Great Thunder is the "clandestine musical project by a brother/sister duo currently residing in Rome, New York", consisting of Waxahatchee's Katie Crutchfield (former frontwoman of P.S. Eliot) and her ex-boyfriend Keith Spencer (the bass player from Swearin'). Together, they form a band that throws together the styles of singer-songwriter, indie, garage, punk and experimental rock in their quest to be "anarchic musical Epicureans".
