After a gust of thunderstorm on Saturday afternoon, Boise residents were treated to a rare exhibit: an excessive double rainbow.
The Saturday storm approached Boise from the northwest just before 3 pm. According to radar posted on the National Meteorological Service’s Boise Twitter account..By 3:22 pm Boise Airport recorded a gust of 62 mph According to the NWS, there is a temperature drop of 13 degrees in 15 minutes.
In the hills, a gust of 68 mph was recorded.
At around 7:30 pm, the weather was fine and it rained while the sun was shining.
Stephanie Henry, a meteorologist at Boise’s National Weather Service, said: The cloudless sunsets often seen during many storms hit the rain directly.
During a standard rainbow, light is refracted and reflected through water droplets in the air. According to National Geographic.. According to Henry, the visible colors of the electromagnetic spectrum are of different wavelengths, and refraction or bending through water separates the light into different colors. Slightly different sizes of water droplets can change the way colors are projected.
Saturday’s rainbow was overkill. That is, the viewer could see not only the entire spectrum of visible light, but also the repetition of other colors under the rainbow.Excessive effects occur when rays compete Interfere with each other during reflection, According to experts. According to Henry, this phenomenon is common, but often too dark to see.
“In the case of an excess of rainbows, it basically meant that the rainbow itself had a repetitive effect,” Henry said. “Water acts as a prism and reflects enough light to make all the colors in the spectrum visible. If it’s strong enough, you can see more and more columns of colors.”
Moreover, the angle of the sun reflected the light twice, revealing a second rainbow above the sky.
The rainbow has received a lot of attention on social media. There, a colorful display welcomed Boise residents who were adventuring after heavy rain.
A Twitter user captured a video of a colorful bow.
“It was a lot of things in the right place and at the right time,” Henry said.