WHY? When forecasting severe storms, we look for many atmospheric ingredients. However, there're 4 main ones that stick out. They go by the acronym, S.L.I.M. Shear, Lift, Instability, & Moisture. By winter severe storm standards, it looks like we will have enough of each ingredient to bring the potential of storms Wednesday evening. We will have plenty of atmospheric shear, or rotation. There are strong southerly winds at the surface and stronger southwest winds around 1 mile up in the atmosphere which promote rotation in these storms. A cold front and resulting storms ahead of the front, moving through will provide the source of lift that we need to form storms. The two ingredients that will be in question are instability or “storm fuel” and moisture. Earlier model runs had a lack of both variables, but the latest High-Resolution model data has shown and increase in these ingredients which would bode well for storm development. Current model runs show that should also have plenty of low-level moisture with forecasted dew points expected to be into the mid-60s across much of Valley.
"severe" - Google News
February 05, 2020 at 04:33AM
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Wednesday is a First Alert Weather Day for severe storm potential - WAFF
"severe" - Google News
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