AN A320 EXPERIENCED MULTIPLE FAULTS FOLLOWING AN ADR #1 FAULT. CREW DECLARED AN EMER AND CONTINUED AT ALTERNATE LAW. THE ACFT LANDED IN DIRECT LAW.

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ON CLBOUT; GOT AN ADR #1 FAULT; AUTOPLT OFF; AUTOTHROTTLE OFF; GPWS SYS INOP; AUTOFLT YAW DAMPER SYS; AUTOFLT RUDDER TRIM SYS; FLT CTL ALTERNATE LAW (PROT LOST) ECAMS. FO WAS FLYING AND CONTINUED FLYING MANUALLY. I DID ECAM PROCS INCLUDING; TURN OFF ADR #1 SWITCH CAPT AIR DATA TO CAPT 3. RESET FAC 1+2; GPWS SYS SWITCH OFF. NONE OF THE ECAM ACTIONS IMPROVED THE FLT STATUS OF THE ACFT. CONTACTED DISPATCH AND MAINT. COORD WITH MAINT TO REMEDY SIT BUT NO HELP. COORD WITH DISPATCH AND DETERMINED RETURN WAS BEST COURSE DUE TO WX AT ZZZ1. FO COORD RETURN WITH ATC AND DECLARED EMER. I REVIEWED THE ECAM STEPS AND THE LNDG IN DIRECT LAW CHKLIST AND DETERMINED APCH SPDS. WE HAD PURSER COME TO COCKPIT AND COORD A CABIN ADVISORY WITH HIM. HE RETURNED TO CABIN AND INFORMED THE REST OF THE CREW. I THEN INFORMED PAX ON THE SIT AND PLANS. WE THEN XFERRED ACFT CTL AND FO REVIEWED THE ECAM AND THE CHKLISTS. WE REQUESTED RWY 34L AND FLEW A RAW DATA ILS AND LANDED UNEVENTFULLY. TAXIED TO THE GATE AND DEBRIEFED MAINT. WX ON DEP WAS WIDESPREAD RAIN SHOWERS. CONTINUOUS LIGHT CHOP WITH OCCASIONAL MODERATE. WE ALSO HAD INTERMITTENT ST ELMO'S FIRE. SUPPLEMENTAL INFO FROM ACN 659725: MAINTAINING AIRSPD; ALT AND COURSE BECAME CHALLENGING IN IMC WITH LIGHT TO OCCASIONAL MODERATE CHOP. THE ACFT WAS IN ALTERNATE LAW WITH NO FLT DIRECTOR OR VSI AND REQUIRED MANUAL TRIMMING.