Right now
The most recent data we hold from NOAA arrived 1 minute 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 15:00 UTC. It is kept here as a record.
It is the 17th 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. 45 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Heavy Freezing Spray Warning issued March 16 at 7:59PM EDT until March 17 at 5:00PM EDT by NWS Detroit/Pontiac MI
Nearby, since 10 March 2026
- September 3, 2026 · score 28 · 0.0 km
- June 11, 2026 · score 16 · 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.
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) | 22 / 100 |
| Legacy data-support index | 0.60/1 |
| Coordinates | 44.3000, -85.6000 |
| Nearest City | Traverse City (51 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-03-16T23:59:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Heavy Freezing Spray Warning_noaa_urn:oid:2.49.0.1.840.0.b80feefe58b9806569ee50bdd5dfe157 |
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: 2026-03-16T23:59:00.000Z.
First archived: 2026-03-17T00:03:43.440Z. 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 | Heavy Freezing Spray Warning |
| Urgency | Expected |
| Certainty | Likely |
| AreaDesc | Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw Bay; Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt to the US/Canadian border beyond 5 NM from shore; Lake Huron from Presque Isle Lt. to Sturgeon Point MI 5NM off shore to US/Canadian border; Lake Huron from Sturgeon Point to Alabaster MI 5NM off shore to US/Canadian border; Port Austin to Harbor Beach MI; Harbor Beach to Port Sanilac MI; Port Sanilac to Port Huron MI; Lake Huron from Port Austin to Harbor Beach 5NM Off Shore to the US/Canadian border; Lake Huron from Harbor Beach to Port Sanilac 5NM Off Shore to US/Canadian border; Lake Huron from Port Sanilac to Port Huron 5NM Off Shore to US/Canadian border and 12 more areas |
| Headline | Heavy Freezing Spray Warning issued March 16 at 7:59PM EDT until March 17 at 5:00PM EDT by NWS Detroit/Pontiac MI |
| Expires | 2026-03-17T11:00:00-04:00 |
| SenderName | NWS Detroit/Pontiac MI |
| HasExactCoords | false |
| MergedCount | 15 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b80feefe58b9806569ee50bdd5dfe157df3fff71.004.2","noaa_urn:oid:2.49.0.1.840.0.b80feefe58b9806569ee50bdd5dfe157df3fff71.002.2","noaa_urn:oid:2.49.0.1.840.0.b80feefe58b9806569ee50bdd5dfe157df3fff71.003.2","noaa_urn:oid:2.49.0.1.840.0.35947b12ca9ab7e7aae3483f6b997e4a591a920d.002.2","noaa_urn:oid:2.49.0.1.840.0.35947b12ca9ab7e7aae3483f6b997e4a591a920d.008.2","noaa_urn:oid:2.49.0.1.840.0.35947b12ca9ab7e7aae3483f6b997e4a591a920d.001.2","noaa_urn:oid:2.49.0.1.840.0.35947b12ca9ab7e7aae3483f6b997e4a591a920d.005.2","noaa_urn:oid:2.49.0.1.840.0.35947b12ca9ab7e7aae3483f6b997e4a591a920d.003.2","noaa_urn:oid:2.49.0.1.840.0.35947b12ca9ab7e7aae3483f6b997e4a591a920d.007.2","noaa_urn:oid:2.49.0.1.840.0.35947b12ca9ab7e7aae3483f6b997e4a591a920d.010.2","noaa_urn:oid:2.49.0.1.840.0.35947b12ca9ab7e7aae3483f6b997e4a591a920d.006.2","noaa_urn:oid:2.49.0.1.840.0.35947b12ca9ab7e7aae3483f6b997e4a591a920d.004.2","noaa_urn:oid:2.49.0.1.840.0.3d2539ea46b1205dac9667882c0106db1b25a945.001.2","noaa_urn:oid:2.49.0.1.840.0.bb2e4a4ea573a80c407336062673f73288c3ca4c.001.2","noaa_urn:oid:2.49.0.1.840.0.bb2e4a4ea573a80c407336062673f73288c3ca4c.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.
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