On July 21, an extra-tropical cyclone from the Pacific Ocean started to make a track towards Washington. The storm moved ashore as a weak, disorganized rainstorm on July 22. The storm was quickly discovered on both radar and satellite imagery and was named Alpha. The storm remained over the Canadian-U.S. border over the following hour. Alpha began to intensify quickly late in the morning on July 22. A pressure reading measured a pressure of 1016 millibars near the center of Alpha.