Low this Morning in St. Louis 64-John Fuller’s Forecast for Metro St. Louis-This Afternoon: Variable clouds with more sun northeast and more clouds southwest, Wind WNW-5, Sun Index 8, High 84.  Tonight:  Partly cloudy, Low 65.  Thursday:  Partly sunny, 20% chance for a shower with better chances south,  High 86, Low 64.  Friday:  Partly sunny, 25% chance for a shower or t-shower.  High 87, Low 67.  Saturday:  Fair and warm, High 88, Low 66.