Tornado Watch for several Indiana counties until 2 a.m.

GALLERY: Unique cloud formations appear in Indiana sky this morning

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4 Fast Facts:

  1. The clouds are called Undulatus asperatus, which is Latin for “roughed waves”
  2. They are commonly known as wave clouds
  3. The cloud formation was proposed to be a separate cloud type in 2009
  4. They are dark and eerie in appearance, but they usually dissipate before a storm forms

Did you notice unusual clouds in the sky this morning?

We received several photos from viewers who asked us about the cloud formations.

The clouds are called asperitas clouds, formerly called Undulatus asperatus, a Latin name that translates to mean “agitated (or roughed) waves.” The clouds are commonly referred to as the wave clouds.

According to meteorologist Danielle Dozier, they were proposed to be a separate cloud type by the Cloud Appreciation Society in 2009.

“They appear dark and eerie and are usually seen in the morning or midday hours following thunderstorms,” said Dozier. “They are called wave clouds because of their wavy appearance.”

The clouds typically appear dark and tend to dissipate without a storm forming.

Although they can appear in Indiana, they usually form in the Plains States.

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