This alert expired on 16 March 2026 at 06:00 UTC. It is kept here as a record.
It is the 51st strongest of the 453 detections recorded within 20 km of this point since 10 March 2026. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued March 15 at 6:42PM EDT until March 16 at 2:00AM EDT by NWS Northern Indiana
An estimated 1,525,459 people live within 50 km of this point.
Nearby, since 10 March 2026
- August 13, 2026 · score 52 · 0.0 km
- August 12, 2026 · score 52 · 0.0 km
- August 11, 2026 · score 52 · 0.0 km
How we know
Confirmed by 14 independent sources, including NOAA.
Our own score for this event is 52 out of 100, at 89 % 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) | 52 / 100 |
| Our confidence | 89% |
| Coordinates | 39.8000, -86.1000 |
| Nearest City | Indianapolis (6 km) |
| Population Exposed | 1.5M within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-03-15T22:42:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.3696353ce091605de7d65115af354aca |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Adams, IN; Allen, IN; Blackford, IN; Cass, IN; De Kalb, IN; Elkhart, IN; Fulton, IN; Grant, IN; Huntington, IN; Jay, IN; Kosciusko, IN; Lagrange, IN; La Porte, IN; Marshall, IN; Miami, IN; Noble, IN; Pulaski, IN; St. Joseph, IN; Starke, IN; Steuben, IN; Wabash, IN; Wells, IN; White, IN; Whitley, IN; Berrien, MI; Branch, MI; Cass, MI; Hillsdale, MI; St. Joseph, MI; Allen, OH; Defiance, OH; Fulton, OH; Henry, OH; Paulding, OH; Putnam, OH; Van Wert, OH; Williams, OH; New Buffalo MI to St Joseph MI; Michigan City IN to New Buffalo MI |
| Headline | Severe Thunderstorm Watch issued March 15 at 6:42PM EDT until March 16 at 2:00AM EDT by NWS Northern Indiana |
| Expires | 2026-03-16T02:00:00-04:00 |
| SenderName | NWS Northern Indiana |
| HasExactCoords | false |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.3696353ce091605de7d65115af354acaa001f995.001.1","noaa_urn:oid:2.49.0.1.840.0.3696353ce091605de7d65115af354acaa001f995.002.1"] |
| Iem TypeSummary | N |
| Iem Magnitude | 53 |
| Iem Unit | MPH |
| Iem City | 6 NNE Zionsville |
| Iem County | Boone |
| Iem State | IN |
| Iem Wfo | IND |
| Iem Remark | AWOS station KTYQ Indianapolis Exc. |
| MergedSources | [{"id":"iem_N_39.360_-85.910_1773600360000","source":"iem","severity":"low","severityValue":25,"timestamp":1773600360000,"latitude":39.36,"longitude":-85.91},{"id":"iem_O_40.090_-85.690_1773598200000","source":"iem","severity":"low","severityValue":25,"timestamp":1773598200000,"latitude":40.09,"longitude":-85.69},{"id":"iem_N_40.210_-85.480_1773597600000","source":"iem","severity":"low","severityValue":25,"timestamp":1773597600000,"latitude":40.21,"longitude":-85.48},{"id":"iem_N_39.720_-86.300_1773605040000","source":"iem","severity":"low","severityValue":25,"timestamp":1773605040000,"latitude":39.72,"longitude":-86.3},{"id":"iem_O_40.190_-85.400_1773596460000","source":"iem","severity":"low","severityValue":25,"timestamp":1773596460000,"latitude":40.19,"longitude":-85.4},{"id":"iem_O_39.200_-85.920_1773594720000","source":"iem","severity":"low","severityValue":25,"timestamp":1773594720000,"latitude":39.2,"longitude":-85.92},{"id":"iem_O_39.670_-85.700_1773604500000","source":"iem","severity":"low","severityValue":25,"timestamp":1773604500000,"latitude":39.67,"longitude":-85.7},{"id":"iem_O_39.640_-86.880_1773597600000","source":"iem","severity":"low","severityValue":25,"timestamp":1773597600000,"latitude":39.64,"longitude":-86.88},{"id":"iem_O_39.610_-85.450_1773595380000","source":"iem","severity":"low","severityValue":25,"timestamp":1773595380000,"latitude":39.61,"longitude":-85.45},{"id":"iem_N_39.980_-86.920_1773593700000","source":"iem","severity":"low","severityValue":25,"timestamp":1773593700000,"latitude":39.98,"longitude":-86.92},{"id":"iem_O_39.660_-85.650_1773599880000","source":"iem","severity":"low","severityValue":25,"timestamp":1773599880000,"latitude":39.66,"longitude":-85.65},{"id":"iem_N_40.270_-86.570_1773604500000","source":"iem","severity":"low","severityValue":25,"timestamp":1773604500000,"latitude":40.27,"longitude":-86.57},{"id":"iem_N_40.030_-86.250_1773594900000","source":"iem","severity":"low","severityValue":25,"timestamp":1773594900000,"latitude":40.03,"longitude":-86.25}] |
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 Indianapolis?
Calamity.live data shows a weather event with CalamityScore 52/100, near Indianapolis (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.