B737-300
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 183; Flight Crew Type 9600
Troubleshooting; Time Pressure
Aircraft Equipment Problem Critical
Flight Crew Took Evasive Action; Flight Crew Landed in Emergency Condition; Flight Crew FLC complied w / Automation / Advisory; Flight Crew Diverted; General Declared Emergency
Aircraft
Cruising at FL350; the Cabin Altitude Warning Horn sounded and the red; Cabin Pressurization light illuminated.  We donned our oxygen masks and established communication.  Got into the QRH checklist and began an emergency descent to 10;000 feet.  All other systems were operating normally (i.e. bleeds and packs); and no Auto-Fail of the analog pressurization panel.  Diverted to a nearby airport based on fuel status; location; and weather.
During cruise flight; we experienced a Cabin Altitude Warning Horn and associated light. We donned the oxygen masks; established crew communications; and performed an emergency descent commensurate with ATC instructions while in IFR conditions. Upon reaching 10;000 FT; we both noticed that we were experiencing symptoms of hypoxia and later determined that we may have had a slow pressurization leak.
A B737-300 CABIN ALTITUDE Warning Horn sounded and red CABIN PRESS light illuminated; so the crew declared an emergency; completed the QRH and diverted to a nearby airport. Hypoxia symptoms were noted.