Due to the possible severe weather expected between 5-7 pm this evening, branch libraries and the special collections will be closing at 4 pm today. Bizzell Memorial Library will remain open until our normal closing time at 8 pm. All departments in Bizzell will close at 4 pm except for very limited staff in circulation and security. If a tornado warning is issued for the Norman area patrons and staff in Bizzell will be evacuated to lower levels. If Norman continues to be in a tornado warning at 8 pm the library will remain open and the entrance doors will NOT be locked until OUPD has determined that it is safe to close the building.