(WOWK) – When temperatures reach the mid 30s down to just above the freezing mark, the National Weather Service will issue a Frost Advisory so people will know they may need to take care of plants they don’t want to suffer from the cold. What’s important to note here is that frost is a form of freezing water vapor. The catch is, the air temperature may be well above freezing above the ground, but the grass blades or leaf surfaces or tree branches may continue to radiate heat out and the surface temperature can drop to the freezing mark. Here are ways to protect plants from the University of California Division of Agriculture and Natural Resources: Any time there is a frost advisory or hard freeze warning for our area you will see those listed here with county by county info from StormTracker 13. Copyright 2019 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed. (WOWK) – Winter can be a harsh season, requiring extra safety supplies or even just supplies for comfort when winter storms hit. The National Weather Service provides us with this information regarding supplies you should keep on hand during th...