The target region NOAA 11726 was the source of an M1.0 flare at 10:22 UT yesterday. Since then the region has grown to over 500 uh and is now harboring a large delta spot in its trailing portion. It has also begun to show signs of shearing and H-alpha brightening at the location of the delta. At this time we are implementing a Major Flare Watch due to the increased possibility of an M5 flare or greater over the next 24-48 hours.