It's the beginning of monsoon season in New Mexico on July 20, 2015 as Amtrak train No. 4, the Southwest Chief rolls along through the intermediate semaphore signals outside of Wagon Mound on BNSF's Raton Subdivision. The train is running on an approach and will stop at the West Siding Switch Levy up ahead to check the switch before proceeding on towards Raton and eventually Chicago.