Provide the code summarization for the weather recorded by the weather station which contained the no.2 store on 2013/2/12.
no.2 store refers to store_nbr = 2; on 2013/2/12 refers to date = '2013-02-12'; code summarization refers to codesum
SELECT T1.codesum FROM weather AS T1 INNER JOIN relation AS T2 ON T1.station_nbr = T2.station_nbr WHERE T1.`date` = '2013-02-12' AND T2.store_nbr = 2