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 17 March 2026 at 01:00 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. 29 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Storm Warning issued March 16 at 12:51PM EDT until March 16 at 8:00PM 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
Confirmed by 7 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 66 % 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 | 66% |
| Coordinates | 44.3000, -85.6000 |
| Nearest City | Traverse City (51 km) |
| Impact Tier | minor |
| Timestamp | 2026-03-16T16:51:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Storm Warning_noaa_urn:oid:2.49.0.1.840.0.bb2e4a4ea573a80c407336062673f732 |
Score Breakdown
Technical Details
| Event | Storm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Grand Haven to Whitehall MI; Whitehall to Pentwater MI; Pentwater to Manistee MI; 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; Marquette to Munising MI; Munising to Grand Marais MI; Grand Marais to Whitefish Point MI; Lake Superior East of a line from Manitou Island to Marquette MI and West of a line from Grand Marais MI to the US/Canadian Border Beyond 5NM from shore; Lake Superior from Grand Marais MI to Whitefish Point MI 5NM off shore to the US/Canadian border and 3 more areas |
| Headline | Storm Warning issued March 16 at 12:51PM EDT until March 16 at 8:00PM EDT by NWS Grand Rapids MI |
| Expires | 2026-03-16T21:00:00-04:00 |
| SenderName | NWS Grand Rapids MI |
| HasExactCoords | false |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.bb2e4a4ea573a80c407336062673f73288c3ca4c.002.1","noaa_urn:oid:2.49.0.1.840.0.f2263c956dc51e6632be12b6ba90db6da887d88d.001.1","noaa_urn:oid:2.49.0.1.840.0.f2263c956dc51e6632be12b6ba90db6da887d88d.005.1","noaa_urn:oid:2.49.0.1.840.0.f2263c956dc51e6632be12b6ba90db6da887d88d.002.1","noaa_urn:oid:2.49.0.1.840.0.f2263c956dc51e6632be12b6ba90db6da887d88d.004.1","noaa_urn:oid:2.49.0.1.840.0.bb92f9ee5c72e3e91fddb665fc18fedfba045e4e.001.1"] |
| Iem TypeSummary | S |
| Iem Magnitude | 7 |
| Iem Unit | Inch |
| Iem City | 1 NNE Grawn |
| Iem County | Grand Traverse |
| Iem State | MI |
| Iem Wfo | APX |
| Iem Remark | Cocorahs station MI-GT-30 Traverse City 6.1 SW. |
| MergedSources | [{"id":"iem_R_43.980_-86.420_1773658800000","source":"iem","severity":"low","severityValue":25,"timestamp":1773658800000,"latitude":43.98,"longitude":-86.42},{"id":"iem_R_43.700_-85.480_1773658800000","source":"iem","severity":"low","severityValue":25,"timestamp":1773658800000,"latitude":43.7,"longitude":-85.48},{"id":"iem_5_44.250_-85.390_1773658800000","source":"iem","severity":"low","severityValue":25,"timestamp":1773658800000,"latitude":44.25,"longitude":-85.39},{"id":"iem_N_44.630_-86.250_1773660360000","source":"iem","severity":"low","severityValue":25,"timestamp":1773660360000,"latitude":44.63,"longitude":-86.25},{"id":"iem_S_44.730_-85.510_1773658800000","source":"iem","severity":"low","severityValue":25,"timestamp":1773658800000,"latitude":44.73,"longitude":-85.51},{"id":"iem_S_44.680_-85.680_1773660600000","source":"iem","severity":"low","severityValue":25,"timestamp":1773660600000,"latitude":44.68,"longitude":-85.68}] |
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.