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Winter Storm of March 7–9, 2018

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

Winter Storm of March 7–9, 2018

Winter Storm of March 7–9, 2018

Chapter 1 · The storm takes shape

The storm takes shape off the Mid-Atlantic coast.

The replay opens as the low organizes.

00:00UTC · Wed, Mar 7, 2018 · 7:00 PM EST Tue

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 · WS20180307

Winter Storm of March 7–9, 2018: the story

Mar 7, 00:00 UTC – Mar 9, 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 2, Significant (NESIS 3.45), and ranks it 45th on its list.

  • 154 NWS warnings
  • 2,908 storm reports
  • 15 WPC surface-low analyses
  • 10 FAA airport programs
  • 11 rule-based links
  • 361 radar frames, 10 min apart

The storm takes shape

Mar 7

The replay opens as the low organizes.

Replay from here

The low

Mar 7–8

  1. The low is at its deepest: 986 mb.Replay from here
  2. The strongest wind reported: 59 mph at Mashpee, MA.Replay from here
  3. Bombogenesis: the low's pressure has fallen 18 mb in 24 hours, to 987 mb.Replay from here

The snow totals

Mar 8–9

  1. The largest snow report: 36 in at Woodford, VT.Replay from here

How we link records

RuleWhat it checksLinks
R2 dashedAn airport program inside a warning that had been in effect for over 60 min (context)10
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 MesonetMar 7, 00:00 UTC – Mar 9, 12:00 UTC361
NWS storm-based warning polygonsNOAA National Weather Service via Iowa Environmental MesonetMar 7, 00:00 UTC – Mar 9, 12:00 UTC154
NWS Local Storm ReportsNOAA National Weather Service via Iowa Environmental MesonetMar 7, 00:00 UTC – Mar 9, 12:00 UTC2,908
WPC coded surface bulletinsNOAA Weather Prediction Center via Iowa Environmental MesonetMar 7, 00:00 UTC – Mar 9, 12:00 UTC15
NOHRSC snowfallNOAA National Operational Hydrologic Remote Sensing CenterMar 7, 00:00 UTC – Mar 9, 12:00 UTC
FAA airport programs (ground stops and ground delay programs)FAA Air Traffic Control System Command CenterMar 7, 00:00 UTC – Mar 9, 12:00 UTC10
  • 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)