{"id":363,"date":"2018-06-12T20:06:51","date_gmt":"2018-06-13T01:06:51","guid":{"rendered":"http:\/\/houstongreenbuilding.com\/?p=363"},"modified":"2018-06-12T20:06:51","modified_gmt":"2018-06-13T01:06:51","slug":"updated-noaa-texas-rainfall-data","status":"publish","type":"post","link":"https:\/\/houstongreenbuilding.com\/?p=363","title":{"rendered":"Updated NOAA Texas Rainfall Data"},"content":{"rendered":"

In September 2018, NOAA is expected to release the Texas volume of its Atlas 14 project. Atlas 14 is a national update of historical rainfall data that began with the Southwestern US in 2004. Originally scheduled to be published last year, the Texas volume was delayed to include data on Hurricane Harvey rainfall and that preliminary data has now been released. The rainfall definition of a 100-year storm for all the Houston-Galveston region has increased significantly. For some areas of Harris County, a 100-year storm will now be defined as 18 inches in 24 hours, an increase of up to seven inches per 24 hours from previous rainfall data (Technical Paper 40 originally published in 1963). NOAA cautions not to use this data for design purposes as it preliminary. FEMA will use the finalized rainfall data to create new flood plain maps, redefining our 100-year and 500-year flood plains, similar to revisions made by the TSARP project after Tropical Storm Allision. The Houston Advanced Research Center has a larger summary of the Atlas 14 progress and Hurricane Harvey impacts on their blog: http:\/\/www.harcresearch.org\/feature\/NOAA_Atlas_14_Updated_Rainfall_Data_Underscore_Challenges_of_Managing#<\/a><\/p>\n

Harris County Harvey data and future infrastructure (presented at Gulf Coast Green):\u00a0https:\/\/www.slideshare.net\/juliekannai\/post-harvey-flood-data-and-the-future-of-resilient-infrastructure<\/a><\/p>\n

Houston Chronicle article about flood plain mapping:\u00a0https:\/\/www.houstonchronicle.com\/news\/politics\/houston\/article\/Nearly-half-of-Harris-County-s-waterways-have-12813461.php<\/a><\/p>\n

Preliminary Texas Volume NOAA Atlas 14:\u00a0http:\/\/www.nws.noaa.gov\/oh\/hdsc\/current-projects\/progress\/201801_HDSC_PR.pdf<\/a><\/p>\n

Harris County Floodplain Regulations Cheat sheet:\u00a0http:\/\/www.eng.hctx.net\/Portals\/23\/Publications\/FPRegs_Cheat_Sheet.pdf<\/a><\/p>\n

\"\"<\/a><\/p>\n

Source: NOAA Hydrometeorological Design Studies Center Quarterly Progress Report, January 2018. Cartographic map showing 100-year 24-hour estimates (in inches) from NOAA ATLAS 14 Vol 11 Version 1<\/p>\n

\"\"<\/a><\/p>\n

Source: NOAA Hydrometeorological Design Studies Center Quarterly Progress Report, January 2018. Map showing differences in 100-year 24-hour estimates (in inches) between NOAA ATLAS 14 Vol 11 Version 1 and TP-40.<\/p>\n

Share this:<\/h3>