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We will continue with the dry and sunny weather over the next week, with the temperatures starting at about 80 degrees on Monday, and then rising steadily with near record high temperatures in the low 90s expected by the middle to latter part of the week. Once we get past next week there is some indication that the strong ridge of high pressure will start to breakdown and we could see some cooler, and possible even wetter weather coming our way.

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Even though the air temperature hasn’t hit the freezing mark down here in the valley, that doesn’t mean the ground has escaped the frost line. I received a report from a viewer down in the Gardnerville area last week saying that she had a frost (at the expense of her veggie garden) early last week. How can that happen with temps in the 40s?

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It happens more than you might think. During the day, the sun heats up the ground directly (by radiation) to a level much warmer than the air above it. Walk barefoot on asphalt on a sunny day if you don’t believe me. The reverse happens at night. The ground emits radiation energy straight to outer space, leaving the atmosphere mostly untouched. So the ground cools much faster than the air.

 

 

 

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