Spring rains and thunder

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Main threats

No widespread hazardous weather is expected for the next 7 days.

Summary

We’re seeing some sprinkles and light showers across the plateau this morning, and those will gradually increase in coverage and intensity as we go through the day. The greatest chance for rain should come this afternoon and evening, continuing into the overnight hours. T-storms are also likely but they should stay below severe limits. The Storm Prediction Center has all of Middle TN and most of the plateau in the marginal risk for severe weather for this evening and tonight, which means we can’t completely rule out an isolated strong storm or two. The marginal risk category is the lowest of the five severe weather risk categories.

Showers will be with us through Friday, but they should be on the light side and very scattered/isolated.

Rain chances pick back up for the weekend, with t-storms once again likely by Saturday afternoon/evening and Sunday. Again, these storms should stay below severe limits. The SPC has placed most of the plateau in the marginal risk once again for Saturday, so a strong storm or two can’t be ruled out (esp south of I-40).  I don’t recommend any outdoor plans for the weekend unless you’re a duck (ha).

The weather improves for the start of our work week, though it may be on the cool side (Dogwood Winter?).

WeatherTAP WeatherFACT

During daylight hours, the sky may turn green before a tornado. This is not always the case, but a greenish hue is often observed in tornado-producing storms. The cause isn’t exactly known, though it is widely believed that it is caused by the dispersion of sunlight through storm clouds containing lots of water droplets and ice.

Records

A late season snowstorm on this day in 1977 produced catastrophic tree and power line damage across portions of Pennsylvania, New York state and southern/central New England. It was the first May snow in Boston in 107 years. The heavy, wet snow accumulated to as mush as 27 inches.

Almanac

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Yesterday’s record high: 85 (1993)

Yesterday’s record low: 33 (1960)

Today’s record high: 85 (1986)

Today’s record low: 31 (1960)

Today’s sunset: 7:34

Tomorrow sunrise: 5:37

Today’s day length: 13 hrs 55 mins 29 secs

Tomorrow’s day length: 13 hrs 57 mins 13 secs

One year ago today

The morning low was 52 and and the afternoon high was 77 degrees. Only a trace of precip was measured.

Astronomy 

Sky viewing conditions tonight: POOR

Moon rise: 9:37 a.m.

Moon set: midnight

Moon phase: Waxing Crescent, 23% illumination

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What to look for in the night sky tonight

Clouds will obscure the view.

News

Some of you may have noticed that the lightning bugs have made their appearance on the plateau. I noticed my first one last night and then they really started appearing as the evening wore on. Fireflies produce a unique reaction within their bodies that leads to a light being produced. The light produces no heat.

According to Scientific American, the light can only be produced when oxygen is brought into the body. Therefore, the firefly controls how long the flash lasts by “inhaling”. I put inhaling in quotation marks because bugs have no lungs. They take in oxygen through a complex series of tubes called tracheoles. The part of the body that lights up is extremely distasteful to predators, making fireflies a very undesirable snack.

So look for the lightning bugs the next chance you get!

firefly.jpg.860x0_q70_crop-scale

You all have a great day!

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