I need to generate ADDM & AWR report for June 9 5:50pm to 6:40pm. my snapshot available is only up to June 19, 2016 11am

Checked from google but all is see are examples to run the awwrpt.sql but does not show to give date not covered by retention.
my dba_history_snapshot min id is just 11 snapshots from june 19 - 11 hours.

Please advise if you know work around. Thanks in advance.