{"title":"Mount Helena: threshold days by year","description":"Days at or beyond each fixed threshold at Mount Helena, by year.","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/stations/ASN00009202/thresholds/","columns":[{"name":"threshold","description":"Threshold id, for example tmax_ge_40c."},{"name":"year","description":"Calendar year."},{"name":"days","description":"Days in the year at or beyond the threshold."},{"name":"first","description":"First qualifying date of the year."},{"name":"last","description":"Last qualifying date of the year."},{"name":"longest_streak","description":"Longest run of consecutive qualifying days inside the year."}],"rows":[{"threshold":"prcp_ge_10mm","year":1987,"days":27,"first":"1987-04-08","last":"1987-12-24","longest_streak":3},{"threshold":"prcp_ge_10mm","year":1988,"days":40,"first":"1988-04-28","last":"1988-11-07","longest_streak":3},{"threshold":"prcp_ge_10mm","year":1989,"days":20,"first":"1989-02-25","last":"1989-10-18","longest_streak":2},{"threshold":"prcp_ge_10mm","year":1990,"days":32,"first":"1990-01-29","last":"1990-10-30","longest_streak":3},{"threshold":"prcp_ge_10mm","year":1991,"days":38,"first":"1991-04-10","last":"1991-12-26","longest_streak":4},{"threshold":"prcp_ge_10mm","year":1992,"days":35,"first":"1992-02-09","last":"1992-11-20","longest_streak":3},{"threshold":"prcp_ge_10mm","year":1993,"days":28,"first":"1993-02-07","last":"1993-10-27","longest_streak":2},{"threshold":"prcp_ge_10mm","year":1994,"days":21,"first":"1994-05-23","last":"1994-09-11","longest_streak":3},{"threshold":"prcp_ge_10mm","year":1995,"days":35,"first":"1995-05-10","last":"1995-11-08","longest_streak":3},{"threshold":"prcp_ge_10mm","year":1996,"days":44,"first":"1996-05-08","last":"1996-12-01","longest_streak":5},{"threshold":"prcp_ge_10mm","year":1997,"days":26,"first":"1997-03-30","last":"1997-10-10","longest_streak":7},{"threshold":"prcp_ge_10mm","year":1998,"days":26,"first":"1998-03-10","last":"1998-10-17","longest_streak":4},{"threshold":"prcp_ge_10mm","year":1999,"days":34,"first":"1999-01-05","last":"1999-12-13","longest_streak":3},{"threshold":"prcp_ge_10mm","year":2000,"days":33,"first":"2000-01-07","last":"2000-11-27","longest_streak":4},{"threshold":"prcp_ge_10mm","year":2001,"days":23,"first":"2001-05-06","last":"2001-10-22","longest_streak":3},{"threshold":"prcp_ge_10mm","year":2002,"days":32,"first":"2002-04-17","last":"2002-11-01","longest_streak":3},{"threshold":"prcp_ge_10mm","year":2003,"days":34,"first":"2003-03-30","last":"2003-11-18","longest_streak":4},{"threshold":"prcp_ge_10mm","year":2004,"days":29,"first":"2004-03-02","last":"2004-10-12","longest_streak":3},{"threshold":"prcp_ge_10mm","year":2005,"days":37,"first":"2005-03-28","last":"2005-11-05","longest_streak":7},{"threshold":"prcp_ge_10mm","year":2006,"days":34,"first":"2006-01-03","last":"2006-10-12","longest_streak":2},{"threshold":"prcp_ge_10mm","year":2007,"days":37,"first":"2007-01-03","last":"2007-10-27","longest_streak":3},{"threshold":"prcp_ge_10mm","year":2008,"days":31,"first":"2008-02-07","last":"2008-11-23","longest_streak":2},{"threshold":"prcp_ge_10mm","year":2009,"days":31,"first":"2009-04-19","last":"2009-11-19","longest_streak":4},{"threshold":"prcp_ge_10mm","year":2010,"days":17,"first":"2010-03-23","last":"2010-12-20","longest_streak":5},{"threshold":"prcp_ge_10mm","year":2011,"days":33,"first":"2011-01-04","last":"2011-12-13","longest_streak":7},{"threshold":"prcp_ge_10mm","year":2012,"days":29,"first":"2012-01-20","last":"2012-11-29","longest_streak":3},{"threshold":"prcp_ge_10mm","year":2013,"days":34,"first":"2013-01-07","last":"2013-11-30","longest_streak":2},{"threshold":"prcp_ge_10mm","year":2014,"days":25,"first":"2014-04-27","last":"2014-11-27","longest_streak":2},{"threshold":"prcp_ge_10mm","year":2015,"days":21,"first":"2015-02-02","last":"2015-11-02","longest_streak":3},{"threshold":"prcp_ge_10mm","year":2016,"days":37,"first":"2016-01-20","last":"2016-11-17","longest_streak":3},{"threshold":"prcp_ge_10mm","year":2017,"days":33,"first":"2017-01-30","last":"2017-12-19","longest_streak":3},{"threshold":"prcp_ge_10mm","year":2018,"days":30,"first":"2018-01-16","last":"2018-10-14","longest_streak":4},{"threshold":"prcp_ge_10mm","year":2019,"days":21,"first":"2019-04-16","last":"2019-11-02","longest_streak":3},{"threshold":"prcp_ge_25mm","year":1987,"days":5,"first":"1987-04-25","last":"1987-07-31","longest_streak":1},{"threshold":"prcp_ge_25mm","year":1988,"days":9,"first":"1988-05-13","last":"1988-11-07","longest_streak":3},{"threshold":"prcp_ge_25mm","year":1989,"days":4,"first":"1989-02-25","last":"1989-10-02","longest_streak":1},{"threshold":"prcp_ge_25mm","year":1990,"days":11,"first":"1990-01-29","last":"1990-08-18","longest_streak":2},{"threshold":"prcp_ge_25mm","year":1991,"days":11,"first":"1991-04-10","last":"1991-12-25","longest_streak":2},{"threshold":"prcp_ge_25mm","year":1992,"days":7,"first":"1992-02-09","last":"1992-11-19","longest_streak":1},{"threshold":"prcp_ge_25mm","year":1993,"days":5,"first":"1993-06-27","last":"1993-09-04","longest_streak":1},{"threshold":"prcp_ge_25mm","year":1994,"days":6,"first":"1994-05-23","last":"1994-08-04","longest_streak":2},{"threshold":"prcp_ge_25mm","year":1995,"days":9,"first":"1995-05-10","last":"1995-10-18","longest_streak":3},{"threshold":"prcp_ge_25mm","year":1996,"days":12,"first":"1996-05-31","last":"1996-11-16","longest_streak":5},{"threshold":"prcp_ge_25mm","year":1997,"days":2,"first":"1997-08-04","last":"1997-09-06","longest_streak":1},{"threshold":"prcp_ge_25mm","year":1998,"days":9,"first":"1998-05-09","last":"1998-09-22","longest_streak":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