This alert expired on 3 July 2026 at 23:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 77 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 3 at 6:50PM EDT until July 3 at 7:00PM EDT by NWS Northern Indiana
An estimated 398,157 people live within 50 km of this point.
Nearby, since 16 March 2026
- July 28, 2026 · score 43 · 7.6 km
- September 4, 2026 · score 37 · 7.9 km
- September 3, 2026 · score 37 · 7.9 km
How we know
Confirmed by 7 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 88 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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 |
| Our confidence | 88% |
| Coordinates | 41.7107, -83.7660 |
| Nearest City | Sylvania (5 km) |
| Population Exposed | 398.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-03T22:50:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.7b5e82f409018164ccccd5f925602330 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Jay, IN; Adams, IN; Allen, IN; Blackford, IN; Huntington, IN; Wells, IN; Paulding, OH; Van Wert, OH; Erie, OH; Ottawa, OH; Sandusky, OH; Seneca, OH; Wood, OH and 5 more areas |
| Headline | Severe Thunderstorm Warning issued July 3 at 6:50PM EDT until July 3 at 7:00PM EDT by NWS Northern Indiana |
| Expires | 2026-07-03T19:00:00-04:00 |
| SenderName | NWS Northern Indiana |
| HasExactCoords | true |
| MergedCount | 8 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.7b5e82f409018164ccccd5f92560233064584163.001.1","noaa_urn:oid:2.49.0.1.840.0.77b624f9531f357ffe1b7e7c6b1004627837c84c.001.1","noaa_urn:oid:2.49.0.1.840.0.2d897939d3bd95e35fe4c2fa9f841d405c3dadd0.001.1","noaa_urn:oid:2.49.0.1.840.0.18d36485b3a70629bc67c1ac44e0f3ca5b7d7fa8.001.1","noaa_urn:oid:2.49.0.1.840.0.3ffb2f713985327cfac364fe3dfd8db404af5150.001.1","noaa_urn:oid:2.49.0.1.840.0.0fbc75e742388ca9bf341f64378400d83218eb22.001.1","noaa_urn:oid:2.49.0.1.840.0.f8dbdff3df6450fdc77dbe7109e62688aa435529.001.1","noaa_urn:oid:2.49.0.1.840.0.94c03b0a6df22330daac3d76bbfc016094ca25f1.002.1"] |
| Iem TypeSummary | D |
| Iem City | 1 N Dexter |
| Iem County | Washtenaw |
| Iem State | MI |
| Iem Wfo | DTX |
| Iem Remark | Report of multiple trees on roadway around Mast Rd and Joy Rd |
| MergedSources | [{"id":"iem_G_42.050_-84.510_1783113600000","source":"iem","severity":"low","severityValue":25,"timestamp":1783113600000,"latitude":42.05,"longitude":-84.51},{"id":"iem_D_42.060_-84.500_1783113600000","source":"iem","severity":"low","severityValue":25,"timestamp":1783113600000,"latitude":42.06,"longitude":-84.5},{"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_41.940_-83.430_1783115580000","source":"iem","severity":"low","severityValue":25,"timestamp":1783115580000,"latitude":41.94,"longitude":-83.43},{"id":"iem_D_42.320_-84.020_1783113960000","source":"iem","severity":"low","severityValue":25,"timestamp":1783113960000,"latitude":42.32,"longitude":-84.02},{"id":"iem_D_42.340_-83.880_1783114680000","source":"iem","severity":"low","severityValue":25,"timestamp":1783114680000,"latitude":42.34,"longitude":-83.88}] |
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.
Want to know when something happens near Sylvania?
Calamity.live data shows a weather event with CalamityScore 43/100, near Sylvania (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.