Greenwire: When a series of powerful January storms dumped huge volumes of rain across the foothills of the Cascade Mountains, Washington’s top geologist, Dave Norman, knew to expect landslides. During the first two weeks of the month, the intense storms pelted the already saturated ground in western Washington, triggering at least 1,500 landslides that damaged or destroyed an estimated 200 homes, buried sections of 150 roadways and contributed to thousands of people seeking safety in emergency …