Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_15416002_1 (v_mph_ INTEGER, chi VARCHAR)

### Question ###
What is the maximum miles per hour recorded when the  CHI (Carvill Hurricane Index) is equal to 13.5

### Accurate SQL ###

SELECT MAX(v_mph_) FROM table_15416002_1 WHERE chi = "13.5"