1999 Oldsmobile Alero Olds Alero Will Not Start

Have a '99 Olds Alero I've had for ~6 years now, took it from 40K to over 130K miles.

Had it parked in a lot for ~2 months while driving a work truck every day. When it came time to start it up again it wouldn't start. Boosted it and it ran fine. The wife drove it home and used in infrequently for about two weeks before it refused to start again. Boosted again but didn't keep running. Assuming the battery was shot I bought a new replacement.

Started the car with the new battery and everything seemed to work except the radio and lighter plugs. Drove the car to work for ~1 week and on the way home Friday it made it all of about two miles when it died. Was rolling the windows up, they visibly slowed down during the process, blinkers where giving a slower than normal blink cycle, and then the car lost power completely and died. Got it to the side of the road. Tried restarting with no luck. When key is turned to accessory/on the dash lights up fully and the gauges (temp, tack, etc.) Shoot all the way up and then all the way back down repeatedly. The emergency flashers also go from a slow blink to a rapid blink when the key is turned to accessory.

Tried jumping again, no luck. Replaced the alternator about 5 years ago, seemed to be doing fine up until this most recent adventure. I've checked all the fuses that I can check under the hood and inside the panel on the driver's side. All fuses look fine. I can not check a good number of the fuses under the hood however (no visible fuse to check for a break).

Any help would be greatly appreciated. Thank you.