After above average rain and snowfall in February, the sun is starting to shine more in the month of March with warmer temperatures. The spring-like conditions this early are a concern for the Bureau of Reclamation. “We think of the April through the July period as the snowmelt runoff period. At our basin in the upper San Joaquin River we get two-thirds of our run comes during the snowmelt season,” said Michael Jackson, Bureau of Reclamation.