Overview
The Geo-Fluid Dynamics Laboratory (GFDL) Hurricane (HCN) model network is run on an "on demand" basis. The decision to run the model rests with the Senior Duty Meteorologist (SDM), with input from the Tropical Prediction Center (TPC). When the GFDL HCN model is run, it starts from the same analysis initial conditions as the AVN run and shares the same data cutoff time. The GFDL HCN model is used for hurricane tracking and, occassionaly, for heavy precipitation forecasting. This model is run four (4) cycles per day for a maximum of four (4) storm per cycle.
Job Names
huribm00 700_00 thru 719_00, hur_00_ocean_spinup,
hur1_00_pre_master, hur1_00_pre_ocean, hur1_00_pre_atmos, hur1_00_fcst, hur1_00_earlypost, hur1_00_post, hur1_gempak_00, hur1_gempak_meta_00,
hur2_00_pre_master, hur2_00_pre_ocean, hur2_00_pre_atmos, hur2_00_fcst, hur2_00_earlypost, hur2_00_post, hur2_gempak_00, hur2_gempak_meta_00,
hur3_00_pre_master, hur3_00_pre_ocean, hur3_00_pre_atmos, hur3_00_fcst, hur3_00_earlypost, hur3_00_post, hur3_gempak_00, hur3_gempak_meta_00,
hur4_00_pre_master, hur4_00_pre_ocean, hur4_00_pre_atmos, hur4_00_fcst, hur4_00_earlypost, hur4_00_post, hur4_gempak_00, hur4_gempak_meta_00huribm06 700_06 thru 719_06,
hur1_06_pre_master, hur1_06_pre_ocean, hur1_06_pre_atmos, hur1_06_fcst, hur1_06_post, hur1_gempak_06, hur1_gempak_meta_06,
hur2_06_pre_master, hur2_06_pre_ocean, hur2_06_pre_atmos, hur2_06_fcst, hur2_06_post, hur2_gempak_06, hur2_gempak_meta_06,
hur3_06_pre_master, hur3_06_pre_ocean, hur3_06_pre_atmos, hur3_06_fcst, hur3_06_post, hur3_gempak_06, hur3_gempak_meta_06,
hur4_06_pre_master, hur4_06_pre_ocean, hur4_06_pre_atmos, hur4_06_fcst, hur4_06_post, hur4_gempak_06, hur4_gempak_meta_06huribm12 700_00 thru 719_00,
hur1_12_pre_master, hur1_12_pre_ocean, hur1_12_pre_atmos, hur1_12_fcst, hur1_12_earlypost, hur1_12_post, hur1_gempak_12, hur1_gempak_meta_12,
hur2_12_pre_master, hur2_12_pre_ocean, hur2_12_pre_atmos, hur2_12_fcst, hur2_12_earlypost, hur2_12_post, hur2_gempak_12, hur2_gempak_meta_12,
hur3_12_pre_master, hur3_12_pre_ocean, hur3_12_pre_atmos, hur3_12_fcst, hur3_12_earlypost, hur3_12_post,hur3_gempak_12, hur3_gempak_meta_12,
hur4_12_pre_master, hur4_12_pre_ocean, hur4_12_pre_atmos, hur4_12_fcst, hur4_12_earlypost, hur4_12_post, hur4_gempak_12, hur4_gempak_meta_12huribm18 700_00 thru 719_00,
hur1_18_pre_master, hur1_18_pre_ocean, hur1_18_pre_atmos, hur1_18_fcst, hur1_18_post, hur1_gempak_18, hur1_gempak_meta_18,
hur2_18_pre_master, hur2_18_pre_ocean, hur2_18_pre_atmos, hur2_18_fcst, hur2_18_post, hur2_gempak_18, hur2_gempak_meta_18,
hur3_18_pre_master, hur3_18_pre_ocean, hur3_18_pre_atmos, hur3_18_fcst, hur3_18_post, hur3_gempak_18, hur3_gempak_meta_18,
hur4_18_pre_master, hur4_18_pre_ocean, hur4_18_pre_atmos, hur4_18_fcst, hur4_18_post, hur4_gempak_18, hur4_gempak_meta_18
Purpose of Jobs in Suite
- Jobs 712_00/06/12/18 are run at 00Z, 06Z, 12Z and 18Z, respectively. These jobs generate the following bulletins: ISXA40, ISXB40, ISXC40, ISXD40, ISXI40, ISXJ40, ISXK40, and ISXL40. These bulletins contain cyclone position and intensity data in BUFR format.
