Significant severe weather event is expected for about 1/2 of the viewing area this afternoon into this evening. Destructive winds of 70+ mph., golf ball to baseball sized hail and a few tornadoes will all be possible with these storms. Although in any one location...storms will last 45 to 60 minutes or so.
ST. LOUIS (KTVI) – The latest weather data continues to point to the potential for some significant severe weather late Saturday afternoon into Saturday night. Warm and humid air is streaming north into the region this evening and that flow will persist through Saturday, creating an extremely unstable atmosphere by Saturday afternoon for areas along and south of I-70.
Much of Saturday will be dry, through at least 3 p.m., so plan outdoor activities accordingly. However, after 3 p.m., storms will blossom rapidly over western Missouri and quickly grow into an expansive complex of fast moving, violent wind producing storms, what we call a “DERECHO.” Winds within this complex could exceed 70 mph and will be capable of extensive wind damage similar to that of a tornado. In addition, some very large hail–golf ball to baseball-sized–will be possible in the strongest cells. And finally, there will also be a risk of a couple of short-lived tornadoes near the leading edge of the fast moving storm complex.