Day 3 of the Week, Day 3 of Severe Weather
August 5th 2020
There is a possibility for severe weather again for the southeastern part of Wyoming and the Nebraksa Panhandle. The Storm Prediction Center (SPC) has issued a Slight (Level 2) risk for severe weather for Southeast Wyoming including Cheyenne and Pine Bluffs as well as Sidney and Kimball in Nebraska. We had one of these yesterday for the same areas, but luckily it didn’t really pan out, as only northeast Colorado and a few parts of the Panhandle saw some severe storms. There are a few differences with today’s threat compared to yesterday, assuming it does pan out.
The primary difference between today and yesterday is the amount of CAPE (Convective Available Potential Energy), or storm energy. There were bountiful amounts of it yesterday, which would have promoted intense storms and likely some large hail along with strong wind gusts. Those risks are still at play today, but the hail risk is going to be lower thanks to lower amounts of CAPE today. The other main difference is wind shear, or the change in wind direction and speed with height in the atmosphere. There was very little wind shear yesterday at all, however today there is more shear present especially when it comes to wind direction. This will slightly raise the threat for a spin-up tornado. That being said, the surface wind speeds are overall in the single digits and low double digits, and for a decent tornado threat, these would need to be a bit stronger. The same goes for the mid level wind speeds; they are not very strong for that level of the atmosphere when compared to winds aloft that would typically allow for a higher tornado threat. However, the threat is high enough to warrant a level 2 risk for severe weather.
As for the rest of the week, the SPC has already gone ahead and issued a Marginal (Level 1) risk for tomorrow, once again including Southeast Wyoming and the Nebraska Panhandle, however the threat overall will be lower, especially for Wyoming. Once Friday arrives, summer heat and sunshine will carry the Cowboy State through the weekend and into next week as temperatures climb into the 90s for most of the state.
CHEYENNE, Wyo. (Wyoming News Now) -
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