In the coming days we will be seeing a variety of things. One of them will be seeing the ridge of high pressure in the West dissipate and instead be replaced with areas of below average temperatures close to the West Coast. This may be indicative of some storm systems washing shore that would not be able to pump temperatures up. Another big factor that will enhance this dissipating ridge is the potential for another ridge of high pressure to form offshore the US and move towards Alaska. This ridge would therefore defeat the Aleutian semi-permament Low and would have potential to flip things around. This ridge would most likely lead to a trough in the West and a possible ridge in the East if that's how the atmosphere wants to play its games.