forecasting with WRF

Good afternoon

Let say i want to use the WRF to create a forecast for the next 3 days,
what should be modified?
where can i get the fnl files from ?

is there a tutorial i can read?

In the data available in the website https://www2.mmm.ucar.edu/wrf/users/download/free_data.html
we have the Realtime Datasets from NOAA, how can they be used?

i followed this online tutorial https://www2.mmm.ucar.edu/wrf/OnLineTutorial/index.php
but have failed to find the connection to how it can be actually used for forecasts?

Hi,
The tutorial website you are following should provide a lot of information for running WRF, and for understanding how the system works; however, here are some additional resources.

WRF Users’ Guide: http://www2.mmm.ucar.edu/wrf/users/docs/user_guide_v4/contents.html

Compilation Tutorial: http://www2.mmm.ucar.edu/wrf/OnLineTutorial/compilation_tutorial.php

Presentations from our WRF tutorial: https://www2.mmm.ucar.edu/wrf/users/tutorial/tutorial_presentation_winter_2020.htm

Technical Note: http://www2.mmm.ucar.edu/wrf/users/docs/technote/contents.html

Best Practice for Namelists (helps you to make good decisions when setting up your domain and namelist settings:
WPS: http://www2.mmm.ucar.edu/wrf/users/namelist_best_prac_wps.html
WRFV3: http://www2.mmm.ucar.edu/wrf/users/namelist_best_prac_wrf.html

(and for other information on downloading, etc. you can see) WRF Users’ Home Page: http://www.mmm.ucar.edu/wrf/users/

To learn how to use the input data, see the tutorial presentations:
WPS Fundamental Capabilities
WPS Set-up and Run