WRF ARW User's Guide - MMM - UCAR

Description of the Namelist Variables
A. SHARE section
This section describes variables that are used by more than one WPS program. For
example, the wrf_core variable specifies whether the WPS is to produce data for the
ARW or the NMM core – information which is needed by both the geogrid and metgrid
programs.
1. WRF_CORE : A character string set to either 'ARW' or 'NMM' that tells the WPS which
dynamical core the input data are being prepared for. Default value is 'ARW'.
2. MAX_DOM : An integer specifying the total number of domains/nests, including the
parent domain, in the simulation. Default value is 1.
3. START_YEAR : A list of MAX_DOM 4-digit integers specifying the starting UTC
year of the simulation for each nest. No default value.
4. START_MONTH : A list of MAX_DOM 2-digit integers specifying the starting UTC
month of the simulation for each nest. No default value.
5. START_DAY : A list of MAX_DOM 2-digit integers specifying the starting UTC day
of the simulation for each nest. No default value.
6. START_HOUR : A list of MAX_DOM 2-digit integers specifying the starting UTC
hour of the simulation for each nest. No default value.
7. END_YEAR : A list of MAX_DOM 4-digit integers specifying the ending UTC year
of the simulation for each nest. No default value.
8. END_MONTH : A list of MAX_DOM 2-digit integers specifying the ending UTC
month of the simulation for each nest. No default value.
9. END_DAY : A list of MAX_DOM 2-digit integers specifying the ending UTC day of
the simulation for each nest. No default value.
10. END_HOUR : A list of MAX_DOM 2-digit integers specifying the ending UTC hour
of the simulation for each nest. No default value.
11. START_DATE : A list of MAX_DOM character strings of the form 'YYYY-MM-
DD_HH:mm:ss' specifying the starting UTC date of the simulation for each nest. The
start_date variable is an alternate to specifying start_year, start_month,
start_day, and start_hour, and if both methods are used for specifying the starting
time, the start_date variable will take precedence. No default value.
WPS
WRF-ARW V3: User’s Guide 3-37