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Hurricane Nicholas, Sep 12–15, 2021

1 of 2 · The storm's data
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Hurricane Nicholas, Sep 12–15, 2021

Hurricane Nicholas, Sep 12–15, 2021

Chapter 2 · Landfall

Nicholas comes ashore on the Matagorda Peninsula.

A category 1 hurricane at 65 kt and 991 mb, on Sep 14 at 05:30 UTC.

05:30UTC · Tue, Sep 14, 2021 · 12:30 AM 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 · AL142021

Nicholas: the story

Sep 12, 15:00 UTC – Sep 15, 17:30 UTC · 22 NHC advisories. Radar, warnings, storm reports, ground stops and SEC filings, in order, with 171 links that show their evidence.

  • 820 NWS warnings
  • 417 storm reports
  • 13 FAA airport programs
  • 2 8-Ks naming Nicholas
  • 171 rule-based links
  • 448 radar frames, 10 min apart

Approach

Sep 12–13

  1. The replay opens on the first NHC advisory.Replay from here

Landfall

Sep 13–14

  1. Nicholas makes landfall the eastern portion of the Matagorda Peninsula, Texas as a category 1 hurricane (65 kt, 991 mb).Replay from hereNHC Tropical Cyclone Report: Hurricane NicholasNHC best track (HURDAT2)

Inland

Sep 14–15

The replay window ends before the storm dissipates.

Replay from here

Aftermath

Sep 15–Oct 21

  1. The replay window ends before the storm dissipates.Replay from here
  2. First 8-K naming Nicholas.
    “Celanese Corp filed an 8-K on 2021-10-21 naming Hurricane Nicholas”
    Replay from hereWhy linked
  3. The aftermath: 2 8-Ks name Nicholas after the storm, the last on 2021-10-21.Replay from here

How we link records

RuleWhat it checksLinks
R4 solidA storm report inside a warning polygon while it was in effect163
R3 solidAn SEC 8-K that names the storm2
R2 dashedAn airport program inside a warning that had been in effect for over 60 min (context)2
R1c solidA weather airport program inside a convective warning or watch, within 60 min of issuance3
R1o dashedThe same, for other hazards such as floods1

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 MesonetSep 12, 15:00 UTC – Sep 15, 17:30 UTC448
NWS storm-based warning polygonsNOAA National Weather Service via Iowa Environmental MesonetSep 12, 15:00 UTC – Sep 15, 17:30 UTC820
NWS Local Storm ReportsNOAA National Weather Service via Iowa Environmental MesonetSep 12, 15:00 UTC – Sep 15, 17:30 UTC417
NHC advisories and best trackNOAA National Hurricane CenterSep 12, 15:00 UTC – Sep 15, 17:30 UTC22
FAA airport programs (ground stops and ground delay programs)FAA Air Traffic Control System Command CenterSep 12, 15:00 UTC – Sep 15, 17:30 UTC13
SEC EDGAR 8-K filingsU.S. Securities and Exchange CommissionSep 12, 15:00 UTC – Sep 15, 17:30 UTC2
  • 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