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Winter Storm of March 3–4, 2019

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

Winter Storm of March 3–4, 2019

Winter Storm of March 3–4, 2019

Chapter 2 · The snow totals

17.5 inches at Milford, Massachusetts.

The largest snow report, at 12:00 UTC Mar 4. The low is at its deepest, 985 mb, at 18:00 UTC.

12:00UTC · Mon, Mar 4, 2019 · 7:00 AM EST

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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 · WS20190303

Winter Storm of March 3–4, 2019: the story

Mar 3, 18:00 UTC – Mar 5, 00:00 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 1.29), and ranks it 92nd on its list.

  • 35 NWS warnings
  • 1,962 storm reports
  • 5 WPC surface-low analyses
  • 7 FAA airport programs
  • 8 rule-based links
  • 181 radar frames, 10 min apart

The storm arrives

Mar 3–4

  1. The strongest wind reported: 78 mph at 7 SW Fishermans Island, VA.Replay from here

The snow totals

Mar 4

  1. The largest snow report: 17.5 in at Milford, MA.Replay from here
  2. The low is at its deepest: 985 mb.Replay from here

How we link records

RuleWhat it checksLinks
R4 solidA storm report inside a warning polygon while it was in effect3
R2 dashedAn airport program inside a warning that had been in effect for over 60 min (context)4
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 MesonetMar 3, 18:00 UTC – Mar 5, 00:00 UTC181
NWS storm-based warning polygonsNOAA National Weather Service via Iowa Environmental MesonetMar 3, 18:00 UTC – Mar 5, 00:00 UTC35
NWS Local Storm ReportsNOAA National Weather Service via Iowa Environmental MesonetMar 3, 18:00 UTC – Mar 5, 00:00 UTC1,962
WPC coded surface bulletinsNOAA Weather Prediction Center via Iowa Environmental MesonetMar 3, 18:00 UTC – Mar 5, 00:00 UTC5
NOHRSC snowfallNOAA National Operational Hydrologic Remote Sensing CenterMar 3, 18:00 UTC – Mar 5, 00:00 UTC
FAA airport programs (ground stops and ground delay programs)FAA Air Traffic Control System Command CenterMar 3, 18:00 UTC – Mar 5, 00:00 UTC7
  • 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)