The California-Nevada River Forecast Center, a branch of the National Weather Service, produced the eye-popping image below. It is a forecast of rainfall in Northern California for the next five days, ending Monday, Dec. 3, 2012, at 4 a.m.
The scale at the top is in inches. It indicates that the most intense rainfall for interior California is expected in Shasta, Tehama, Butte and Plumas counties.
The image will evolve as the forecast changes day-to-day at the link above. Shorter-duration forecasts are also available.
CAPTION: 5-day rainfall forecast for Northern California through 4 a.m. on Monday, Dec. 3, 2012. Scale at the top is in inches. Source: California-Nevada River Forecast Center