================================================================================ SUMMARY: HRRR, June 15, 2015 - July 23, 2019, concatenation of one-hour forecasts anonymous ftp to ftp.arl.noaa.gov and change directory to /archives/hrrr/ ================================================================================ Revised: 14 April 2022 Corrected the description of revision on 5 April 2022 below. Additionally, the sync latitude was corrected from 21.1380 to 21.1381 for files from Oct. 1 to Dec. 31, 2016. ================================================================================ Revised: 5 April 2022 Corrected map projection parameters, more specifically, (1) the pole location was changed from lat=38.5, lon=272.5 to lat=90.0, lon=0.0 and (2) the sync lat from 21.1400 to 21.1380 or 21.1381 depending on the data date and cycle. For data from 00z, June 15, 2015 to 12z, August 23, 2016, the sync latitude was changed from 21.1400 to 21.1380. With this correction, the spatial domain became 21.138N 122.72W to 47.8424N 60.9174W. Previously, the domain was 12.14N 122.72W to 47.844N 60.9155W. For data from 13z, August 23, 2016, the sync latitude was revised to 21.1381. The spatial domain became 21.1381N 122.72W to 47.8425N 60.9173W. Files containing data from other than one-hour forecasts are listed below. ================================================================================ Revised: 31 March 2022 Missing files were created from GRIB2 files. Files with incorrect size were repaired. See below for lists of recreated and repaired files. Note that the NAMS file that substituted a corrupt HRRR file on 19 May 2020 was replaced with HRRR recreated from GRIB2 files. ================================================================================ Revised: 19 May 2020 The file hysplit.20180312.06z.hrrra was found to be corrupt. It was replaced with an identically named file but with 1-hourly 12-km NAM sigma-level model output (see ftp://ftp.arl.noaa.gov/archives/nams/README.TXT). ================================================================================ ================================================================================ HRRR 3 km Forecast Data Archive (sigma-level) Revised: 10 January 2020 Revised: 31 March 2022 for backfills and corrections Revised: 5 April 2022 for map projection parameters Revised: 14 April 2022 for map projection parameters Revised: 31 May 2023 for access instructions ________________________________________________________________________________ Access - The HRRR archive may be accessed by a ftp client or by a web browser: 1) If you want to use a ftp client, Windows PC users may use WinSCP, FileZilla, etc. that support passive mode. MacOS and Linux users may use the ftp command. Connect your ftp client to ftp.arl.noaa.gov using anonymous and your email address for the username and password, respectively and change directory to /archives/hrrr.v1. Note if you are using multiple ftp connections, limit the number of concurrent connections equal to or less than two. Otherwise, your access to our ftp server may be blocked off. 2) If you are using a web browser, point it to https://www.ready.noaa.gov/data/archives/hrrr.v1. It may take a few minutes or longer for the webpage to display. ________________________________________________________________________________ Overview - NOAA ARL began an archive of the first hour of hourly HRRR 3 km meteorological data from NOAA NCEP in June 2015. Each 1 hour forecast is concatenated to create a 6 hour data file beginning with 00z - 05z in the first file of the day. The