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♠ Snow Rollers ♠

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Yesterday morning I woke up to these in my back yard ... These are some of the biggest but there are several small ones..

A snow roller is a rare meteorological phenomenon in which large snowballs are formed naturally as chunks of snow are blown along the ground by wind, picking up material along the way, in much the same way that the large snowballs used in snowmen are made.
Unlike snowballs made by people, snow rollers are typically cylindrical in shape, and are often hollow since the inner layers, which are the first layers to form, are weak and thin compared to the outer layers and can easily be blown away, leaving what looks like a doughnut or Swiss roll.[1] Snow rollers have been seen to grow as large as two feet in diameter.
The following conditions are needed for snow rollers to form:
• The ground must be covered by a layer of ice to which snow will not stick.
• The layer of ice must be covered by wet, loose snow with a temperature near the melting point of ice.
• The wind must be strong enough to move the snow rollers, but not strong enough to blow them apart.
• Alternatively, gravity can move the snow rollers as when a snowball, such as those that will fall from a tree or cliff, lands on steep hill and begins to roll down the hill.
Because of this last condition, snow rollers are more common in hilly areas. However, the precise nature of the conditions required makes them a very rare phenomenon.

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pkin38

Thanks Shirley .... I thought it was interesting too...

Shian2

I admit to not knowing much about snow, but I found this very interesting Pat, Thank you.

pkin38

Thanks everyone for stopping in... It was different ... Tried to get a better picture but would have had to walk out in the yard .. It is just to cold for that.

pumpkinhead

Something new I have learned today! Thanks, pkin.

SunnyBarb25

Congrats Pat for being chosen to have this phenomenon.... And thank you for sharing it with us!

goingsilver

Amazing, that's a new one on me!

gemstone

I've heard of the rocks that move across the desert but never these...jigidi U. once again adds to our general...and weird...knowledge! ;)))

buckeye425

These are so cool Pat! I saw several pictures of them on both channel 4 and 10 yesterday and wondered if you had any down your way. It gives us something to appreciate during this cold and snowy winter! :>)

puzzeljac

Wow Pat that completely new for me. I think it looks very funny. Didn't you think at first, who was in my garden? Thanks for showing and the info. I like it.

pkin38

Never either until yesterday... Thanks Fran...

bookish

Cool ! Don't think I've ever seen them.

pkin38

Oh Beekay ... they were in the construction area along the interstate by-pass and they were bigger but there was no way I could take a picture ....

Beekay

I've seen them a few times. Usually only up to 2 ft. in diameter. But I once saw them on a lake area and they were doughnut shaped with a hole in the middle and were up to 4 1/2 ft tall. Sure wish I'd had a camera that day!

pkin38

Thanks PutterDutt ... I have never heard of them let alone seen them until yesterday morning... Yep ONLY me get them...

Thanks Lucy .... When I went to the doctor yesterday I only seen a few and they were very far between.... It was wierd..

pmccall

Thanks for your information but I'm still tired of this snow....hahaha tfp

grandmalucy

Good morning Pat, i only just heard about these last night on a tv news station. you are previliged,,, because it only happens with special conditions...

PutterDutt

I don't think I've ever seen these before. We've got the cold (17 below zero F w/35 below wind chills at the moment) and we have snow and wind, but only YOU get the neat effects, pkin!

pkin38

Thanks Ardy .... Someone thinks I'm special .... I was the only one in my little area that had them ... On the way home from the doctors office I saw very few in some farm fields.

ringleader

Wow. You can track their path too. I would think you also need a fairly open area like you have. Thanks for sharing this rare sight. See how special you are. You were the only one who had them. Hugs.

pkin38

Thanks Jim ... My yard was the only one that had them .... Which I thought was really something else ...

jcarroll

An incredible sight to see! Thanks, Pat!