Thursday, May 5, 2011

A Touch Of Frost

Lows in some areas dropped into the mid 30s this morning, allowing for some patchy frost.  Frost occurs even when thermometers read 33-36°.  The reason is that thermometers that take air temperature are placed a few feet above the ground.  On a clear & calm night, cooler air sinks and falls to the ground.  This allows the temperature at grass/plant level to be around 32°, even though your thermometer might read a little higher.

One good thing about very dry air this time of year is that it warms quickly.  Highs will reach the mid 60s today.  A bigger warm-up is slated for next week.

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