The Blizzard Brought Donuts!

Jan 29, 2016
Snow Roller
NOAA

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Imagine walking out on a cold winter morning and finding the landscape covered with icy snowballs, donuts and jelly rolls.

That’s what happened after the late January blizzard. From Illinois to Pennsylvania, people discovered a playground of snow rollers, rare snow formations normally only found at the South Pole!

Have a donut, complements of the latest blizzard! SOURCE: NOAA

The blizzard brought record-breaking cold – temperatures not seen in a generation. With it, it brought the recipe for snow donuts:

1.     Powder snow – Cold air holds very little moisture, so any snow that falls feels as dry and light as frozen talcum powder. It is normally found in Antarctic or high in the Rocky Mountains. Midwestern and Eastern states, used to heavier, wetter snows, prone to turn to slush and ice, found themselves covered with delicate powder snow.

Snow rollers – just add powder snow and high winds. SOURCE: NOAA photo by Jolene Albert

2.    Wind packed crusts – Normally, the top layer of snow forms a crust from melting slightly, then refreezing to an icy layer. During the late January blizzard, however, temperatures were too cold to allow any melting. Instead, the high winds packed the powdery snow denser and denser until it formed a thin, light crust.

3.    High, rolling winds – As the high winds continued, they caught occasional broken edges of the snow crust. Swooping under, they lifted the layer. It began to roll. Soon it formed a donut or, if large enough, a jellyroll. If the winds continued to roll it, it would pack into a snowball, or a densely layered log.

High winds catch the frozen crusts of snow and roll them like snowballs. SOURCE: NOAA

Although the late January blizzard was technically not a “Polar Vortex” storm, it brought rare snow formations normally only seen in Antarctica. What’s next this winter? Penguins?

About This Blog

Are you a weather watcher? Welcome to "Weather Whispers" by James Garriss and until recently, Evelyn Browning Garriss. With expertise and humor, this column covers everything weather—from weather forecasts to WHY extreme weather happens to ways that weather affects your life from farming to your grocery bill. Enjoy weather facts, folklore, and fun!

With heavy hearts, we share the news that historical climatologist and immensely entertaining Almanac contributor Evelyn Browning Garriss passed away in late June 2017. Evelyn shared her lifetime of weather knowledge with Almanac editors and readers, explaining weather phenomena in conversation and expounding on topics in articles for the print edition of The Old Farmer’s Almanac as well as in these blog posts. We were honored to know and work with her as her time allowed, which is to say when she was not giving lectures to, writing articles for, and consulting with scientists, academia, investors, and government agencies around the world. She will be greatly missed by the Almanac staff and readers.

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