According to the Weather Channel, there are only six known photographs of winter waterspouts in existence. Then, last week, Jordan Detters captured a good minute and a half of video, showing winter waterspouts dancing along the waves of Lake Superior near Knife River, Minnesota.
While water spouts are relatively common in warm months, producing one in the winter requires a pretty specific set of meteorological circumstances, writes Minnesota Public Radio's chief meteorologist Paul Huttner. Thus, the dearth of images. In fact, for one to form at all you need a temperature difference between the water and the air of 19 degrees C.
Winter waterspouts occur when meteorological conditions are just right. You need a bitter arctic air mass passing over relatively warm lake water, and just enough light, low level wind shear to get the rapidly rising air currents spinning nicely.
Saturday’s contrast between bitter arctic air (air temp was about -7 degrees at Two Harbors nearby) and relatively warmer lake water (offshore surface water temps were around 40 degrees) create an “enhanced lapse rate” as temps cooled rapidly with height above the water. That produces rising air, and the lift needed to generate strong updrafts. Slight wind shear gets the air spinning, and small vortexes can form into waterspouts over the lake.
On Monday, we reported that for the first time, a plant seed had germinated on the moon, an early experiment to test whether food could someday be grown on the moon to feed residents of a lunar base. The cotton sprout was inside a canister on China’s Chang’e 4 lander that touched down on the […]
Starting Sunday evening, Jan. 20, 2019, North and South America will have a chance at seeing 2019’s only total lunar eclipse, from start to finish. Our Earth, Moon and Sun line up on Sunday night for the only total lunar eclipse of of the year. Catch it if you can.
Adam Savage is back with an all-new show, and he’ll be tweeting live during tonight’s MythBusters Jr. on The Science Channel. The episode is named “Battery Blast,” so we’re expecting there will be explodey explosions, and they’re mentioning “straight as an arrow” so, pointy weapons.
Still determined to keep those New Year’s health resolutions? If you’re going to stick with the exercise plan, it’s enough of a challenge to budget your time. No need for your financial budget to take a hit, too. Here’s a more convenient – and cheaper – alternative to a gym membership or Peloton bike: Two […]
Want a career in web design? It’s true that these days, most anyone can throw up a page or two. But for true workhorse web design, you’ll sometimes need to match the platform to the project. Enter the Complete Front-End Developer Bundle, an educational grand tour around the best tools for the web. For beginners, […]
Things move fast in the world of social media, and they don’t slow down for marketers looking to make an impact. Whether you’re grabbing eyeballs for a major company or a local business, you’ll need to adjust your strategy for every platform. Don’t have a strategy to begin with? That’s where the Social Media Marketing […]