These storms will produce pea-sized hail. Very heavy rain will fall from these storms... and will cause water to pond on roads and quickly fill roadside ditches and small streams.
Excessive runoff from heavy rainfall will cause elevated levels on small creeks and streams... and ponding of water in urban areas... highways... streets and underpasses as well as other poor drainage areas and low lying spots.
In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain. Do not attempt to travel across flooded roads. Find alternate routes. It takes only a few inches of swiftly flowing water to carry vehicles away.
Do not drive your vehicle into areas where the water covers the roadway. The water depth may be too great to allow your car to cross safely. Move to higher ground.
Please report significant weather to the National Weather Service by calling toll free... 877-633-6772... when you can do so safely.