Mother nature is making up for lost time

Mother nature is making up for lost time

Memphis hasn't hit 100° this year but that doesn't mean it's not hot.

MEMPHIS – ( Happy Thursday if no one has said it to you yet! I’m in for Lauren early this morning. I’ve gotta say, for those wondering, it is much harder to go to sleep the night before working this shift. So often people ask, “How do you get up so early?” The real question should be, “How do you go to bed so early?” My answer: It’s tough, either way I’m here and ready to go! Here’s a little temperature food for thought on national eat a peach day; it was 94° on Wednesday. Prior to this week, Memphis international hadn’t hit 90° since August 12th. Here’s another tidbit; Memphis hasn’t hit 100° this summer. Most are saying last week was a nice break with highs barely cracking 80° and manageable humidity. Those days are now over (insert mother nature’s evil laugh here). Highs are back on track with what the almanac calls “average” in the low 90s. The good news, I guess, is that our average high since Tuesday is now dropping; it’s 91°. Humidity is also back to summery levels. Dew points are in the low and middle 70s; whenever it’s above 70° that means it’s humid. Now we’ve talked about heat and humidity, put the two together and we get a heat index around 100° in the heart of the afternoon. How about a few relief storms? There won’t be many but a weak disturbance will try to spark a few thunderstorms mainly south of I-40 today. We’re not looking a severe risk but storms will be slow moving as they put down heavy rain; isolated flash flooding may be a concern. Tomorrow, a front will slide south but weaken as it gets close to us. The impacts will be limited because of that fact. However, scattered storms will be possible north of I-40 on Friday. The front will weaken and essentially wash itself out becoming non-existent by Friday night. That turns off any rain makers and cuts off any cool air source that may have been behind the front for the weekend. Highs Friday through the foreseeable future will stay cranked into the low and middle 90s. The heat index will add insult to injury near 100°. Think of the atmosphere in three dimensions; weather features occur at the surface where we live and thousands of feet up where planes fly. This time around, a ridge of high pressure will take over where the planes fly. Under that ridge air will be sinking, allowing two things to happen to our weather. First, when air sinks it compresses and warms; that cranks the heat. Second, air needs to be able to rise for storms to form; sinking air keeps storm formation at a minimum. Bottom line, the next week will see above average highs with only a couple thunderstorms to cool things off. The late welcome wagon continues for August.

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-Meteorologist Sean Parker

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