SR22
Flight Crew Instrument; Flight Crew Private
Flight Crew Last 90 Days 50; Flight Crew Total 2100; Flight Crew Type 65
Communication Breakdown; Other / Unknown
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Weather / Turbulence
Flight Crew Requested ATC Assistance / Clarification; Flight Crew Took Evasive Action
Airspace Structure; Weather
In route back to home airport ZZZ in Aircraft X. Landed at ZZZ1 to let a line of storms pass then filed IFR to ZZZ. Opened IFR in air about 5 miles west of ZZZ1. I requested GPS into ZZZ with possible future request of a contact Approach as another line of storms was moving into approach area of runway 5. Weather was scattered to broken 700 AGL at ZZZ with layer approximately 3;000 MSL. Multiple cells moving through today. I was cleared direct ZZZZZ to begin the GPS 5 approach into ZZZ. Controller never approved my contact Approach request. While on a 240 heading in route to ZZZZZ I began to get in severe turbulence due to nearness of approaching storm and I turned right to a heading of approximately 360 which would intercept the FAF ZZZZZ1 vs. flying full route into worsening weather without telling [ZZZ TRACON] why. I again requested a contact Approach or vectors to final and did not receive either. I do not remember how exactly the rest of communication went with [ZZZ TRACON]. I was able to cancel approach from the air and land at ZZZ. I should have immediately told [ZZZ TRACON] I was deviating due to severe turbulence vs just requesting vectors to final or a contact approach.
SR22 pilot reported deviation for weather and severe turbulence without ATC approval.