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Easter 2020 tornado outbreak, Apr 12–13, 2020

1 of 2 · The storm's data
forty°seventy

Easter 2020 tornado outbreak, Apr 12–13, 2020

Easter 2020 tornado outbreak, Apr 12–13, 2020

Chapter 3 · Alabama

The storms move into Alabama.

The largest hail reported: 1.75 in near Walnut Grove, AL.

23:07UTC · Sun, Apr 12, 2020 · 6:07 PM CDT

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Replay of past events. For current weather and warnings, see weather.gov. Links are rule-based facts. About and credits

Replay · TO20200412

Easter 2020 tornado outbreak: the story

Apr 12, 12:00 UTC – Apr 13, 14:00 UTC. Radar, severe thunderstorm and tornado warnings, storm reports and ground stops, in order, with 1,235 links that show their evidence.

  • 869 NWS warnings
  • 1,550 storm reports
  • 0 FAA airport programs
  • 121 surveyed tornado tracks
  • 1,235 rule-based links
  • 285,814 customers out at the peak, in South Carolina
  • 258 radar frames

First warnings

Apr 12

  1. NWS Shreveport, LA issues the first Tornado Warning.Replay from here

Mississippi

Apr 12

  1. The strongest tornado, an EF4, touches down: a 68 mi track.Replay from here
  2. NWS Jackson, MS declares a tornado emergency.Replay from here
  3. NWS Jackson, MS declares a tornado emergency.Replay from here
  4. NWS Jackson, MS declares a tornado emergency.Replay from here

Alabama

Apr 12–13

  1. The largest hail reported: 1.75 in at 1 NE Walnut Grove, AL.Replay from here

Overnight

Apr 13

  1. The strongest measured gust: 70 mph at De Witt, AR.Replay from here
  2. Peak outages: 285,814 customers out of power in South Carolina. The most in one county: Mecklenburg County, NC, 47,013 out (share unknown) at 11:45 UTC.Replay from here

How we link records

RuleWhat it checksLinks
R4 solidA storm report inside a warning polygon while it was in effect1,177
R6 solidA surveyed tornado track that began inside a Tornado Warning, with the warning's lead time58

Solid lines mark rules that passed an independent check; dashed lines are context. Links are rule-based facts: each shows two records that overlap in place and time. How we know

Where this storm's data comes from

Every layer, the provider behind it and the period it covers.

LayerProviderPeriodRecords
MRMS SeamlessHSRNOAA/NSSL via Iowa Environmental MesonetApr 12, 12:00 UTC – Apr 13, 14:00 UTC258
NWS storm-based warning polygonsNOAA National Weather Service via Iowa Environmental MesonetApr 12, 12:00 UTC – Apr 13, 14:00 UTC869
NWS Local Storm ReportsNOAA National Weather Service via Iowa Environmental MesonetApr 12, 12:00 UTC – Apr 13, 14:00 UTC1,550
ORNL EAGLE-IOak Ridge National LaboratoryApr 12, 12:00 UTC – Apr 13, 14:00 UTC760
  • Radar: NOAA/NSSL MRMS SeamlessHSR, via the Iowa Environmental Mesonet (IEM), Iowa State University
  • Warnings: NOAA/NWS, storm-based polygons via the Iowa Environmental Mesonet
  • Storm reports: NOAA/NWS Local Storm Reports via the Iowa Environmental Mesonet
  • Airport programs: FAA Air Traffic Control System Command Center
  • Tornado tracks: NOAA/NWS Damage Assessment Toolkit damage surveys
  • Power outages: Oak Ridge National Laboratory, EAGLE-I (CC BY 4.0)
  • County boundaries: U.S. Census Bureau