This alert expired on 19 May 2026 at 21:00 UTC. It is kept here as a record.
No stronger detection stands among the 54 recorded within 20 km of this point since 14 April 2026 — 26 others scored the same. 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: Severe Thunderstorm Warning issued May 19 at 4:42PM EDT until May 19 at 5:00PM EDT by NWS Detroit/Pontiac MI
An estimated 3,082,453 people live within 50 km of this point.
Nearby, since 14 April 2026
- May 19, 2026 · score 52 · 3.6 km
- May 19, 2026 · score 52 · 5.3 km
- May 19, 2026 · score 52 · 11.5 km
How we know
Confirmed by 12 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 89 % 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) | 52 / 100 |
| Our confidence | 89% |
| Coordinates | 42.5238, -82.9483 |
| Nearest City | Roseville (3 km) |
| Population Exposed | 3.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T20:42:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.8d964571c7e77239ffbff282a953aeb3 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Wayne, MI; Macomb, MI; Oakland, MI and 1 more areas |
| Headline | Severe Thunderstorm Warning issued May 19 at 4:42PM EDT until May 19 at 5:00PM EDT by NWS Detroit/Pontiac MI |
| Expires | 2026-05-19T17:00:00-04:00 |
| SenderName | NWS Detroit/Pontiac MI |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.8d964571c7e77239ffbff282a953aeb310a982a1.001.1","noaa_urn:oid:2.49.0.1.840.0.00619203865742c416bec35aa98daacf694c811f.001.1","noaa_urn:oid:2.49.0.1.840.0.9e3ded9640f80769aea8b447a26d619e44ea618d.001.1","noaa_urn:oid:2.49.0.1.840.0.db4cba028330897ca73ddeec578ed9db69a0204c.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 49 |
| Iem Unit | mph |
| Iem City | Oakland County Intl Air |
| Iem County | Oakland |
| Iem State | MI |
| Iem Wfo | DTX |
| Iem Remark | Measured at KPTK Pontiac Airport |
| Google News RssFeed | weather |
| Google News SourceName | The Detroit News |
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 52/100, near Roseville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.