MEMPHIS, TN (WMC) - We've endured several days of extreme heat combined with high humidity for several days in the Mid-South, including reaching a high temperature of 100 degrees last Friday, but a break in that pattern is finally in the works.
Despite another warm start to the week, cooler temperatures are in the forecast. We will need to get through one more day of what is expect to be above average temperatures will heat index values between 100 and 105 Tuesday afternoon, then get ready for a change in the pattern.
Last week, the jet stream pushed north into Canada while a upper level ridge of high pressure developed over the nation's midsection. That high pressure system has now moved west, allowing the jet stream to dip slightly south over the eastern half of the U.S.
This slight dip in the jet stream is contributing to a stalled front over the Mid-South. Disturbances will ride along that front for the next several days, increasing rain chances, which in turn will keep temperatures cooler. A few isolated showers or storms are possible Tuesday, but rain chances will increase Wednesday, leading to increased cloud cover and more widely scattered showers and thunderstorm.
A low pressure system will move east out of Texas on Thursday which will bring more rain and thunderstorms to the area. A front will remain stalled over the area through the end of the week and weekend scattered rain and thunderstorms in the Mid-South through at least Saturday. The cloud cover and rain will keep high temperatures in the mid to upper eighties for much of the Mid-South through that time period.
The front will dissipate Sunday, rain chances will decrease, and temperatures will gradually increase, but at this time it doesn't look like temperatures will reach the levels of last week, at least for now. There's still a few weeks of summer left and we can't rule out another stretch of extreme heat before it's over, but for now we can look forward to a little relief and some much need rain.