An outflow boundary left behind by early morning storms in Oklahoma is expected to serve as a focal point for scattered thunderstorm development later today. Forecasters anticipate that a few of these storms may become strong to marginally severe, with the potential for hail, gusty winds, and frequent lightning. The most likely window for storm activity is between 3 PM and 11 PM.

Across the central and southern Plains, unsettled weather is forecast to persist through early next week. Isolated to scattered thunderstorms are expected daily, with the highest coverage anticipated from Tuesday night into Wednesday as a cold front moves through the region. Rain chances are expected to taper off during the latter half of the week, with temperatures behind the front settling into the 80s.

In Texas, particularly the Austin and San Antonio areas, highs today are forecast to reach the upper 80s to mid 90s under mostly sunny to partly cloudy skies. While most areas will remain dry, isolated showers or thunderstorms may develop over the coastal plains this afternoon and evening and could approach the I-35 corridor.

Hot conditions will continue into early next week, with heat index values projected to exceed 100 degrees across much of the region by Tuesday. Rain chances remain minimal through early Tuesday but will increase later in the day as the cold front approaches. The front is expected to arrive by early Wednesday, bringing near-normal temperatures for the remainder of the workweek. Rain chances will diminish but linger into Thursday.

According to KNCT Meteorologist Bill Hecke, Sunday morning begins with mostly clear skies and temperatures ranging from the low 60s to upper 70s, accompanied by a light southerly breeze. Sunshine will dominate throughout the day, with highs climbing into the low to mid 90s. A slight chance of isolated showers exists late in the day, primarily to the north and northeast. Monday is expected to be slightly warmer with continued sunshine and highs in the 90s.

Nationally, the Weather Prediction Center highlights a continued threat for flash flooding and severe weather across the Midwest, Mississippi Valley, and central/southern Plains. A slow-moving upper trough and associated surface boundaries will contribute to repeated rounds of showers and thunderstorms, fueled by Gulf moisture. The greatest risk for heavy rainfall and flash flooding on Sunday is centered around the Missouri-Kansas-Arkansas-Oklahoma border region, with additional threats extending into the Ozarks and Mid-South through Tuesday.

Elsewhere, daily thunderstorms are expected across central and southern Florida and along the western Gulf Coast. Monsoonal moisture returning to the Desert Southwest will increase storm chances Sunday and Monday, with isolated flash flooding possible in areas such as the Colorado River Valley and central Arizona.

As summer draws to a close, above-average temperatures are forecast across much of the central and eastern U.S., while the West will experience near to below-average conditions. Highs in the Southeast and southern Plains will range from the upper 80s to mid-90s, while the Midwest and northern Plains will see temperatures in the 70s and 80s. Cooler conditions will persist in the Northeast and Pacific Northwest, with a warming trend expected early in the week.

Keep it tuned to KNCT for hourly weather updates and visit myknct.com anytime for forecasts on-demand.