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Hurricane Ida, Aug 27–31, 2021

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forty°seventy

Hurricane Ida, Aug 27–31, 2021

Hurricane Ida, Aug 27–31, 2021

Chapter 1 · Approach

Ida heads for the Louisiana coast.

The replay opens as Ida nears the US.

16:50UTC · Fri, Aug 27, 2021 · 11:50 AM CDT

Space play/pause · ←/→ 10 min · Enter opens a link

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

Replay · AL092021

Ida: the story

Aug 27, 16:50 UTC – Aug 31, 05:00 UTC · 35 NHC advisories. Radar, warnings, storm reports, ground stops and SEC filings, in order, with 802 links that show their evidence.

  • 2,442 NWS warnings
  • 1,140 storm reports
  • 36 FAA airport programs
  • 48 8-Ks naming Ida
  • 802 rule-based links
  • 506 radar frames, 10 min apart

Approach

Aug 27–29

  1. The replay opens as the storm nears the US.Replay from here

Landfall

Aug 29

  1. Ida makes landfall Port Fourchon, Louisiana as a category 4 hurricane (130 kt, 931 mb).Replay from hereNHC Tropical Cyclone Report: Hurricane IdaNHC best track (HURDAT2)

Inland

Aug 30–31

The replay window ends before the storm dissipates.

Replay from here

Aftermath

Aug 31–Oct 14

  1. The replay window ends before the storm dissipates.Replay from here
  2. First 8-K naming Ida.
    “FedNat Holding filed an 8-K on 2021-09-01 naming Hurricane Ida”
    Replay from hereWhy linked
  3. The aftermath: 48 8-Ks name Ida after the storm, the last on 2021-10-14.Replay from here

How we link records

RuleWhat it checksLinks
R4 solidA storm report inside a warning polygon while it was in effect722
R3 solidAn SEC 8-K that names the storm48
R2 dashedAn airport program inside a warning that had been in effect for over 60 min (context)25
R1c solidA weather airport program inside a convective warning or watch, within 60 min of issuance3
R1o dashedThe same, for other hazards such as floods4

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 MesonetAug 27, 16:50 UTC – Aug 31, 05:00 UTC506
NWS storm-based warning polygonsNOAA National Weather Service via Iowa Environmental MesonetAug 27, 16:50 UTC – Aug 31, 05:00 UTC2,442
NWS Local Storm ReportsNOAA National Weather Service via Iowa Environmental MesonetAug 27, 16:50 UTC – Aug 31, 05:00 UTC1,140
NHC advisories and best trackNOAA National Hurricane CenterAug 27, 16:50 UTC – Aug 31, 05:00 UTC35
FAA airport programs (ground stops and ground delay programs)FAA Air Traffic Control System Command CenterAug 27, 16:50 UTC – Aug 31, 05:00 UTC36
SEC EDGAR 8-K filingsU.S. Securities and Exchange CommissionAug 27, 16:50 UTC – Aug 31, 05:00 UTC48
  • 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
  • Advisories and best track: NOAA/National Hurricane Center
  • Airport programs: FAA Air Traffic Control System Command Center
  • Filings: U.S. Securities and Exchange Commission EDGAR