Complex sentence: Many residents of Pembroke received no warning before the tornadoes moved through the area, the community had received a state grant to purchase a tornado siren but the money had never been allocated leaving the town of 2,784 residents without any warning system.
Split into simpler sentences: Many residents of Pembroke received no warning before the tornadoes moved through the area. The community had received a state grant to purchase a tornado siren, but the money had never been allocated, leaving the town of 2,784 residents without any warning system.