{"title":"Records on 04-20 in past years","description":"Record events on 04-20 across the years in the data.","dataAsOf":"2026-10-17T00:00:00Z","lastRevised":"2026-10-18","source":"Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products.","licence":"US Government open data (NOAA NCEI)","page":"https://worldextremeweathermonitor.com/on-this-day/04-20/","columns":[{"name":"id","description":"Stable record id: station, date, type and timescale."},{"name":"station_id","description":"GHCN-Daily station id."},{"name":"station_name","description":"Station name."},{"name":"country","description":"ISO 3166 alpha-2 country code."},{"name":"type","description":"Record type: tmax_high, tmax_low, tmin_high, tmin_low, prcp_high, snow_high or snwd_high."},{"name":"timescale","description":"daily, monthly or all-time."},{"name":"date","description":"Date the record was set, YYYY-MM-DD."},{"name":"value","description":"Record value in degrees Celsius or millimetres."},{"name":"unit","description":"c for degrees Celsius, mm for millimetres."},{"name":"previous_value","description":"The record it replaced, in the same unit. Empty for a first record."},{"name":"previous_date","description":"Date of the replaced record."},{"name":"margin","description":"How far the new value beat the old record, a non negative magnitude in the same unit. Zero for a tie."},{"name":"years_stood","description":"Whole years the replaced record had stood."},{"name":"significance","description":"Record Significance Score from 0 to 100 (see /methodology/)."},{"name":"tie","description":"True when the value tied the record."},{"name":"provisional","description":"True while the record is inside the 60 day provisional window."},{"name":"lat","description":"Station latitude in decimal degrees."},{"name":"lon","description":"Station longitude in decimal degrees."}],"rows":[{"id":"USC00268761-2001-04-20-snow_high-monthly","station_id":"USC00268761","station_name":"Virginia 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Stream (Brooklyn)","country":"AU","type":"prcp_high","timescale":"monthly","date":"1990-04-20","value":114.6,"unit":"mm","previous_value":76.7,"previous_date":"1903-04-24","margin":37.9,"years_stood":86,"significance":80,"tie":false,"provisional":false,"lat":-33.025,"lon":149.8788},{"id":"USC00181790-2008-04-20-prcp_high-daily","station_id":"USC00181790","station_name":"Hagerstown 1E","country":"US","type":"prcp_high","timescale":"daily","date":"2008-04-20","value":68.8,"unit":"mm","previous_value":22.6,"previous_date":"1909-04-20","margin":46.2,"years_stood":99,"significance":79,"tie":false,"provisional":false,"lat":39.6403,"lon":-77.6978},{"id":"ASN00050018-1990-04-20-prcp_high-daily","station_id":"ASN00050018","station_name":"Dandaloo (Kelvin)","country":"AU","type":"prcp_high","timescale":"daily","date":"1990-04-20","value":97.8,"unit":"mm","previous_value":29.2,"previous_date":"1891-04-20","margin":68.6,"years_stood":98,"significance":79,"tie":false,"provisional":false,"lat":-32.2884,"lon":147.6671},{"id":"USC00429595-2023-04-20-snwd_high-daily","station_id":"USC00429595","station_name":"Woodruff","country":"US","type":"snwd_high","timescale":"daily","date":"2023-04-20","value":356,"unit":"mm","previous_value":51,"previous_date":"1925-04-20","margin":305,"years_stood":97,"significance":79,"tie":false,"provisional":false,"lat":41.5147,"lon":-111.1594},{"id":"USW00014898-2011-04-20-snwd_high-daily","station_id":"USW00014898","station_name":"Green 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