Right now
The most recent data we hold from NOAA arrived 4 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 12 June 2026 at 02:00 UTC. It is kept here as a record.
It is the 18th strongest of the 37 detections recorded within 20 km of this point since 26 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 June 11 at 9:47PM EDT until June 11 at 10:00PM EDT by NWS Grand Rapids MI
Urban PEI: 32,626 within a heuristic 50 km radius; not unique people.
Nearby, since 26 March 2026
- August 12, 2026 · score 39 · 13.3 km
- May 18, 2026 · score 43 · 15.2 km
- August 10, 2026 · score 39 · 18.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 28 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) | 28 / 100 |
| Legacy data-support index | 0.79/1 |
| Coordinates | 41.0779, -86.8838 |
| Nearest City | Valparaiso (46 km) |
| Urban exposure index (PEI) | 32.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-12T01:47:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.d95fac8c00b9190be6049ff160f1fd3c |
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: 2026-06-12T01:47:00.000Z.
First archived: 2026-06-12T01:52:02.581Z. 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 | Barry, MI; Calhoun, MI; Cass, IN; Fulton, IN; Marshall, IN; Miami, IN; Pulaski, IN; Starke, IN; White, IN and 10 more areas |
| Headline | Severe Thunderstorm Warning issued June 11 at 9:47PM EDT until June 11 at 10:00PM EDT by NWS Grand Rapids MI |
| Expires | 2026-06-11T22:00:00-04:00 |
| SenderName | NWS Grand Rapids MI |
| HasExactCoords | true |
| MergedCount | 13 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d95fac8c00b9190be6049ff160f1fd3c17a46e22.002.1","noaa_urn:oid:2.49.0.1.840.0.cb8bf7de75db5f40b9e74c33f5d2c8380aa277e1.001.1","noaa_urn:oid:2.49.0.1.840.0.e5d79695419d3f0374182c19432324d01f5f840b.001.1","noaa_urn:oid:2.49.0.1.840.0.f3d34f8dfcdcf9218cfabfa9ba803328d858595d.001.1","noaa_urn:oid:2.49.0.1.840.0.8c3223acb1ffedb70f78af22033873a4cef855ca.001.1","noaa_urn:oid:2.49.0.1.840.0.18d34e1a14edc3771716a5219cfe65ab057ef4bd.001.1","noaa_urn:oid:2.49.0.1.840.0.c0f87f3ac63a16885c7fbd7f9c3f93c7da5dd9fc.001.1","noaa_urn:oid:2.49.0.1.840.0.687b7f17c6fbe553e4a61081aeffdc9ab9200c7a.001.1","noaa_urn:oid:2.49.0.1.840.0.5c643cbb7a3aed25c00c7106d18dbd62c6a0d886.001.1","noaa_urn:oid:2.49.0.1.840.0.11ec081c9415513a2c812421cfed94abe3ff5ffe.001.1","noaa_urn:oid:2.49.0.1.840.0.abb08e29d5dfcb03ed7f111ef345d8546e0f213b.001.1","noaa_urn:oid:2.49.0.1.840.0.be8991b8213dda3550cb4d56b08ccd492d8cca16.001.1","noaa_urn:oid:2.49.0.1.840.0.71945af63235fff966226797915735f185a0f4e8.002.1"] |
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.
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