A cooler air mass will spread into the area Monday behind the front that went through on Sunday. Highs will warm into the upper 70's to the lower 80's on Monday with lows in the upper 50s to lower 60's occurring during the evening hours.
Warmer conditions will then return Tuesday through the rest of the week as highs in the upper 80's to lower 90's occur each afternoon.
The warming trend will linger into Wednesday as highs reach the upper 80's to low 90's and heat index values warm into the low to mid 90s. Not expecting much in the way of rain chances until about the Thursday time frame.
Heading into Thursday, PW (Precipitable Water) values of 1.5 to around 2.0 inches will be possible along and south of the Interstate 44 corridor, with the higher amounts across south central MO. It looks as if models are keeping the track slightly further to the southeast of the area than last nights model runs. Our thunderstorm chances start on Thursday, but will mainly be over the eastern Ozarks initially as energy from around the tropical system moves into Arkansas and south central MO.
On Friday, a southward moving front will push into the area and offer the best chance at showers and thunderstorms, with the tropical low pushing into the boot heel and quickly into the TN valley. Precipitation may shut off pretty quickly on Friday evening in the wake of the low and front.
Models are showing some differences heading into the weekend. GFS wants to keep things dry behind the front, while ECMWF brings another wave of energy and precipitation into the area Saturday night into Sunday. Will keep the low end pops going through the weekend.
Going with cooler than normal temperatures from the weekend into the early part of next week behind the front with a cooler air mass moving into the region.
Precipitable Water - A measure of the depth of liquid water at the surface that would result after precipitating all of the water vapor in a vertical column over a given location, usually extending from the surface to 300 mb. www.taneyservices.com