Loading the replay

Blizzard of February 9–10, 2017

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

Blizzard of February 9–10, 2017

Blizzard of February 9–10, 2017

Chapter 1 · First warnings

NWS New York issues the first Blizzard Warning.

At 08:00 UTC Feb 9. Winds reach 71 mph near Calverton, New York, at 16:10 UTC.

16:10UTC · Thu, Feb 9, 2017 · 11:10 AM EST

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 · WS20170209

Blizzard of February 9–10, 2017: the story

Feb 9, 00:00 UTC – Feb 10, 12:00 UTC. Radar showing snow and rain, winter warnings, storm reports and the surface low's track from the Weather Prediction Center, in order. NCEI's Northeast Snowfall Impact Scale rates it Category 1, Notable (NESIS 1.87), and ranks it 71st on its list.

  • 73 NWS warnings
  • 3,161 storm reports
  • 12 WPC surface-low analyses
  • 10 FAA airport programs
  • 1 8-Ks naming the storm
  • 10 rule-based links
  • 217 radar frames, 10 min apart

First warnings

Feb 9

  1. NWS New York, NY issues the first Blizzard Warning.Replay from here
  2. The strongest wind reported: 71 mph at 4 NE Calverton, NY.Replay from here

The bomb

Feb 9–10

  1. Bombogenesis: the low's pressure has fallen 29 mb in 24 hours, to 973 mb.Replay from here
  2. The low is at its deepest: 970 mb.Replay from here

The snow totals

Feb 10

  1. The largest snow report: 24 in at 1 SE Cooper, ME.Replay from here

Aftermath

Feb 10–Mar 10

  1. The aftermath: 1 8-K names the storm after it ended, the last on 2017-03-10.Replay from here

How we link records

RuleWhat it checksLinks
R3 solidAn SEC 8-K that names the storm1
R2 dashedAn airport program inside a warning that had been in effect for over 60 min (context)8
R1c solidA weather airport program inside a convective warning or watch, within 60 min of issuance1

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 MesonetFeb 9, 00:00 UTC – Feb 10, 12:00 UTC217
NWS storm-based warning polygonsNOAA National Weather Service via Iowa Environmental MesonetFeb 9, 00:00 UTC – Feb 10, 12:00 UTC73
NWS Local Storm ReportsNOAA National Weather Service via Iowa Environmental MesonetFeb 9, 00:00 UTC – Feb 10, 12:00 UTC3,161
WPC coded surface bulletinsNOAA Weather Prediction Center via Iowa Environmental MesonetFeb 9, 00:00 UTC – Feb 10, 12:00 UTC12
NOHRSC snowfallNOAA National Operational Hydrologic Remote Sensing CenterFeb 9, 00:00 UTC – Feb 10, 12:00 UTC
FAA airport programs (ground stops and ground delay programs)FAA Air Traffic Control System Command CenterFeb 9, 00:00 UTC – Feb 10, 12:00 UTC10
SEC EDGAR 8-K filingsU.S. Securities and Exchange CommissionFeb 9, 00:00 UTC – Feb 10, 12:00 UTC1
  • 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
  • Storm track: NOAA/NWS Weather Prediction Center coded surface bulletins, via the Iowa Environmental Mesonet
  • Airport programs: FAA Air Traffic Control System Command Center
  • Filings: U.S. Securities and Exchange Commission EDGAR
  • Snowfall: NOAA/NWS National Operational Hydrologic Remote Sensing Center (NOHRSC)