============================================================== SUMMARY: HRRR, June 12, 2019 - present, concatenation of one-hour forecasts anonymous ftp to ftp.arl.noaa.gov and change directory to /archives/hrrr/ ============================================================== ============================================================== HRRR 3 km Forecast Data Archive (sigma-level) Revised: 23 July 2019 Revised: 26 October 2020 for one-hour forecsats Revised: 30 May 2023 for access instructions ________________________________________________________________________________ As of October 26, 2020, this archive was changed to contain the one-hour forecast instead of zero-hour forecasts per the HRRR developers https://rapidrefresh.noaa.gov/hrrr/. See below for dates/times with missing data. ________________________________________________________________________________ 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. 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. It may take a few minutes or longer for the webpage to display. ________________________________________________________________________________ Overview - NOAA ARL began an archive of the one-hour forecast of hourly HRRR 3 km meteorological forecast data from NOAA NCEP on May 30, 2019. Each time period 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: YYYYMMDD_00-05_hrrr Subsequent files that day are named as follows: YYYYMMDD_06-11_hrrr - containing data from 06 - 11z YYYYMMDD_12-17_hrrr - containing data from 12 - 17z YYYYMMDD_18-23_hrrr - containing data from 18 - 23z ________________________________________________________________________________ These files were created by processing NCEP's HYSPLIT-HRRR files obtained from https://nomads.ncep.noaa.gov/pub/data/nccf/com/hysplit/prod/hysplit. beginning June 12, 2019. ________________________________________________________________________________ Additional Data Set Details 3 km lambert conformal grid 1799x1059 points Spatial domain: 12.1381N 122.71902W to 47.8419N 60.9162W 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: 18 SHGT MSLP TPP1 DIFR T02M RH2M U10M V10M PRSS LHTF SHTF USTR RGHS DSWF PBLH TCLD REFC CAPE Upper Levels: 8 TEMP UWND VWND WWND DIFW SPHU TKEN PRES MODEL TYPE: HRRR VERT COORD: 1 POLE LAT: 90.0000 POLE LON: 0.0000 REF LAT: 38.5000 REF LON: 262.5000 REF GRID: 3.0 ORIENTATION: 0. CONE ANGLE: 38.5000 SYNC X: 1. SYNC Y: 1. SYNC LAT: 21.1381 SYNC LON: 237.2810 NUMB X: 1799 NUMB Y: 1059 NUMB LEVELS: 36 ________________________________________________________________________________ Missings: 20190612 00z 20200307 06z-23z 20200308 00z 20200320 00z-23z 20200321 00z 20200328 00z-23z 20200329 00z 20200414 06z-23z 20200415 00z 20200521 00z-23z 20200522 00z 20200525 06z-23z 20200526 00z 20200908 12z-23z 20200909 00z-17z ________________________________________________________________________________