FROST damage can occur in foothill vineyards in Spring and in Fall, and should be a consideration when choosing a vineyard location and appropriate varieties.
Rick Snyder, UC Biometeorology Specialist, has training units, available in English and Spanish here on his website.
Includes:
Active Frost Protection: Water
Active Frost Protection: Wind Machines
Passive Frost Protection
Methods of Measuring Temperature
Rick Snyder's handouts from his "Frost Protection" presentation as PDF FP_GrapesColor
Links from Rick's website:
When to turn sprinklers on or off for frost protection.
Predicting temperature trends during freeze nights.
A simple method to measure the dew point temperature.
Sprinkler application rates for freeze protection.
Principles of frost protection.
National Weather Service Forecast Office-Sacramento
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