first file of the day is called: hysplit.YYYYMMDD.00z.hrrra Subsequent files that day are named as follows: hysplit.YYYYMMDD.06z.hrrra - containing data from 06 - 11z hysplit.YYYYMMDD.12z.hrrra - containing data from 12 - 17z hysplit.YYYYMMDD.18z.hrrra - containing data from 18 - 23z NOTE: The Total Kinetic Energy (TKEN) field is zero from the initial date of the archive through the 12 UTC August 23, 2016 data set. The TKE field is available beginning at 18 UTC on August 23, 2016. NOTE: The pressure values are occasionally zero in the upper atmosphere (between about 100-200 mb) for the two-day period 20180831 and 20180901. This was discovered through use of the HYSPLIT utility program 'profile'. ________________________________________________________________________________ These files were created by processing NCEP's HRRR grib files obtained from https://nomads.ncep.noaa.gov/pub/data/nccf/com/hrrr/prod/ ________________________________________________________________________________ Additional Data Set Details 3 km lambert conformal grid 1799x1059 points Spatial domain: 12.138N 122.72W to 47.8424N 60.9174W 36 sigma levels: 1.0 0.9990 0.9960 0.9905 0.9810 0.9670 0.9490 0.9275 0.9040 0.8785 0.8500 0.8185 0.7840 0.7465 0.7060 0.6625 0.6160 0.5670 0.5195 0.4767 0.4385 0.4041 0.3729 0.3449 0.3198 0.2767 0.2412 0.2118 0.1836 0.1553 0.1271 0.0989 0.0718 0.0527 0.0304 0.0124 Sfc Variables: 24 SHGT PRSS MSLP TPP1 DIFR T02M DP2M PBLH DSWF ULWF U10M V10M VSBY CSNO CICE CFZR CRAI LIB4 CAPE CINH TCLD REFC CLDB CLDT Upper Levels: 8 PRES TEMP UWND VWND WWND DIFW SPHU TKEN MODEL TYPE: HRRR VERT COORD: 1 POLE LAT: 90.0000 POLE LON: 0. REF LAT: 38.5000 REF LON: 262.500 REF GRID: 3.0 ORIENTATION: 0. CONE ANGLE: 38.5000 SYNC X: 1. SYNC Y: 1. SYNC LAT: 21.1380 (or 21.1381 from 13z, August 23, 2016) SYNC LON: 237.280 NUMB X: 1799 NUMB Y: 1059 NUMB LEVELS: 36 ________________________________________________________________________________ Backfilled (68 files as of March 31, 2022): hysplit.20150807.18z.hrrra hysplit.20150808.00z.hrrra hysplit.20150808.06z.hrrra hysplit.20150808.12z.hrrra hysplit.20150808.18z.hrrra hysplit.20150919.00z.hrrra hysplit.20150919.06z.hrrra hysplit.20150919.12z.hrrra hysplit.20150919.18z.hrrra hysplit.20150920.00z.hrrra hysplit.20150920.06z.hrrra hysplit.20150920.12z.hrrra hysplit.20150920.18z.hrrra hysplit.20150921.00z.hrrra hysplit.20150921.06z.hrrra hysplit.20150921.12z.hrrra hysplit.20150921.18z.hrrra hysplit.20150922.00z.hrrra hysplit.20150922.06z.hrrra hysplit.20151009.18z.hrrra hysplit.20151010.00z.hrrra hysplit.20151010.06z.hrrra hysplit.20151010.12z.hrrra hysplit.20151010.18z.hrrra hysplit.20151011.00z.hrrra hysplit.20151011.06z.hrrra hysplit.20151011.12z.hrrra hysplit.20151011.18z.hrrra hysplit.20151012.00z.hrrra hysplit.20151012.06z.hrrra hysplit.20151012.12z.hrrra hysplit.20151012.18z.hrrra hysplit.20151013.00z.hrrra hysplit.20151013.06z.hrrra hysplit.20151013.12z.hrrra hysplit.20151013.18z.hrrra hysplit.20151014.00z.hrrra hysplit.20151014.06z.hrrra hysplit.20151014.12z.hrrra hysplit.20151014.18z.hrrra hysplit.20151102.06z.hrrra hysplit.20151112.12z.hrrra hysplit.20160404.06z.hrrra hysplit.20160513.00z.hrrra hysplit.20160624.00z.hrrra hysplit.20160624.12z.hrrra hysplit.20160827.18z.hrrra hysplit.20160828.00z.hrrra hysplit.20160828.06z.hrrra hysplit.20160828.12z.hrrra hysplit.20160828.18z.hrrra hysplit.20160829.00z.hrrra hysplit.20161202.18z.hrrra hysplit.20161209.06z.hrrra hysplit.20170726.06z.hrrra hysplit.20171218.12z.hrrra hysplit.20180206.00z.hrrra hysplit.20180502.12z.hrrra hysplit.20180507.12z.hrrra