The Storm Prediction center new severe weather outlook now has Kansas City in a slight risk for severe weather.

Here is the assessment from the SPC:
...MISSOURI...
   A QUASI-STATIONARY FRONT IS CURRENTLY LOCATED ACROSS SCNTRL MO AND
   SCATTERED THUNDERSTORMS ARE EXPECTED TO INITIATE ALONG AND NORTH OF
   THE BOUNDARY BY LATE THIS AFTERNOON. THE LATEST OBJECTIVE ANALYSIS
   SHOWS MODERATE TO STRONG INSTABILITY IN PLACE WITH MLCAPE VALUES IN
   THE 2000 TO 3000 J/KG RANGE. THIS COMBINED WITH SUBSTANTIAL
   DIRECTIONAL SHEAR IN THE LOWER TO MID-LEVELS SHOULD SUPPORT A THREAT
   FOR ISOLATED SEVERE STORMS. THE SHEAR AND THERMODYNAMIC ENVIRONMENT
   ON FORECAST SOUNDINGS LATE THIS AFTERNOON WILL BE SUFFICIENT FOR
   SUPERCELLS CAPABLE OF PRODUCING LARGE HAIL AND ISOLATED WIND DAMAGE.