Bay North of line from Cedar River MI to Rock Island Passage; Saxon Harbor WI to Black River MI; Black River To Ontonagon MI; Ontonagon to Upper Entrance of Portage Canal MI; Upper Entrance of Portage Canal to Eagle River MI; Eagle River to Manitou Island MI; Manitou Island to Point Isabelle MI; 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; Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park; Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border; Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore; Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore |
| Headline | Severe Thunderstorm Watch issued August 7 at 4:52PM EDT until August 7 at 11:00PM EDT by NWS Marquette MI |
| Expires | 2026-08-07T23:00:00-04:00 |
| SenderName | NWS Marquette MI |
| HasExactCoords | false |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c781b137829b35f9dc9ddb2a48df007d21af71b4.001.1","noaa_urn:oid:2.49.0.1.840.0.c781b137829b35f9dc9ddb2a48df007d21af71b4.002.1"] |
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 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 22/100, near Traverse City (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.