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Late April 2024 tornado outbreak, Apr 26–28, 2024

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forty°seventy

Late April 2024 tornado outbreak, Apr 26–28, 2024

Late April 2024 tornado outbreak, Apr 26–28, 2024

Chapter 3 · Iowa

Hail and tornadoes into Iowa.

The largest hail reported: 3 in at Mount Ayr, IA.

00:45UTC · Sat, Apr 27, 2024 · 7:45 PM CDT Fri

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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 · TO20240426

Late April 2024 tornado outbreak: the story

Apr 26, 15:00 UTC – Apr 28, 08:00 UTC. Radar, severe thunderstorm and tornado warnings, storm reports and ground stops, in order, with 533 links that show their evidence.

  • 940 NWS warnings
  • 622 storm reports
  • 4 FAA airport programs
  • 114 surveyed tornado tracks
  • 533 rule-based links
  • 46,863 customers out at the peak, in Texas
  • 411 radar frames

First warnings

Apr 26

  1. NWS Dallas/Fort Worth, TX issues the first Tornado Warning.Replay from here

Nebraska

Apr 26–27

  1. The strongest tornado, an EF4, touches down: a 32 mi track.Replay from here
  2. NWS Omaha / Valley, NE declares a tornado emergency.Replay from here
  3. Peak outages: 46,863 customers out of power in Texas. The most in one county: Carter County, OK, 16,525 out (55% of its customers) at 06:30 UTC on Apr 28.Replay from here

Iowa

Apr 27

  1. The largest hail reported: 3 in at Mount Ayr, IA.Replay from here

Oklahoma

Apr 27–28

  1. The strongest measured gust: 78 mph at 4 W Rotan, TX.Replay from here

How we link records

RuleWhat it checksLinks
R4 solidA storm report inside a warning polygon while it was in effect478
R6 solidA surveyed tornado track that began inside a Tornado Warning, with the warning's lead time51
R2 dashedAn airport program inside a warning that had been in effect for over 60 min (context)1
R1c solidA weather airport program inside a convective warning or watch, within 60 min of issuance3

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 26, 15:00 UTC – Apr 28, 08:00 UTC411
NWS storm-based warning polygonsNOAA National Weather Service via Iowa Environmental MesonetApr 26, 15:00 UTC – Apr 28, 08:00 UTC940
NWS Local Storm ReportsNOAA National Weather Service via Iowa Environmental MesonetApr 26, 15:00 UTC – Apr 28, 08:00 UTC622
FAA airport programs (ground stops and ground delay programs)FAA Air Traffic Control System Command CenterApr 26, 15:00 UTC – Apr 28, 08:00 UTC4
ORNL EAGLE-IOak Ridge National LaboratoryApr 26, 15:00 UTC – Apr 28, 08:00 UTC535
  • 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