Hoar frost

What a gorgeous landscape we had this past weekend!  Trevor and I had to drive down to Wahpeton on Saturday and we just marveled the whole trip at how beautiful everything is when it’s coated with hoar frost.

And people were talking about it everywhere—partly because it was coating everything in sight, and partly because it stuck around for a few days—it seems like usually the sun comes out and melts it after just a few hours.

I also was unaware of exactly what causes it, and was very interested to come across this bit of information from Adnan Akyüz, Assistant Professor of Climatology at NDSU and North Dakota State Climatologist:  “When the atmosphere is saturated with water vapor, available water vapor in the atmosphere will deposit on cold surfaces such as tree branches, car antennas, etc.  If the temperature of these surfaces is at or below the freezing point, water vapor will freeze upon contact with these surfaces to form hoar frost.”

Trevor went out and got some beautiful photos in our yard—the bittersweet was particularly spectacular.

Bittersweet with hoar frost

Closeup of hoar frost

Feather reed grass with hoar frost

Then, on Sunday morning, the sun came out and it all melted away.  But it was cool while it lasted.  :)

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2 Responses to Hoar frost

  1. Pauline Aleshire says:

    It was awesome! I drove out to a friend’s house that morning in awe! It was almost like a black and white painting with a few kinds of vegetation which like your feather reed grass gave it a bit of color….almost like a real soft water color painting! I had forgotten this was called hoar frost. Wonder where that originates? Hope you are doing well!

    • Sandi says:

      I think it’s because “hoar” means gray with old age, and the frost makes things almost look like they have whiskers like an old man. :) Language is so weird, isn’t ?!

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