Mountain Rain or Snow

Mountain Rain or Snow

Project Description Tahoe Rain or Snow is growing, and we’ve taken on a new name: Mountain Rain or Snow.  You can help us by sending observations of precipitation during winter storms so that scientists can improve estimates of winter precipitation phase. To get...

North American Monsoon

North American Monsoon

Project Description The North American Monsoon (NAM) is a large-scale feature having a strong impact on summer rainfall patterns and amounts over North America. For example, it supplies about 60%-80%, 45% and 35% of the annual precipitation for northwestern Mexico,...