code: def acis_request(method, params):
      
      base_url = 'http://data.rcc-acis.org/'  # ACIS Web API URL
  
      timeout = 300 if method == 'MultiStnData' else 60
  
      try:
          response = session_manager.create_session().post(base_url + method, json=params,
                                                           timeout=timeout)
          return response.json()
      except requests.exceptions.Timeout:
          raise AcisApiException('Connection Timeout')
      except requests.exceptions.TooManyRedirects:
          raise AcisApiException('Bad URL. Check your ACIS connection method string.')
      except ValueError:
          raise AcisApiException('No data returned! The ACIS parameter dictionary'
                                 'may be incorrectly formatted')
docs: Request data from the ACIS Web Services API.
  
      Makes a request from the ACIS Web Services API for data
      based on a given method (StnMeta,StnData,MultiStnData,GridData,General)
      and parameters string. Information about the parameters can be obtained at:
      http://www.rcc-acis.org/docs_webservices.html
  
      If a connection to the API fails, then it will raise an exception. Some bad
      calls will also return empty dictionaries.
  
      ACIS Web Services is a distributed system! A call to the main URL can be
      delivered to any climate center running a public instance of the service.
      This makes the calls efficient, but also occasionaly results in failed
      calls when a server you are directed to is having problems. Generally,
      reconnecting after waiting a few seconds will resolve a problem. If problems
      are persistent, contact ACIS developers at the High Plains Regional Climate
      Center or Northeast Regional Climate Center who will look into server
      issues.
  
      Parameters
      ----------
      method : str
          The Web Services request method (StnMeta, StnData, MultiStnData, GridData, General)
      params : dict
          A JSON array of parameters (See Web Services API)
  
      Returns
      -------
      A dictionary of data based on the JSON parameters
  
      Raises
      ------
      :class: `ACIS_API_Exception`
          When the API is unable to establish a connection or returns
          unparsable data.