Torrential rainfall may flood areas with poor drainage, such as ditches and underpasses. Avoid these areas and do not cross flooded roads. Water levels of small streams may also rise rapidly. Seek higher ground if threatened by flood waters. Frequent lightning is occurring with this storm. If outdoors, try to get indoors or into a hard topped vehicle. Otherwise, stay away from open areas and isolated high objects such as trees. When indoors, stay away from windows and doors and avoid using wired electronic devices. Do not take a shower or bath. Try to unplug unnecessary appliances before the storm approaches.

At 1102 PM EDT, Doppler radar was tracking a thunderstorm with intense lightning and torrential rainfall over Rock Hill, moving southeast at 25 mph. Locations to be impacted include... Rock Hill, York, Fort Mill, Tega Cay, Newport, Lesslie, Catawba, Lake Wylie, and Clover. Very heavy rainfall rates up to 2 inches per hour will be possible in these areas.