Thunderstorm activity will calm down a bit over the next couple of days as the post-cold front flow becomes more stable. We could still see a few scattered afternoon thunderstorms Thursday and Friday, but they should be few and far between. Temperatures will cool to the low to mid-80s, before warming back to the upper 80s and low 90s over the weekend. At this point the weekend looks to be pretty dry with only a few clouds here and there.

雷

I’ve talked a lot about lightning and , and have given a quick and over-simplified explanation of how lightning occurs. Negative charges from the base of thunderstorms clouds induce a positive charge on the ground, and after a “stepped leader” forms out of the clouds, it causes a “return stroke” from the ground once the negatively charged leader gets close enough to the positive charges on the ground. This generally referred to as “negative” lightning, and is the most common kind. But it doesn’t always work that way… lightning can be positive as well.

Tomorrow I’ll tell you how nature sometimes turns the tables on lightning’s polarity.

 

 

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