This alert expired on 15 March 2026 at 14:15 UTC. It is kept here as a record.
It is the 35th strongest of the 170 detections recorded within 20 km of this point since 15 March 2026. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Heavy Freezing Spray Warning issued March 14 at 10:09PM EDT until March 17 at 2:00AM EDT by NWS Marquette MI
An estimated 16,788 people live within 50 km of this point.
Nearby, since 15 March 2026
- August 9, 2026 · score 34 · 0.0 km
- August 4, 2026 · score 34 · 0.0 km
- August 3, 2026 · score 34 · 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, at 78 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 34 / 100 |
| Our confidence | 78% |
| Coordinates | 46.0000, -94.3000 |
| Nearest City | Sartell (43 km) |
| Population Exposed | 16.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-15T12:00:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Heavy-Freezing-Spray-Warning_noaa_urn-oid-2_49_0_1_840_0_234968bf93600a1ba038e1ccc223f270 |
Score Breakdown
Technical Details
| Event | Heavy Freezing Spray Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Lake Superior west of a line from Saxon Harbor WI to Grand Portage MN beyond 5NM; Taconite Harbor to Silver Bay Harbor MN; Sand Island to Bayfield WI; Oak Point to Saxon Harbor WI; Outer Apostle Islands Beyond 5 NM from Mainland; Silver Bay Harbor to Two Harbors MN; Two Harbors to Duluth MN; Duluth MN to Port Wing WI; Port Wing to Sand Island WI and 2 more areas |
| Headline | Heavy Freezing Spray Warning issued March 14 at 10:09PM EDT until March 17 at 2:00AM EDT by NWS Marquette MI |
| Expires | 2026-03-15T10:15:00-04:00 |
| SenderName | NWS Marquette MI |
| HasExactCoords | false |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.234968bf93600a1ba038e1ccc223f270724a224b.001.1","noaa_urn:oid:2.49.0.1.840.0.c70e6de8926a8305687b38a125648257153d76ca.003.2","noaa_urn:oid:2.49.0.1.840.0.c70e6de8926a8305687b38a125648257153d76ca.004.2","noaa_urn:oid:2.49.0.1.840.0.c70e6de8926a8305687b38a125648257153d76ca.001.2","noaa_urn:oid:2.49.0.1.840.0.c70e6de8926a8305687b38a125648257153d76ca.002.2"] |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.