Right now
The most recent data we hold from NOAA arrived 4 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 strongest of the 157 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 29 June 2026. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Special Marine Warning issued June 30 at 12:51AM CDT until June 30 at 1:45AM CDT by NWS Duluth MN
Urban PEI: 112,689 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- June 5, 2026 · score 43 · 2.9 km
- June 10, 2026 · score 43 · 11.0 km
- May 24, 2026 · score 43 · 18.7 km
How we know
7 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 49 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 | High |
| Calamity Score (ours) | 49 / 100 |
| Legacy data-support index | 0.91/1 |
| Coordinates | 46.8057, -91.8536 |
| Nearest City | Duluth (20 km) |
| Urban exposure index (PEI) | 112.7K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-06-30T05:51:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.8f5b28fd6aa156016da0d256306f3d3391c08ff8.001.1 |
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: 2026-06-30T05:51:00.000Z.
First archived: 2026-06-30T06:21:22.589Z. 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 |
| Headline | Special Marine Warning issued June 30 at 12:51AM 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 |
| Spc ReportType | hail |
| Spc Speed | 100 |
| Spc Location | Wrenshall |
| Spc County | Carlton |
| Spc State | MN |
| Spc Comments | Photo sent in via social media showing the largest hailstone next to a quarter. Also two other smaller hailstones in the picture. (DLH) |
| MergedSources | [{"id":"spc_wind_46.51_-91.73_51","source":"spc","severity":"medium","severityValue":45,"timestamp":1782800366243,"latitude":46.51,"longitude":-91.73},{"id":"spc_hail_46.50_-92.69_113","source":"spc","severity":"high","severityValue":65,"timestamp":1782800366243,"latitude":46.5,"longitude":-92.69},{"id":"spc_hail_46.50_-92.69_114","source":"spc","severity":"high","severityValue":65,"timestamp":1782800366243,"latitude":46.5,"longitude":-92.69},{"id":"spc_hail_46.50_-92.69_115","source":"spc","severity":"high","severityValue":65,"timestamp":1782800366243,"latitude":46.5,"longitude":-92.69},{"id":"spc_hail_46.57_-92.63_116","source":"spc","severity":"high","severityValue":65,"timestamp":1782800366243,"latitude":46.57,"longitude":-92.63},{"id":"spc_hail_46.62_-92.38_117","source":"spc","severity":"high","severityValue":65,"timestamp":1782800366243,"latitude":46.62,"longitude":-92.38}] |
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.
Review the area, threshold and delivery channel in your account.
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