Right now
The most recent data we hold from NOAA arrived 34 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 19 May 2026 at 00:00 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. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued May 18 at 3:28PM EDT until May 18 at 8:00PM EDT by NWS Gaylord 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 3 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 69 % 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 | 69% |
| Coordinates | 44.3000, -85.6000 |
| Nearest City | Traverse City (51 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-18T19:28:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.f519435d0083c50cf0643d35321f38ba |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | 5NM East of Mackinac Bridge to Presque Isle Light MI including Bois Blanc Island; Presque Isle Light to Sturgeon Pt MI Including Thunder Bay National Marine Sanctuary; Sturgeon Pt to Alabaster MI; 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; Alcona, MI; Alpena, MI; Arenac, MI; Crawford, MI; Gladwin, MI; Iosco, MI; Montmorency, MI; Ogemaw, MI; Oscoda, MI; Otsego, MI; Presque Isle, MI; Roscommon, MI; St. Clair River; Detroit River; Lake St. Clair Open Lake (U.S. Portion); Michigan Waters of Lake Erie from Detroit River to North Cape MI; Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw Bay; Inner Saginaw Bay SW of Point Au Gres to Bay Port MI; 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 1 more areas |
| Headline | Severe Thunderstorm Watch issued May 18 at 3:28PM EDT until May 18 at 8:00PM EDT by NWS Gaylord MI |
| Expires | 2026-05-18T20:00:00-04:00 |
| SenderName | NWS Gaylord MI |
| HasExactCoords | false |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.f519435d0083c50cf0643d35321f38badf2bf56c.004.1","noaa_urn:oid:2.49.0.1.840.0.f519435d0083c50cf0643d35321f38badf2bf56c.003.1","noaa_urn:oid:2.49.0.1.840.0.1668be346cf8107c8451a4cf00a36b591d6535ec.002.1","noaa_urn:oid:2.49.0.1.840.0.1668be346cf8107c8451a4cf00a36b591d6535ec.001.1"] |
| Iem TypeSummary | R |
| Iem Magnitude | 1.35 |
| Iem Unit | Inch |
| Iem City | 1 SSW Lake Ann |
| Iem County | Benzie |
| Iem State | MI |
| Iem Wfo | APX |
| Iem Remark | Mesonet station GW6471 Lake Ann. 6 hour total. |
| MergedSources | [{"id":"iem_R_44.740_-85.710_1779135000000","source":"iem","severity":"low","severityValue":25,"timestamp":1779135000000,"latitude":44.74,"longitude":-85.71},{"id":"iem_R_44.710_-85.850_1779132480000","source":"iem","severity":"low","severityValue":25,"timestamp":1779132480000,"latitude":44.71,"longitude":-85.85}] |
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.