National Weather Service United States Department of Commerce

Repeated rounds of thunderstorms with heavy rainfall, especially over far southwest Missouri and far southeast Kansas, will generally produce 2-3 inches of rain, with locally higher amounts of 5-7+ inches possible. Where higher amounts fall, life threatening flash flooding can be expected.
Thunderstorms are possible tonight (Monday night) over western Missouri and southeast Kansas. There is a Slight (2 of 5) Risk that a few storms may become severe. Severe weather chances and threats will depend on the evolution of a cluster of thunderstorms that will develop today over Colorado.
Heat and humidity will build into the area this week as heat index values climb into the upper 90s and 100s. Furthermore, warm overnight temperatures in the 70s will provide little relief from the sustained hot and humid conditions. Take heat-related precautions if without cooling and/or hydration!