rockies. we expect temperatures to stay can cool. 74 for denver. you can sigh how the cool wither stays predominantly over the western u.s. while we warm up in the east. isa, back to you. >> thank you very much, derek. the oil spill in california appears to spread south. showing up on san diego county beaches. booms have been deployed and tests are underway to see if they are from the orange county spill. a small split in an under say p -- undersea pipe has released crude into the ocean. cnn has more on the investigation into the cause of that oil spill. >> reporter: we are getting new information and new images. the coast guard providing under water video that shows that 13-inch split in the pipeline. the c.e.o. of amplify energy describing that pipeline like a bow string, and the preliminary report in this investigation showing that it was the anchor of a passing ship that hooked