Right now
The most recent data we hold from NOAA arrived 5 hours ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 4 July 2026 at 00:00 UTC. It is kept here as a record.
It is the 3rd strongest of the 172 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 3 at 7:22PM EDT until July 3 at 8:00PM EDT by NWS Detroit/Pontiac MI
Urban PEI: 398,157 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- September 4, 2026 · score 37 · 3.1 km
- September 3, 2026 · score 37 · 11.2 km
- May 19, 2026 · score 43 · 11.4 km
How we know
6 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 43 / 100 |
| Legacy data-support index | 0.88/1 |
| Coordinates | 41.6532, -83.5769 |
| Nearest City | Toledo (2 km) |
| Urban exposure index (PEI) | 398.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-03T23:22:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.8d279ed14fe2cfaa7185ceb5c74036a6 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-07-03T23:22:00.000Z.
First archived: 2026-07-03T23:23:48.285Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | St. Clair, MI; Macomb, MI; Lapeer, MI and 5 more areas |
| Headline | Severe Thunderstorm Warning issued July 3 at 7:22PM EDT until July 3 at 8:00PM EDT by NWS Detroit/Pontiac MI |
| Expires | 2026-07-03T20:00:00-04:00 |
| SenderName | NWS Detroit/Pontiac MI |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.8d279ed14fe2cfaa7185ceb5c74036a66e72ebc5.001.1","noaa_urn:oid:2.49.0.1.840.0.3e39412761ed8a6d77f04ef54854b94778f038b9.001.1","noaa_urn:oid:2.49.0.1.840.0.2bead63ee1bdc5414fe73d6b4a72f5ec16d7308b.001.1","noaa_urn:oid:2.49.0.1.840.0.df709ed042e480cba16596fb58e89fc35ba2d7ce.001.1","noaa_urn:oid:2.49.0.1.840.0.4106dee16c490e30fa44cf61d458cbf2e174f4a5.001.1","noaa_urn:oid:2.49.0.1.840.0.6ece50747571dbd8d6d15e1b442d27fda0c1a430.001.1","noaa_urn:oid:2.49.0.1.840.0.7a19fbb223546c45552f471aa63955f0f240bfe0.001.1","noaa_urn:oid:2.49.0.1.840.0.e04bbddaea83233220cbe48bb5b4b1a8781e76a5.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 48 |
| Iem Unit | mph |
| Iem City | Monroe Custer Airport |
| Iem County | Monroe |
| Iem State | MI |
| Iem Wfo | DTX |
| MergedSources | [{"id":"iem_G_42.230_-83.330_1783117560000","source":"iem","severity":"low","severityValue":25,"timestamp":1783117560000,"latitude":42.23,"longitude":-83.33},{"id":"iem_D_42.150_-84.020_1783115400000","source":"iem","severity":"low","severityValue":25,"timestamp":1783115400000,"latitude":42.15,"longitude":-84.02},{"id":"iem_G_42.240_-83.530_1783115940000","source":"iem","severity":"low","severityValue":25,"timestamp":1783115940000,"latitude":42.24,"longitude":-83.53},{"id":"iem_D_42.260_-83.580_1783115760000","source":"iem","severity":"low","severityValue":25,"timestamp":1783115760000,"latitude":42.26,"longitude":-83.58},{"id":"iem_G_41.940_-83.430_1783115580000","source":"iem","severity":"low","severityValue":25,"timestamp":1783115580000,"latitude":41.94,"longitude":-83.43}] |
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 8 March 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.
Review the area, threshold and delivery channel in your account.
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