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SUMMARY:
   HRRR, June 15, 2015 - July 23, 2019, concatenation of one-hour forecasts
     ftp://ftp.arl.noaa.gov/archives/hrrr.v1/

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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). 

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			HRRR 3 km Forecast Data Archive 
                          Revised: 10 January 2020  

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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'.  
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These files were created by processing NCEP's HRRR grib files obtained from 
https://nomads.ncep.noaa.gov/pub/data/nccf/com/hrrr/prod/
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Additional Data Set Details

	3 km lambert conformal grid 
	1799x1059 points 
	Spatial domain: 12.14N 122.72W to 47.844N 60.9155W
	36 Levels (hPa): 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:           38.5000
	POLE LON:           262.5000
	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:           21.1400
	SYNC LON:           237.2800
	NUMB X:             1799
	NUMB Y:             1059
	NUMB LEVELS:        36