This alert expired on 11 August 2026 at 17:00 UTC. It is kept here as a record.
It is the 4th strongest of the 68 detections recorded within 20 km of this point since 13 April 2026. Another comparable one was recorded here earlier the same day. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued August 11 at 11:14AM CDT until August 11 at 12:00PM CDT by NWS Northern Indiana
An estimated 571,235 people live within 50 km of this point.
Nearby, since 13 April 2026
- June 12, 2026 · score 72 · 2.4 km
- July 27, 2026 · score 72 · 7.7 km
- July 4, 2026 · score 43 · 9.8 km
How we know
Confirmed by 11 independent sources, including NOAA.
Our own score for this event is 72 out of 100, at 91 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | critical |
| Calamity Score (ours) | 72 / 100 |
| Our confidence | 91% |
| Coordinates | 41.4676, -87.0350 |
| Nearest City | Valparaiso (2 km) |
| Population Exposed | 571.2K within 50 km |
| Impact Tier | catastrophic |
| Timestamp | 2026-08-11T16:14:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.5b51f7ac7f568a1eb205d4bda2604362 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | La Porte, IN; Lake, IN; Porter, IN; Lake, IN |
| Headline | Tornado Warning issued August 11 at 11:14AM CDT until August 11 at 12:00PM CDT by NWS Northern Indiana |
| Expires | 2026-08-11T12:00:00-05:00 |
| SenderName | NWS Northern Indiana |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.5b51f7ac7f568a1eb205d4bda26043629ec5cd89.001.1","noaa_urn:oid:2.49.0.1.840.0.1f801f6bd4cc45b8b87ebd1852d4c7b5ce9a775a.001.1","noaa_urn:oid:2.49.0.1.840.0.68c413b154d5d4287772c35794747634d83a6000.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 0.75 |
| Iem Unit | Inch |
| Iem City | South Bend |
| Iem County | St. Joseph |
| Iem State | IN |
| Iem Wfo | IWX |
| MergedSources | [{"id":"iem_H_41.830_-86.370_1786445100000","source":"iem","severity":"low","severityValue":25,"timestamp":1786445100000,"latitude":41.83,"longitude":-86.37},{"id":"iem_H_41.260_-86.780_1786461000000","source":"iem","severity":"low","severityValue":25,"timestamp":1786461000000,"latitude":41.26,"longitude":-86.78},{"id":"iem_H_41.710_-86.340_1786446480000","source":"iem","severity":"low","severityValue":25,"timestamp":1786446480000,"latitude":41.71,"longitude":-86.34},{"id":"iem_H_41.260_-86.780_1786460700000","source":"iem","severity":"low","severityValue":25,"timestamp":1786460700000,"latitude":41.26,"longitude":-86.78},{"id":"iem_D_41.700_-86.300_1786445400000","source":"iem","severity":"low","severityValue":25,"timestamp":1786445400000,"latitude":41.7,"longitude":-86.3},{"id":"iem_H_41.700_-86.300_1786445700000","source":"iem","severity":"low","severityValue":25,"timestamp":1786445700000,"latitude":41.7,"longitude":-86.3},{"id":"iem_H_41.700_-86.300_1786445400000","source":"iem","severity":"low","severityValue":25,"timestamp":1786445400000,"latitude":41.7,"longitude":-86.3},{"id":"iem_H_41.370_-87.440_1786458720000","source":"iem","severity":"low","severityValue":25,"timestamp":1786458720000,"latitude":41.37,"longitude":-87.44},{"id":"iem_D_41.690_-86.300_1786445400000","source":"iem","severity":"low","severityValue":25,"timestamp":1786445400000,"latitude":41.69,"longitude":-86.3},{"id":"iem_H_41.680_-86.270_1786445700000","source":"iem","severity":"low","severityValue":25,"timestamp":1786445700000,"latitude":41.68,"longitude":-86.27}] |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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 72/100, near Valparaiso (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 188 scientific monitoring sources.