Right now
The most recent data we hold from NOAA arrived 3 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 30 June 2026 at 06:45 UTC. It is kept here as a record.
It is the 7th strongest of the 28 detections recorded within 20 km of this point since 3 April 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 30 at 1:28AM CDT until June 30 at 1:45AM CDT by NWS Duluth MN
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 16 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) | 16 / 100 |
| Legacy data-support index | 0.71/1 |
| Coordinates | 47.1822, -91.2637 |
| Nearest City | Duluth (78 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-30T06:28:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Special Marine Warning_noaa_urn:oid:2.49.0.1.840.0.f08a4bbda6767f20b1c09499e66278c7 |
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: 2026-06-30T06:28:00.000Z.
First archived: 2026-06-30T06:37:32.532Z. 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 | Taconite Harbor to Silver Bay Harbor MN; Silver Bay Harbor to Two Harbors MN; Two Harbors to Duluth MN; Duluth MN to Port Wing WI; Port Wing to Sand Island WI; Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM; Grand Marais to Taconite Harbor MN; Taconite Harbor to Silver Bay Harbor MN; Silver Bay Harbor to Two Harbors MN; Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM |
| Headline | Special Marine Warning issued June 30 at 1:28AM CDT until June 30 at 1:45AM CDT by NWS Duluth MN |
| Expires | 2026-06-30T01:45:00-05:00 |
| SenderName | NWS Duluth MN |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f08a4bbda6767f20b1c09499e66278c79061b4e3.001.1","noaa_urn:oid:2.49.0.1.840.0.5fd5ade1406713b6df81b00d098ab3d4b9bda8cf.001.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | Ashland |
| Spc County | Ashland |
| Spc State | WI |
| Spc Comments | Photos were received showing multiple trees down in Ashland following the storms. Time estimated by radar. (DLH) |
| MergedSources | [{"id":"spc_wind_46.78_-90.86_47","source":"spc","severity":"medium","severityValue":45,"timestamp":1782801169569,"latitude":46.78,"longitude":-90.86},{"id":"spc_wind_46.58_-90.87_68","source":"spc","severity":"medium","severityValue":45,"timestamp":1782801169569,"latitude":46.58,"longitude":-90.87}] |
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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