Right now
The most recent data we hold from NOAA arrived 2 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
One other detection within 20 km in the last 24 hours, 21 km from here.
This alert expired on 1 July 2026 at 19:15 UTC. It is kept here as a record.
No stronger detection stands among the 38 recorded within 20 km of this point since 16 March 2026 — 11 others scored the same. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued July 1 at 2:14PM EDT until July 1 at 3:15PM EDT by NWS Detroit/Pontiac MI
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 22 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) | 22 / 100 |
| Legacy data-support index | 0.69/1 |
| Coordinates | 44.5892, -83.4093 |
| Nearest City | Bay City (118 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-07-01T18:14:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.75b0b8008f1c575fa419c208411f340f |
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: 2026-07-01T18:14:00.000Z.
First archived: 2026-07-01T18:18:52.155Z. 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 | Special Marine Warning |
| Urgency | Immediate |
| Certainty | Likely |
| AreaDesc | Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw Bay; Inner Saginaw Bay SW of Point Au Gres to Bay Port MI; Presque Isle Light to Sturgeon Pt MI Including Thunder Bay National Marine Sanctuary; Sturgeon Pt to Alabaster MI; Lake Huron from Presque Isle Lt. to Sturgeon Point MI 5NM off shore to US/Canadian border; Lake Huron from Sturgeon Point to Alabaster MI 5NM off shore to US/Canadian border; 5NM East of Mackinac Bridge to Presque Isle Light MI including Bois Blanc Island; Presque Isle Light to Sturgeon Pt MI Including Thunder Bay National Marine Sanctuary; Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt to the US/Canadian border beyond 5 NM from shore; Lake Huron from Presque Isle Lt. to Sturgeon Point MI 5NM off shore to US/Canadian border |
| Headline | Special Marine Warning issued July 1 at 2:14PM EDT until July 1 at 3:15PM EDT by NWS Detroit/Pontiac MI |
| Expires | 2026-07-01T15:15:00-04:00 |
| SenderName | NWS Detroit/Pontiac MI |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.75b0b8008f1c575fa419c208411f340fdc9f68f2.001.1","noaa_urn:oid:2.49.0.1.840.0.f33105ab2f595972f597f5176356f4b3454f5804.001.1","noaa_urn:oid:2.49.0.1.840.0.b508fd53c1adb66292db88c6b376d28b7687b660.001.1"] |
| Iem TypeSummary | D |
| Iem City | 2 ENE South Branch |
| Iem County | Iosco |
| Iem State | MI |
| Iem Wfo | APX |
| Iem Remark | Power lines down. |
| MergedSources | [{"id":"iem_D_44.800_-83.590_1782925620000","source":"iem","severity":"low","severityValue":25,"timestamp":1782925620000,"latitude":44.8,"longitude":-83.59},{"id":"iem_D_44.480_-83.850_1782926100000","source":"iem","severity":"low","severityValue":25,"timestamp":1782926100000,"latitude":44.48,"longitude":-83.85}] |
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 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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