This alert expired on 19 May 2026 at 20:45 UTC. It is kept here as a record.
No stronger detection stands among the 52 recorded within 20 km of this point since 13 March 2026 — 26 others scored the same. Another comparable one was recorded here earlier the same day. 17 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 19 at 3:41PM EDT until May 19 at 4:45PM EDT by NWS Detroit/Pontiac MI
An estimated 3,105,870 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 · 8.1 km
- May 19, 2026 · score 52 · 8.5 km
How we know
Confirmed by 7 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 | 42.5571, -83.0813 |
| Nearest City | Sterling Heights (5 km) |
| Population Exposed | 3.1M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T19:41:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.16ea69212689f5ad188f74a3753311ef |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Washtenaw, MI; St. Clair, MI; Macomb, MI |
| Headline | Severe Thunderstorm Warning issued May 19 at 3:41PM 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 | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.16ea69212689f5ad188f74a3753311ef13b97d6c.001.1","noaa_urn:oid:2.49.0.1.840.0.e836e80e6cb8ac4f4ff317e6c9a071a34a0e778d.001.1","noaa_urn:oid:2.49.0.1.840.0.5951c43275d769ed4d0719102beabce6046ba57c.001.1"] |
| Iem TypeSummary | D |
| Iem City | 3 E White Lake |
| Iem County | Oakland |
| Iem State | MI |
| Iem Wfo | DTX |
| Iem Remark | Large tree fell across Elizabeth Lake Road just west of Williams Lake Road. |
| 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_42.500_-83.880_1779216900000","source":"iem","severity":"low","severityValue":25,"timestamp":1779216900000,"latitude":42.5,"longitude":-83.88},{"id":"iem_D_42.540_-83.620_1779215580000","source":"iem","severity":"low","severityValue":25,"timestamp":1779215580000,"latitude":42.54,"longitude":-83.62},{"id":"iem_G_42.660_-83.410_1779218940000","source":"iem","severity":"low","severityValue":25,"timestamp":1779218940000,"latitude":42.66,"longitude":-83.41},{"id":"iem_D_42.640_-83.460_1779215700000","source":"iem","severity":"low","severityValue":25,"timestamp":1779215700000,"latitude":42.64,"longitude":-83.46}] |
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 Sterling Heights (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.