hysplit.20180528.00z.hrrra hysplit.20180528.06z.hrrra hysplit.20180718.06z.hrrra hysplit.20180821.06z.hrrra hysplit.20190124.12z.hrrra hysplit.20190125.00z.hrrra hysplit.20190126.06z.hrrra hysplit.20190131.18z.hrrra hysplit.20190201.18z.hrrra Recreated to correct file size (88 files as of March 31, 2022): hysplit.20150804.18z.hrrra hysplit.20150809.00z.hrrra hysplit.20150810.18z.hrrra hysplit.20150818.18z.hrrra hysplit.20150912.00z.hrrra hysplit.20151015.00z.hrrra hysplit.20151103.06z.hrrra hysplit.20151113.12z.hrrra hysplit.20151130.12z.hrrra hysplit.20160311.12z.hrrra hysplit.20160315.12z.hrrra hysplit.20160405.06z.hrrra hysplit.20160406.18z.hrrra hysplit.20160512.12z.hrrra hysplit.20160513.06z.hrrra hysplit.20160514.00z.hrrra hysplit.20160518.18z.hrrra hysplit.20160608.06z.hrrra hysplit.20160610.06z.hrrra hysplit.20160625.00z.hrrra hysplit.20160625.12z.hrrra hysplit.20160823.12z.hrrra hysplit.20160823.18z.hrrra hysplit.20160824.00z.hrrra hysplit.20160824.06z.hrrra hysplit.20160824.12z.hrrra hysplit.20161013.06z.hrrra hysplit.20161017.18z.hrrra hysplit.20161026.18z.hrrra hysplit.20161203.00z.hrrra hysplit.20161203.18z.hrrra hysplit.20161207.06z.hrrra hysplit.20161208.06z.hrrra hysplit.20161210.06z.hrrra hysplit.20161211.00z.hrrra hysplit.20170311.00z.hrrra hysplit.20170313.06z.hrrra hysplit.20170727.06z.hrrra hysplit.20170829.00z.hrrra hysplit.20170929.06z.hrrra hysplit.20171106.12z.hrrra hysplit.20171212.12z.hrrra hysplit.20180312.06z.hrrra hysplit.20180502.18z.hrrra hysplit.20180503.12z.hrrra hysplit.20180506.00z.hrrra hysplit.20180508.12z.hrrra hysplit.20180510.06z.hrrra hysplit.20180511.06z.hrrra hysplit.20180528.12z.hrrra hysplit.20180529.00z.hrrra hysplit.20180610.18z.hrrra hysplit.20180829.12z.hrrra hysplit.20180830.06z.hrrra hysplit.20181130.06z.hrrra hysplit.20181228.18z.hrrra hysplit.20181229.18z.hrrra hysplit.20190124.00z.hrrra hysplit.20190125.06z.hrrra hysplit.20190125.12z.hrrra hysplit.20190125.18z.hrrra hysplit.20190126.00z.hrrra hysplit.20190127.06z.hrrra hysplit.20190128.00z.hrrra hysplit.20190128.06z.hrrra hysplit.20190128.12z.hrrra hysplit.20190128.18z.hrrra hysplit.20190129.00z.hrrra hysplit.20190129.18z.hrrra hysplit.20190130.06z.hrrra hysplit.20190131.00z.hrrra hysplit.20190201.00z.hrrra hysplit.20190202.18z.hrrra hysplit.20190203.12z.hrrra hysplit.20190205.00z.hrrra hysplit.20190205.12z.hrrra hysplit.20190206.00z.hrrra hysplit.20190220.06z.hrrra hysplit.20190221.06z.hrrra hysplit.20190221.12z.hrrra hysplit.20190311.12z.hrrra hysplit.20190404.00z.hrrra hysplit.20190404.12z.hrrra hysplit.20190405.00z.hrrra hysplit.20190407.00z.hrrra hysplit.20190408.06z.hrrra hysplit.20190408.12z.hrrra hysplit.20190419.12z.hrrra Recreated to correct data listing order (4 files as of March 31, 2022): hysplit.20160916.06z.hrrra hysplit.20161209.00z.hrrra hysplit.20190203.00z.hrrra hysplit.20190204.12z.hrrra Files with data from other than one-hour forecasts (25 files, 5 April 2022): hysplit.20150804.18z.hrrra hysplit.20150808.00z.hrrra hysplit.20150818.18z.hrrra hysplit.20150912.00z.hrrra hysplit.20151014.06z.hrrra hysplit.20160311.12z.hrrra hysplit.20160406.18z.hrrra hysplit.20160513.00z.hrrra hysplit.20160610.06z.hrrra hysplit.20160625.12z.hrrra hysplit.20160823.12z.hrrra hysplit.20160823.18z.hrrra hysplit.20160824.00z.hrrra hysplit.20160824.06z.hrrra hysplit.20160824.12z.hrrra hysplit.20160827.18z.hrrra hysplit.20160828.00z.hrrra hysplit.20160828.06z.hrrra hysplit.20160828.18z.hrrra hysplit.20160829.00z.hrrra hysplit.20161209.06z.hrrra hysplit.20161211.00z.hrrra hysplit.20170829.00z.hrrra hysplit.20180506.00z.hrrra hysplit.20180718.06z.hrrra