Calamity
CriticalSevere WeatherCalamity Score: 63

Severe Weather in United States

GraysonUnited StatesNOAA

This alert expired on 16 March 2026 at 04:00 UTC. It is kept here as a record.

No stronger detection stands among the 123 recorded within 20 km of this point since 16 March 2026 — 2 others scored the same. Another comparable one was recorded here earlier the same day. 32 more were recorded here in the fortnight before it.

What the source measured

NOAA reported: Tornado Warning issued March 15 at 11:22PM EDT until March 16 at 12:00AM EDT by NWS Louisville KY

An estimated 63,616 people live within 50 km of this point.

Nearby, since 16 March 2026

How we know

Confirmed by 2 independent sources, including NOAA.

Our own score for this event is 63 out of 100, at 82 % 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

TypeSevere Weather
SeverityCritical
Calamity Score (ours)63 / 100
Our confidence82%
Coordinates37.3532, -86.2855
Nearest CityBowling Green (43 km)
Population Exposed63.6K within 50 km
Impact Tiersevere
Timestamp2026-03-16T03:22:00.000Z
Sourcehttps://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.d28f75e7280f9965200bd71f2504eba7

Score Breakdown

95
intensity
55
population
0
cascading
80
historical

Technical Details

EventTornado Warning
UrgencyImmediate
CertaintyObserved
AreaDescBreckinridge, KY; Bullitt, KY; Grayson, KY; Hardin, KY; Meade, KY; Nelson, KY; Edmonson, KY; Grayson, KY; Hardin, KY; Hart, KY; Clark, IN; Washington, IN and 2 more areas
HeadlineTornado Warning issued March 15 at 11:22PM EDT until March 16 at 12:00AM EDT by NWS Louisville KY
Expires2026-03-16T00:00:00-04:00
SenderNameNWS Louisville KY
HasExactCoordstrue
MergedCount5
MergedIds["noaa_urn:oid:2.49.0.1.840.0.d28f75e7280f9965200bd71f2504eba72b352760.001.1","noaa_urn:oid:2.49.0.1.840.0.32b6e8ab8fa033788a4e0d3159040d133fdcd1a0.002.1","noaa_urn:oid:2.49.0.1.840.0.b16f0024650c2e97dea4c4a6fdffade62cd37706.002.1","noaa_urn:oid:2.49.0.1.840.0.85920f7878f38a51869d9e94d90b84857afd34e1.002.1","noaa_urn:oid:2.49.0.1.840.0.02f1b9d43d1d50eff921991c09d3811379668bc4.001.1"]
Spc ReportTypewind
Spc Speed68
Spc Location2 WSW Woodbury
Spc CountyButler
Spc StateKY
Spc Comments(LMK)
MergedSources[{"id":"spc_wind_37.16_-86.67_117","source":"spc","severity":"medium","severityValue":45,"timestamp":1773630300000,"latitude":37.16,"longitude":-86.67}]

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 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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Calamity.live data shows a weather event with CalamityScore 63/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.