As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER BOTH AUTOPILOTS KICKED OFF LINE, BOTH RED HDG FLAGS ILLUMINATED. FIRST OFFICER''S HDG OFF 30 DEGREES; THEN BOTH HDG FLAGS TURNED YELLOW. DIVERTED TO SMF DUE TO WEATHER. ACCOMPLISHED RE-ORIENTATION OF AHRS IAW SKYWEST MM INFORMATION. SYSTEM CHECKS GOOD.