It has been quite a toasty one out there today thanks to a upper level ridge centered over the Tennessee River Valley, but an active weather pattern and cooler temperatures are on the horizon. High temperatures for today will top out around 94° with a heat index right around the century mark, 100°. Skies will be mostly clear for the rest of the day with the exception of a few scattered clouds. Tonight will be on the warmer side with lows hovering in the lower 70s with mostly clear skies.
Below: 20Z Thu 2018-09-20 HRRR 2m Temp (°F)/ 10m Wind (Kts)
Tomorrow will be very similar to today, except for increasing cloud cover later on in the day thanks to a strong area of low pressure over the northern Great Lakes and eventually moving into the Canadian Province of Ontario tomorrow. The area of low pressure will drive a cold front southeast into the Ohio River Valley. With a lot of moisture and instability in place ahead of the cold front, shower and thunderstorm chances are not out of the question later in the day as the cold front approaches the area. Temperatures tomorrow will top out around 90° with increasing cloud cover and scattered showers and thunderstorms in the late afternoon and evening hours. Scattered showers and thunderstorms will linger into the overnight hours with a low around 67°.
Below: 21Z Fri 2018-09-21 NAM 2m AGL Temperature (°F)
Rain chances stick around for the first half of the weekend on Saturday. A weak shortwave across the southern Great Plains will exit and make its way across southern Kentucky and northern Tennessee. Temperatures on Saturday will be cooler with highs across Warren County topping out in the middle 70s.
Below: 18Z Sat 2018-09-22 NAM Surface Temperature Anomaly (°F)
Tonight: Mostly clear skies, with a low of 71°. Calm winds out of the south.
Friday: Mostly clear skies throughout the morning into the early afternoon with increase in cloud cover with scattered showers in thunderstorms, high of 90°. Winds out of the southwest at 5-10 mph with gusts reaching 20 mph.
Friday night: Showers and thunderstorms are likely with cloudy skies, low of 67°. Calm winds out of the north.
Saturday: Chance of showers and thunderstorm with cloudy skies, high of 75°. Winds out of the northeast at 5-10 mph.