This alert expired on 19 May 2026 at 20:45 UTC. It is kept here as a record.
No stronger detection stands among the 38 recorded within 20 km of this point since 13 March 2026 — 21 others scored the same. Another comparable one was recorded here earlier the same day. 18 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 19 at 4:16PM EDT until May 19 at 4:45PM EDT by NWS Detroit/Pontiac MI
An estimated 3,242,885 people live within 50 km of this point.
Nearby, since 13 March 2026
- May 19, 2026 · score 52 · 7.5 km
- March 13, 2026 · score 52 · 10.3 km
- May 19, 2026 · score 52 · 10.5 km
How we know
Confirmed by 8 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 90 % 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 | 90% |
| Coordinates | 42.4598, -83.2182 |
| Nearest City | Southfield (1 km) |
| Population Exposed | 3.2M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T20:16:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.4185e8ad974a4be6b54d4586981fcbfb |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Oakland, MI; Wayne, MI; St. Clair, MI and 1 more areas |
| Headline | Severe Thunderstorm Warning issued May 19 at 4:16PM EDT until May 19 at 4:45PM EDT by NWS Detroit/Pontiac MI |
| Expires | 2026-05-19T16:45:00-04:00 |
| SenderName | NWS Detroit/Pontiac MI |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4185e8ad974a4be6b54d4586981fcbfba263b192.001.1","noaa_urn:oid:2.49.0.1.840.0.713aed81976a8e26de06065eb87d5733676e1b68.001.1","noaa_urn:oid:2.49.0.1.840.0.e168c3661c124e32acd7dcc2dfa72d3669fc9334.001.1","noaa_urn:oid:2.49.0.1.840.0.c2038149d60d67b8f56b96639e6af8259efc25f9.001.1"] |
| 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 Southfield (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.