This alert expired on 11 June 2026 at 01:15 UTC. It is kept here as a record.
It is the 35th strongest of the 66 detections recorded within 20 km of this point since 13 March 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 10 at 8:54PM EDT until June 10 at 9:15PM EDT by NWS Detroit/Pontiac MI
An estimated 3,087,490 people live within 50 km of this point.
Nearby, since 13 March 2026
- May 19, 2026 · score 52 · 4.9 km
- May 19, 2026 · score 52 · 10.4 km
- March 13, 2026 · score 52 · 10.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 out of 100, at 79 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 46 / 100 |
| Our confidence | 79% |
| Coordinates | 42.6233, -83.2721 |
| Nearest City | Pontiac (2 km) |
| Population Exposed | 3.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-11T00:54:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.688b94338fd119f6978cc24836488a8f |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Bay, MI; Livingston, MI; Shiawassee, MI and 6 more areas |
| Headline | Severe Thunderstorm Warning issued June 10 at 8:54PM EDT until June 10 at 9:15PM EDT by NWS Detroit/Pontiac MI |
| Expires | 2026-06-10T21:15:00-04:00 |
| SenderName | NWS Detroit/Pontiac MI |
| HasExactCoords | true |
| MergedCount | 9 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.688b94338fd119f6978cc24836488a8f5e3c4c63.001.1","noaa_urn:oid:2.49.0.1.840.0.7a1fbe3fb920ff2a1210f0c276304c10b6063e13.001.1","noaa_urn:oid:2.49.0.1.840.0.34f92ee66389a670e2117d57dc32c79abe589a53.001.1","noaa_urn:oid:2.49.0.1.840.0.98a0a4bc3178eeae04d983938c7350129e5a37fd.001.1","noaa_urn:oid:2.49.0.1.840.0.7498befe5ef5e9d02f0154843846e11bef4e91b6.001.1","noaa_urn:oid:2.49.0.1.840.0.76a078adf285af1979507e09f646df8e1764ca51.001.1","noaa_urn:oid:2.49.0.1.840.0.9e9c273cf2ee9ad94c5a866cefd9e1761bc6b75b.002.1","noaa_urn:oid:2.49.0.1.840.0.412ed30988f5d5b46e59c23cd16de8b8193663f6.001.1","noaa_urn:oid:2.49.0.1.840.0.739087df78aa4d66702f9a9df99c26aba2cfb2b3.001.1"] |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 46/100, near Pontiac (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.