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 29 June 2026 at 20:30 UTC. It is kept here as a record.
No stronger detection stands among the 18 recorded within 20 km of this point since 26 May 2026 — 11 others scored the same. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 29 at 3:18PM CDT until June 29 at 3:30PM CDT by NWS Duluth MN
Nearby, since 26 May 2026
- May 26, 2026 · score 22 · 19.7 km
How we know
4 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 | 47.0922, -90.8416 |
| Nearest City | Duluth (102 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-29T20:18:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.20804af3d6e8274efdc45a7e15834fc8 |
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: 2026-06-29T20:18:00.000Z.
First archived: 2026-06-29T20:23:13.693Z. 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 | Chequamegon Bay-Bayfield to Oak Point WI; Silver Bay Harbor to Two Harbors MN; Two Harbors to Duluth MN; Duluth MN to Port Wing WI; Port Wing to Sand Island WI; Sand Island to Bayfield WI; Oak Point to Saxon Harbor WI; Outer Apostle Islands Beyond 5 NM from Mainland; Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM; Grand Portage to Grand Marais MN; Grand Marais to Taconite Harbor MN; Taconite Harbor to Silver Bay Harbor MN; Silver Bay Harbor to Two Harbors MN; Outer Apostle Islands Beyond 5 NM from Mainland; Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM |
| Headline | Special Marine Warning issued June 29 at 3:18PM CDT until June 29 at 3:30PM CDT by NWS Duluth MN |
| Expires | 2026-06-29T15:30:00-05:00 |
| SenderName | NWS Duluth MN |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.20804af3d6e8274efdc45a7e15834fc89065790c.001.1","noaa_urn:oid:2.49.0.1.840.0.7e6d82ae39b345317a89631a77ff095677fabbb0.002.1"] |
| Iem TypeSummary | R |
| Iem Magnitude | 6.5 |
| Iem Unit | Inch |
| Iem City | 12 NE Sand Bay |
| Iem County | Ashland |
| Iem State | WI |
| Iem Wfo | DLH |
| Iem Remark | Measured on Rocky Island. |
| MergedSources | [{"id":"iem_R_47.170_-91.420_1782762900000","source":"iem","severity":"low","severityValue":25,"timestamp":1782762900000,"latitude":47.17,"longitude":-91.42},{"id":"iem_R_47.270_-91.310_1782748800000","source":"iem","severity":"low","severityValue":25,"timestamp":1782748800000,"latitude":47.27,"longitude":-91.31},{"id":"iem_R_47.040_-90.680_1782756360000","source":"iem","severity":"low","severityValue":25,"timestamp":1782756360000,"latitude":47.04,"longitude":-90.68}] |
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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