The Last Frost?

It was a frosty start to the week and meteorologist Josh Fitzpatrick let's you know if it'll be the last of the season!

We usually tell you to hold off on planting those tender plants until after Mother's Day.  That's because we usually have a killing freeze or frost all the way up until that time.  This was certainly this case this year.  Most areas had frost the morning after Mother's Day! 

The map below shows the average last freezing temperature dates across the United States.  On average in our area once we get past May 15th we won't have a frost or freeze.

I remember when I was a first year meteorology intern in 2002 our area had a frost all the way up until June 1st! 

A lot of the River Cities are protected from hard freezes and killing frosts by the rivers.  If you live next to a river or large creek, often times you get fog to form rather than frost in spring.  When fog forms, it helps to raise the temperature of the air by a couple of degrees.  Fog formation releases what we call latent heat.

After we received that frost this past Monday morning, a lot of folks e-mailed me asking "was that our last frost of the season?"

Mother's Day 2010 was a little earlier than normal.  But my official prediction is we WILL NOT have another frost in the Ohio, Big Sandy or Kanawha Valleys again until at least October. 

Happy planting!

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