{"title":"Records on 04-30 in past years","description":"Record events on 04-30 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/04-30/","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":"ASN00069010-1988-04-30-prcp_high-monthly","station_id":"ASN00069010","station_name":"Braidwood (Wallace 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SW","country":"US","type":"prcp_high","timescale":"monthly","date":"1999-04-30","value":98.8,"unit":"mm","previous_value":51.8,"previous_date":"1914-04-29","margin":47,"years_stood":85,"significance":84,"tie":false,"provisional":false,"lat":36.4661,"lon":-104.9456},{"id":"AJ000037985-2017-04-30-prcp_high-monthly","station_id":"AJ000037985","station_name":"Lankaran","country":"AZ","type":"prcp_high","timescale":"monthly","date":"2017-04-30","value":99.1,"unit":"mm","previous_value":44,"previous_date":"1934-04-28","margin":55.1,"years_stood":83,"significance":84,"tie":false,"provisional":false,"lat":38.75,"lon":48.817},{"id":"USC00238880-2017-04-30-prcp_high-all-time","station_id":"USC00238880","station_name":"W 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City","country":"US","type":"prcp_high","timescale":"all-time","date":"2012-04-30","value":246.4,"unit":"mm","previous_value":146.1,"previous_date":"1967-07-25","margin":100.3,"years_stood":44,"significance":83,"tie":false,"provisional":false,"lat":36.7231,"lon":-97.0903},{"id":"ASN00005020-2005-04-30-prcp_high-monthly","station_id":"ASN00005020","station_name":"Ningaloo","country":"AU","type":"prcp_high","timescale":"monthly","date":"2005-04-30","value":116,"unit":"mm","previous_value":68.8,"previous_date":"1923-04-28","margin":47.2,"years_stood":82,"significance":82,"tie":false,"provisional":false,"lat":-22.6975,"lon":113.6747},{"id":"USC00185111-2014-04-30-prcp_high-daily","station_id":"USC00185111","station_name":"Laurel 3 W","country":"US","type":"prcp_high","timescale":"daily","date":"2014-04-30","value":104.9,"unit":"mm","previous_value":27.9,"previous_date":"1895-04-30","margin":77,"years_stood":118,"significance":80,"tie":false,"provisional":false,"lat":39.0847,"lon":-76.9003},{"id":"USC00147271-2017-04-30-snow_high-daily","station_id":"USC00147271","station_name":"Scott City","country":"US","type":"snow_high","timescale":"daily","date":"2017-04-30","value":229,"unit":"mm","previous_value":0,"previous_date":"1900-04-30","margin":229,"years_stood":116,"significance":80,"tie":false,"provisional":false,"lat":38.4747,"lon":-100.9175},{"id":"USC00344573-2012-04-30-prcp_high-daily","station_id":"USC00344573","station_name":"Jefferson 3SE","country":"US","type":"prcp_high","timescale":"daily","date":"2012-04-30","value":133.3,"unit":"mm","previous_value":50.8,"previous_date":"1904-04-30","margin":82.5,"years_stood":108,"significance":80,"tie":false,"provisional":false,"lat":36.6856,"lon":-97.7486},{"id":"USW00014734-2014-04-30-prcp_high-daily","station_id":"USW00014734","station_name":"Newark Liberty Intl AP","country":"US","type":"prcp_high","timescale":"daily","date":"2014-04-30","value":133.1,"unit":"mm","previous_value":31.8,"previous_date":"1908-04-30","margin":101.3,"years_stood":105,"significance":80,"tie":false,"provisional":false,"lat":40.6828,"lon":-74.1692},{"id":"USC00142835-2012-04-30-prcp_high-daily","station_id":"USC00142835","station_name":"Ft Scott","country":"US","type":"prcp_high","timescale":"daily","date":"2012-04-30","value":123.2,"unit":"mm","previous_value":51.6,"previous_date":"1907-04-30","margin":71.6,"years_stood":105,"significance":80,"tie":false,"provisional":false,"lat":37.8172,"lon":-94.6986},{"id":"USC00116526-2017-04-30-prcp_high-monthly","station_id":"USC00116526","station_name":"Ottawa 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