Basemap showing the locations of two television station purchased radars (KPIX and KGO), as well as HMT instrumentation deployed as part of this project to help calibrate the KPIX radar and evaluate the benefit of incorporating KPIX radar data into a precipitation estimation tool used by the National Weather Service Forecast Office in Monterey, California.
Basemap showing the locations of two television station purchased radars (KPIX and KGO), as well as HMT instrumentation deployed as part of this project to help calibrate the KPIX radar and evaluate the benefit of incorporating KPIX radar data into a precipitation estimation tool used by the National Weather Service Forecast Office in Monterey, California.
The current minimum temperature forecast grid (left) is too coarse to support a vintner's specific frost protection sprinkling actions. A downscaled and bias corrected minimum temperature grid (right) is designed to provide improved guidance for frost protection actions for individual wineries.
The current minimum temperature forecast grid (left) is too coarse to support a vintner's specific frost protection sprinkling actions. A downscaled and bias corrected minimum temperature grid (right) is designed to provide improved guidance for frost protection actions for individual wineries.
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Contact:  Allen White
March 5, 2012

Improving Precipitation and Frost Information for Sonoma County

Sonoma County, California, in the Russian River Basin, is well-known for its wine production. Its environmental conditions are optimum to support growth of a variety of wine grapes. But because the vines are sensitive to weather changes, crops can be at risk, especially if there is too much rain or if frost shows up early. A new project focused on this region will demonstrate two aspects of HMT technology advances. The project, approved by the primary sponsor – the Sonoma County Water Agency (SCWA), will involve development of high resolution precipitation and frost information products needed for improved water management in the basin.

The Russian River basin is located in a radar "shadow", which limits the accuracy of rainfall estimations. HMT has previously demonstrated that installing additional gap-filling radars and other precipitation sensors, along with high resolution numerical weather modeling and information systems can improve tracking and forecasting of heavy precipitation events coming from the ocean and across the coastal mountains. Research and product development for this project will help provide improved precipitation estimates and forecasts. These advances could be implemented regionally with current National Weather Service watch and warning systems, and would support SCWA efforts to deal with storm runoff, river flooding and water supply management issues.

In addition to improved precipitation information, HMT will develop a high resolution frost forecast 'proof-of-concept'. Improved monitoring and prediction of frost conditions will help the agricultural community and SCWA to better determine the need for crop protection and help manage water resources more effectively.


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