Answers to Exercises from Session 3

Answers to Exercises from Session 3

These are the answers to the exercises from the previous page. Feel free to ask a MET representative if you have any questions!

ANSWER 3.1: accum_3hr - Build a 3 Hour Accumulation Instead of 6

Instructions: Modify the METplus configuration files to build a 3 hour accumulation instead of a 6 hour accumulation from forecast data using Pcp-Combine in the HREF MEAN vs. MRMS QPE example. Then compare 3 hour accumulations in the forecast and observation data with grid_stat.

Answer: In the user_config/qpf-ensemble.accum_3hr.conf file, change the following variables in the [config] section: 

Change:

To:

Change:

To:

ANSWER 3.2: input_1hr - Force Pcp-Combine to only use 1 hour accumulation files

Instructions: Modify the METplus configuration files to force Pcp-Combine to use six 1 hour accumulation files instead of one 6 hour accumulation file of observation data in the PHPT vs. StageIV GRIB example.

Answer: In the user_config/qpf-prob.input_1hr.conf file, add the following variable to the [config] section: