Right now
The most recent data we hold from NOAA arrived 40 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 16 March 2026 at 15:30 UTC. It is kept here as a record.
It is the 96th 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. 41 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Heavy Freezing Spray Warning issued March 16 at 3:27AM EDT until March 17 at 12:00PM EDT by NWS Grand Rapids MI
Nearby, since 10 March 2026
- September 3, 2026 · score 28 · 0.0 km
- August 9, 2026 · score 22 · 0.0 km
- August 8, 2026 · score 22 · 0.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 16 out of 100, at 57 % 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) | 16 / 100 |
| Our confidence | 57% |
| Coordinates | 44.3000, -85.6000 |
| Nearest City | Traverse City (51 km) |
| Impact Tier | minor |
| Timestamp | 2026-03-16T18:00:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Heavy Freezing Spray Warning_noaa_urn:oid:2.49.0.1.840.0.a4278cf38a69ad83b701252211b518a0 |
Score Breakdown
Technical Details
| Event | Heavy Freezing Spray Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Grand Haven to Whitehall MI; Whitehall to Pentwater MI; Pentwater to Manistee MI; St Joseph to South Haven MI; South Haven to Holland MI; Holland to Grand Haven MI; Lake Michigan from Seul Choix Point to Rock Island Passage 5NM offshore to Mid Lake; Lake Michigan South of a line from Seul Choix Point to the Mackinac Bridge and North of a line from Charlevoix MI to South Fox Island 5NM offshore; Lake Michigan from Charlevoix to Point Betsie MI 5NM Offshore to mid lake; Lake Michigan from Point Betsie to Manistee MI 5NM offshore to Mid Lake; Lake Michigan from Rock Island Passage to Sturgeon Bay WI 5NM offshore to mid lake; Lake Michigan from Sturgeon Bay to Two Rivers WI 5NM offshore to Mid Lake; Lake Michigan from Two Rivers to Sheboygan WI 5NM offshore to Mid Lake; Lake Michigan from Sheboygan to Port Washington WI 5NM offshore to Mid Lake; Lake Michigan from Port Washington to North Point Light WI 5NM offshore to Mid Lake; Lake Michigan from Pentwater to Manistee MI 5NM offshore to Mid Lake; Lake Michigan from Whitehall to Pentwater MI 5NM offshore to Mid Lake; Lake Michigan from Grand Haven to Whitehall MI 5NM offshore to Mid Lake and 8 more areas |
| Headline | Heavy Freezing Spray Warning issued March 16 at 3:27AM EDT until March 17 at 12:00PM EDT by NWS Grand Rapids MI |
| Expires | 2026-03-16T11:30:00-04:00 |
| SenderName | NWS Grand Rapids MI |
| HasExactCoords | false |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.a4278cf38a69ad83b701252211b518a062dd8160.001.3","noaa_urn:oid:2.49.0.1.840.0.a4278cf38a69ad83b701252211b518a062dd8160.002.2","noaa_urn:oid:2.49.0.1.840.0.bb92f9ee5c72e3e91fddb665fc18fedfba045e4e.001.2","noaa_urn:oid:2.49.0.1.840.0.2406246bbbc51b821af7406d9c6735e034356d4c.004.2","noaa_urn:oid:2.49.0.1.840.0.2406246bbbc51b821af7406d9c6735e034356d4c.005.2","noaa_urn:oid:2.49.0.1.840.0.2406246bbbc51b821af7406d9c6735e034356d4c.003.2","noaa_urn:oid:2.49.0.1.840.0.2406246bbbc51b821af7406d9c6735e034356d4c.002.2","noaa_urn:oid:2.49.0.1.840.0.72ca167e60a13d1adc66296ab0e3c1cf9103dfd4.002.3","noaa_urn:oid:2.49.0.1.840.0.72ca167e60a13d1adc66296ab0e3c1cf9103dfd4.001.3","noaa_urn:oid:2.49.0.1.840.0.72ca167e60a13d1adc66296ab0e3c1cf9103dfd4.005.2","noaa_urn:oid:2.49.0.1.840.0.72ca167e60a13d1adc66296ab0e3c1cf9103dfd4.006.2"] |
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 16/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.