update RTMA setup instruction

Externals.cfg

@@ -3,7 +3,7 @@ protocol = git
 repo_url = https://github.com/NOAA-GSL/regional_workflow
 # Specify either a branch name or a hash but not both.
 #branch = feature/RRFS_dev1
-hash = 713008a
+hash = 33fc1c7
 local_path = regional_workflow
 required = True
 

Setup-RTMA.md

@@ -5,26 +5,36 @@ A brief example to set up and run RTMA
 ## 1. clone the ufs-srweather-app repository as follows
 
 ```
-  git clone -b 3DRTMA https://github.com/NOAA-GSL/ufs-srweather-app RTMA
+  git clone https://github.com/NOAA-GSL/ufs-srweather-app RTMA
 ```
 or
 ```
-  git clone -b 3DRTMA git@github.com:NOAA-GSL/ufs-srweather-app RTMA
+  git clone git@github.com:NOAA-GSL/ufs-srweather-app RTMA
   ```
 
-## 2. checkout external components
+## 2. checkout target branch/tag/hash
+For example, checkout a branch:
+```
+  git checkout feature/RRFS_dev1
+```
+or checkout a tag:
+```
+  git checkout rtma.v0.3.0
+```
+
+## 3. Get external components
 ```
 cd RTMA
-./get_rtma
+./manage_externals/checkout_externals
 ```
 
-## 3. build executables
+## 4. build executables
 ```
 cd RTMA
 ./devbuild.sh 
 ```
 
-## 4. generate a RTMA workflow
+## 5. generate a RTMA workflow
 ```
 cd RTMA
 source env/wflow_jet.env (use other wflow files for different platforms)
@@ -34,11 +44,11 @@ vi config.sh (modify EXPT_BASEDIR, STMP, PTMP and other variables accordingly)
 ./generate_FV3LAM_wflow.sh
 ```
 
-## 5. run the RTMA workflow
+## 6. run the RTMA workflow
 
-Follow the instructions printed out from step 4 to set up a cron job to run the generated RTMA workflow
+Follow the instructions printed out from step 5 to set up a cron job to run the generated RTMA workflow
 
-## 6. More
+## 7. More
 Reference the following documentation for more
 
 https://github.com/NOAA-GSL/ufs-srweather-app/blob/feature/RRFS_dev1/Setup-RRFS.md