{"title":"Records on 04-21 in past years","description":"Record events on 04-21 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/04-21/","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":"ASN00028007-2006-04-21-prcp_high-monthly","station_id":"ASN00028007","station_name":"Musgrave","country":"AU","type":"prcp_high","timescale":"monthly","date":"2006-04-21","value":282,"unit":"mm","previous_value":188,"previous_date":"1894-04-16","margin":94,"years_stood":112,"significance":90,"tie":false,"provisional":false,"lat":-14.7803,"lon":143.5036},{"id":"ASN00061050-2015-04-21-prcp_high-all-time","station_id":"ASN00061050","station_name":"Sedgefield (Bundajon)","country":"AU","type":"prcp_high","timescale":"all-time","date":"2015-04-21","value":207.2,"unit":"mm","previous_value":146.8,"previous_date":"1955-02-24","margin":60.4,"years_stood":60,"significance":88,"tie":false,"provisional":false,"lat":-32.4997,"lon":151.2864},{"id":"USC00350265-1988-04-21-prcp_high-monthly","station_id":"USC00350265","station_name":"Arlington","country":"US","type":"prcp_high","timescale":"monthly","date":"1988-04-21","value":37.8,"unit":"mm","previous_value":24.6,"previous_date":"1894-04-26","margin":13.2,"years_stood":93,"significance":87,"tie":false,"provisional":false,"lat":45.7211,"lon":-120.2064},{"id":"USC00127522-2002-04-21-prcp_high-monthly","station_id":"USC00127522","station_name":"Rockville","country":"US","type":"prcp_high","timescale":"monthly","date":"2002-04-21","value":101.6,"unit":"mm","previous_value":59.4,"previous_date":"1918-04-02","margin":42.2,"years_stood":84,"significance":85,"tie":false,"provisional":false,"lat":39.7594,"lon":-87.2269},{"id":"SF001272980-1978-04-21-prcp_high-monthly","station_id":"SF001272980","station_name":"Elliotdale (Tnk)","country":"ZA","type":"prcp_high","timescale":"monthly","date":"1978-04-21","value":160.5,"unit":"mm","previous_value":107.4,"previous_date":"1893-04-11","margin":53.1,"years_stood":85,"significance":83,"tie":false,"provisional":false,"lat":-31.97,"lon":28.68},{"id":"USC00367863-2009-04-21-prcp_high-monthly","station_id":"USC00367863","station_name":"Schenley Lock 5","country":"US","type":"prcp_high","timescale":"monthly","date":"2009-04-21","value":111.8,"unit":"mm","previous_value":67.8,"previous_date":"1937-04-26","margin":44,"years_stood":71,"significance":81,"tie":false,"provisional":false,"lat":40.6831,"lon":-79.6683},{"id":"SF001283140-1978-04-21-prcp_high-all-time","station_id":"SF001283140","station_name":"Notinsila (Bos)","country":"ZA","type":"prcp_high","timescale":"all-time","date":"1978-04-21","value":335,"unit":"mm","previous_value":266.7,"previous_date":"1923-07-20","margin":68.3,"years_stood":54,"significance":81,"tie":false,"provisional":false,"lat":-31.73,"lon":29.18},{"id":"ASN00078078-2017-04-21-prcp_high-daily","station_id":"ASN00078078","station_name":"Kaniva","country":"AU","type":"prcp_high","timescale":"daily","date":"2017-04-21","value":55.4,"unit":"mm","previous_value":22.9,"previous_date":"1895-04-21","margin":32.5,"years_stood":121,"significance":80,"tie":false,"provisional":false,"lat":-36.3725,"lon":141.2427},{"id":"ASN00076065-2017-04-21-prcp_high-daily","station_id":"ASN00076065","station_name":"Walpeup","country":"AU","type":"prcp_high","timescale":"daily","date":"2017-04-21","value":57.8,"unit":"mm","previous_value":19.1,"previous_date":"1914-04-21","margin":38.7,"years_stood":103,"significance":80,"tie":false,"provisional":false,"lat":-35.1362,"lon":142.0246},{"id":"ASN00079036-2017-04-21-prcp_high-daily","station_id":"ASN00079036","station_name":"Natimuk","country":"AU","type":"prcp_high","timescale":"daily","date":"2017-04-21","value":41.4,"unit":"mm","previous_value":15.5,"previous_date":"1914-04-21","margin":25.9,"years_stood":103,"significance":80,"tie":false,"provisional":false,"lat":-36.7416,"lon":141.9429},{"id":"ASN00080024-2017-04-21-prcp_high-daily","station_id":"ASN00080024","station_name":"Kerang (Meran Downs)","country":"AU","type":"prcp_high","timescale":"daily","date":"2017-04-21","value":65.2,"unit":"mm","previous_value":25.4,"previous_date":"1914-04-21","margin":39.8,"years_stood":103,"significance":80,"tie":false,"provisional":false,"lat":-35.8674,"lon":143.8007},{"id":"ASN00019048-2010-04-21-prcp_high-daily","station_id":"ASN00019048","station_name":"Wilmington","country":"AU","type":"prcp_high","timescale":"daily","date":"2010-04-21","value":54.6,"unit":"mm","previous_value":9.9,"previous_date":"1909-04-21","margin":44.7,"years_stood":100,"significance":80,"tie":false,"provisional":false,"lat":-32.6521,"lon":138.1003},{"id":"MD000033815-2017-04-21-prcp_high-daily","station_id":"MD000033815","station_name":"Kisinev","country":"MD","type":"prcp_high","timescale":"daily","date":"2017-04-21","value":39.9,"unit":"mm","previous_value":15.3,"previous_date":"1917-04-21","margin":24.6,"years_stood":100,"significance":80,"tie":false,"provisional":false,"lat":47.02,"lon":28.87},{"id":"SF000067330-1989-04-21-prcp_high-monthly","station_id":"SF000067330","station_name":"Caledon 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Station","country":"AU","type":"prcp_high","timescale":"daily","date":"2021-04-21","value":75.6,"unit":"mm","previous_value":8.6,"previous_date":"1914-04-21","margin":67,"years_stood":107,"significance":79,"tie":false,"provisional":false,"lat":-18.7194,"lon":144.3181},{"id":"USC00429595-2023-04-21-snwd_high-daily","station_id":"USC00429595","station_name":"Woodruff","country":"US","type":"snwd_high","timescale":"daily","date":"2023-04-21","value":356,"unit":"mm","previous_value":51,"previous_date":"1925-04-21","margin":305,"years_stood":97,"significance":79,"tie":false,"provisional":false,"lat":41.5147,"lon":-111.1594},{"id":"ASN00061014-2015-04-21-prcp_high-monthly","station_id":"ASN00061014","station_name":"Branxton  (Dalwood 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