A319 Captain reported while deviating around thunderstorms at cruise altitude; the aircraft was stuck by lightening resulting in the failure of the onboard weather radar. The Captain proceeded away from the area of thunderstorms; then diverted to an alternate airport.

Narrative

While deviating right (East) via a reroute for weather displayed by onboard weather RADAR; ATC; and WSI (Weather App); we encountered two nearby lightning events; one of which appeared to the crew to have struck the aircraft. We lost our weather RADAR capability as a result. We [requested priority handling] and proceeded due East to evaluate the situation and exit the threat area. After crew and dispatch coordination; we decided to divert to ZZZ. We were in high level clouds with light precipitation and light chop at the time of the event. Onboard sources seemed to indicate we were approximately 25 NM clear of convective activity; but we were flying on the downwind side of the storms. We would have had to travel a significantly further distance to deviate West; but likely achievable with our fuel state.