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 17 March 2026 at 14:15 UTC. It is kept here as a record.
It is the 16th strongest of the 130 detections recorded within 20 km of this point since 10 March 2026. Another comparable one was recorded here earlier the same day. 49 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Heavy Freezing Spray Warning issued March 16 at 10:06PM EDT until March 17 at 2:00PM EDT by NWS Marquette MI
Nearby, since 10 March 2026
- June 11, 2026 · score 16 · 0.0 km
- March 16, 2026 · score 22 · 0.0 km
- March 11, 2026 · score 16 · 0.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 58 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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 |
| Our confidence | 58% |
| Coordinates | 44.3000, -85.6000 |
| Nearest City | Traverse City (51 km) |
| Impact Tier | minor |
| Timestamp | 2026-03-17T02:06:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Heavy Freezing Spray Warning_noaa_urn:oid:2.49.0.1.840.0.532bb1ff5d7c42138afa09ddef8d03ce |
Score Breakdown
Technical Details
| Event | Heavy Freezing Spray Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Lake Superior from Upper Entrance to Portage Canal to Manitou Island MI 5NM off shore to the US/Canadian Border; Lake Superior West of Line from Manitou Island to Marquette MI Beyond 5NM from shore; Saxon Harbor WI to Black River MI; Black River To Ontonagon MI; Ontonagon to Upper Entrance of Portage Canal MI; Lake Superior from Saxon Harbor WI to Upper Entrance to Portage Canal MI 5NM off shore to the US/Canadian border including Isle Royale National Park and 12 more areas |
| Headline | Heavy Freezing Spray Warning issued March 16 at 10:06PM EDT until March 17 at 2:00PM EDT by NWS Marquette MI |
| Expires | 2026-03-17T10:15:00-04:00 |
| SenderName | NWS Marquette MI |
| HasExactCoords | false |
| MergedCount | 15 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.532bb1ff5d7c42138afa09ddef8d03cee39327b5.005.2","noaa_urn:oid:2.49.0.1.840.0.532bb1ff5d7c42138afa09ddef8d03cee39327b5.007.2","noaa_urn:oid:2.49.0.1.840.0.532bb1ff5d7c42138afa09ddef8d03cee39327b5.009.2","noaa_urn:oid:2.49.0.1.840.0.532bb1ff5d7c42138afa09ddef8d03cee39327b5.001.2","noaa_urn:oid:2.49.0.1.840.0.532bb1ff5d7c42138afa09ddef8d03cee39327b5.004.2","noaa_urn:oid:2.49.0.1.840.0.532bb1ff5d7c42138afa09ddef8d03cee39327b5.006.2","noaa_urn:oid:2.49.0.1.840.0.532bb1ff5d7c42138afa09ddef8d03cee39327b5.003.2","noaa_urn:oid:2.49.0.1.840.0.532bb1ff5d7c42138afa09ddef8d03cee39327b5.008.2","noaa_urn:oid:2.49.0.1.840.0.532bb1ff5d7c42138afa09ddef8d03cee39327b5.002.2","noaa_urn:oid:2.49.0.1.840.0.cd6aafb6b229706ce48bb571a48edc5221a6aa0b.002.2","noaa_urn:oid:2.49.0.1.840.0.19ca5e9756183c8f8b577e17c05e8a2d7aa85e56.003.2","noaa_urn:oid:2.49.0.1.840.0.19ca5e9756183c8f8b577e17c05e8a2d7aa85e56.001.2","noaa_urn:oid:2.49.0.1.840.0.19ca5e9756183c8f8b577e17c05e8a2d7aa85e56.002.2","noaa_urn:oid:2.49.0.1.840.0.61dc427cd79602800d46197415f3f55347061aa1.001.2","noaa_urn:oid:2.49.0.1.840.0.61dc427cd79602800d46197415f3f55347061aa1.002.2"] |
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 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.
Want to know when something happens in this area?
Calamity.live data shows a weather event with CalamityScore 22/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.