This alert expired on 19 May 2026 at 20:00 UTC. It is kept here as a record.
No stronger detection stands among the 64 recorded within 20 km of this point since 13 March 2026 — 33 others scored the same. Another comparable one was recorded here earlier the same day. 19 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 19 at 3:09PM EDT until May 19 at 4:00PM EDT by NWS Detroit/Pontiac MI
An estimated 3,224,505 people live within 50 km of this point.
Nearby, since 13 March 2026
- June 11, 2026 · score 46 · 4.9 km
- March 13, 2026 · score 52 · 8.4 km
- May 19, 2026 · score 52 · 9.0 km
How we know
Confirmed by 4 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 | 42.6029, -83.3252 |
| Nearest City | Pontiac (5 km) |
| Population Exposed | 3.2M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T19:09:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.cdc67c292997c6a8617a01df40190576 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Macomb, MI; Livingston, MI; Oakland, MI |
| Headline | Severe Thunderstorm Warning issued May 19 at 3:09PM EDT until May 19 at 4:00PM EDT by NWS Detroit/Pontiac MI |
| Expires | 2026-05-19T16:00:00-04:00 |
| SenderName | NWS Detroit/Pontiac MI |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.cdc67c292997c6a8617a01df401905768614a2ea.001.1","noaa_urn:oid:2.49.0.1.840.0.735a40abc15ae714cd4fbf5343ed3886a5a113c1.002.1","noaa_urn:oid:2.49.0.1.840.0.f8c830591c1a83b5fcbdf299a1bd62b2edee486e.001.1"] |
| Iem TypeSummary | D |
| Iem City | 2 N New Hudson |
| Iem County | Oakland |
| Iem State | MI |
| Iem Wfo | DTX |
| Iem Remark | Observed downed tree and large tree limbs. |
| MergedSources | [{"id":"iem_D_42.530_-83.630_1779215520000","source":"iem","severity":"low","severityValue":25,"timestamp":1779215520000,"latitude":42.53,"longitude":-83.63},{"id":"iem_G_42.680_-83.190_1779216900000","source":"iem","severity":"low","severityValue":25,"timestamp":1779216900000,"latitude":42.68,"longitude":-83.19},{"id":"iem_D_42.540_-83.620_1779215580000","source":"iem","severity":"low","severityValue":25,"timestamp":1779215580000,"latitude":42.54,"longitude":-83.62}] |
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 Pontiac (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.