area = name asigned to group of RAWS stations
             id_list = a comma-separated list of RAWS stations by WIMS id 
            cat_list = a comma-separated list of WIMS climate/fuel identifiers corresponding to the id_list stations
         weight_list = a comma-separated list of weights to apply to the stations in the id_list 

    the following are optional parameters can be omited if you only want the latest data:
                  DD = day to retreive
                  MM = month to retreive
                yyyy = year to retreive