Saturday's forecast is really the one to keep an eye on. With a shortwave trough deepening over the northern Plains, it will force a front through the midwest. With a warm and moist airmass in place, the interaction with this front will bring chances for showers and thunderstorms. There may be an isolated shower or thunderstorm pop up before 6PM, but there is a greater chance after that. The latest NAM 4k model run shows a line of thunderstorms moving through the area at approximately 9-10PM timeframe, but staying just a few miles to the east of the track. Since this run is so close to the track, I'm going to include a chance of thunderstorms for Saturday evening.
So, Saturday will be mostly sunny during the day and hot with a slight chance for an isolated thunderstorm before 7PM. Daytime highs will be at or near 90. Chance of rain is only 20%. Winds will be out of the southwest at 5-10 MPH. Skies will become mostly cloudy during the evening with a chance of showers and thunderstorms. Temperature at 7PM will be in the middle 80s. Chance of rain is 50%. Winds will be out of the southwest at 5-10 MPH.
Stay weather aware, and keep a handy source of weather information close by. Make a bookmark to our live radar located on our website at www.racecastweather.com. Also, I'll have frequent updates on Twitter (@RaceWx4You) if thunderstorms threaten the area on Saturday.