- Job hur_ocean_00 is run once per day, which is at 00Z only. Ths job is released as soon as the 00Z AVN Global Spectral model's analysis files (gblav.t00z.sanl and gblav.t00z.sfcanl) have been created (by AVNIBM00 network job 532_00) and post processed (by AVNIBM00 network job 612_00). This job reads in sea surface temperature (SST) and land-sea mask data fro the AVN run and uses that data to initialize an ocean model. The ocean model then runs for a period of 2 days for each of 3 different regions (weatern atlantic, gulf and eastern atlantic) the Atlantic basin, creating a base ocean state that will be used by all GFDL forecast models that run that day.
- Jobs hurx_yy_pre_master (x being 1, 2, 3 or 4 -- which indicates the storm number) (yy being 00, 06, 12, 18 -- which indicates the run cycle) are run at 00Z, 06Z, 12Z and 18Z. These jobs determine which storm is to be run, then it parses apart the TC vitals file from TPC to gather various bits of storm information and calculate the western boundary of the model's integration domain for this run.
- Jobs hurx_yy_pre_ocean (x being 1, 2, 3 or 4 -- which indicates the storm number) (yy being 00, 06, 12, 18 -- which indicates the run cycle) are run at 00Z, 06Z, 12Z and 18Z. These jobs determine which ocean model region will be used, based on the current storm position and previous storm motion. This job also runs an ocean model for a period of 2 days. The ocean model reads in TC vital records from the last several days to obtain past track and intensity information. This information is used by the model to generate a file that contains a path of colder sea surface temperatures (SSTs) in the wake of the storm.
- Jobs hurx_yy_pre_atmos (x being 1, 2, 3 or 4 -- which indicates the storm number) (yy being 00, 06, 12, 18 -- which indicates the run cycle) are run at 00Z, 06Z, 12Z and 18Z. These jobs blend the output ocean data with the atmospheric data. When necessary, bogus vortex is created by these jobs. Each job requires 6 nodes, 22 processors (5 nodes using all 4 processors and 1 node using 2 processors).
- Jobs hurx_yy_fcst (x being 1, 2, 3 or 4 -- which indicates the storm number) (yy being 00, 06, 12, 18 -- which indicates the run cycle) are run at 00Z, 06Z, 12Z and 18Z. These jobs generate a 126 hour (at 00Z and 12Z) and a 78 hour (at 06Z and 18Z) hurricane forecast. All Eastern Pacific storms run the UNcoupled hurricane model and all Atlantic storms run the coupled hurricane model. Each job requires 11 nodes, 43 processors (10 nodes using all 4 processors and 1 node using 3 processors).
- Jobs hurx_yy_earlypost (x being 1, 2, 3 or 4 -- which indicates the storm number) (yy being 00 or 12 -- which indicates the run cycle) are run at 00Z and 12Z, respectively. These jobs create a metafile showing a swath of the maximum low-level wind from the hurricane model levels 15 and 18.
- Jobs hurx_yy_post (x being 1, 2, 3 or 4 -- which indicates the storm number) (yy being 00, 06, 12, 18 -- which indicates the run cycle) are run at 00Z, 06Z, 12Z and 18Z. These jobs create GRIB files that are 1/3-, 1/6-, and 1-degree. This job also generates an independent storm track, which is very useful for cases near mountainous terrain. Each job requires 6 nodes, 22 processors (5 nodes using all 4 processors and 1 node using 2 processors).
- Jobs hurx_gempak_yy (x being 1, 2, 3 or 4 -- which indicates the storm number) (yy being 00, 06, 12, 18 -- which indicates the run cycle) are run at 00Z, 06Z, 12Z and 18Z. These jobs convert hurricane forecast GRIB files into GEMPAK grids.
- Jobs hurx_gempak_meta_yy (x being 1, 2, 3 or 4 -- which indicates the storm number) (yy being 00, 06, 12, 18 -- which indicates the run cycle) are run at 00Z, 06Z, 12Z and 18Z. These jobs generate hurricane GEMPAK META files for NAWIPS.