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 12 June 2026 at 06:00 UTC. It is kept here as a record.
No stronger detection stands among the 130 recorded within 20 km of this point since 10 March 2026 — 13 others scored the same. Another comparable one was recorded here earlier the same day. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Watch issued June 11 at 8:26PM EDT until June 12 at 2:00AM EDT by NWS Grand Rapids MI
Nearby, since 10 March 2026
- September 3, 2026 · score 28 · 0.0 km
- June 11, 2026 · score 16 · 0.0 km
- March 16, 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.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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 | Medium |
| Calamity Score (ours) | 34 / 100 |
| Legacy data-support index | 0.60/1 |
| Coordinates | 44.3000, -85.6000 |
| Nearest City | Traverse City (51 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-12T00:26:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Watch_noaa_urn:oid:2.49.0.1.840.0.232e5617a1791b0b61edd0250b4911dd |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-06-12T00:26:00.000Z.
First archived: 2026-06-12T02:02:27.725Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Tornado Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | St Joseph to South Haven MI; South Haven to Holland MI; Holland to Grand Haven MI; Grand Haven to Whitehall MI; Lake Michigan from Grand Haven to Whitehall MI 5NM offshore to Mid Lake; Lake Michigan from Holland to Grand Haven MI 5NM offshore to Mid Lake; Lake Michigan from South Haven to Holland MI 5NM offshore to Mid lake; Lake Michigan from St Joseph to South Haven MI 5NM offshore to Mid Lake; Allegan, MI; Barry, MI; Calhoun, MI; Clinton, MI; Eaton, MI; Gratiot, MI; Ingham, MI; Ionia, MI; Isabella, MI; Jackson, MI; Kalamazoo, MI; Kent, MI; Mecosta, MI; Montcalm, MI; Muskegon, MI; Newaygo, MI; Ottawa, MI; Van Buren, MI; Bay, MI; Genesee, MI; Livingston, MI; Midland, MI; Saginaw, MI; Shiawassee, MI |
| Headline | Tornado Watch issued June 11 at 8:26PM EDT until June 12 at 2:00AM EDT by NWS Grand Rapids MI |
| Expires | 2026-06-12T02:00:00-04:00 |
| SenderName | NWS Grand Rapids MI |
| HasExactCoords | false |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.232e5617a1791b0b61edd0250b4911dd6c19135a.002.1","noaa_urn:oid:2.49.0.1.840.0.232e5617a1791b0b61edd0250b4911dd6c19135a.001.1","noaa_urn:oid:2.49.0.1.840.0.1a70146fe51738369c66f505ee9750d0da4cf36a.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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