Clouds continue to grow vertically and are developing into showers and storms that are tracking very slowly to the south southwest. There isn't any shear (wind speeds increasing with height) in the atmosphere and so activity will be slow moving and tend to pulse in nature. Due to slow movement and high water content in the air, showers and storms will be heavy rainfall producers locally.
Precipitable water values are as high as 1.8" across central Alabama.
Precipitable water is the depth of water in a column of the atmosphere if all the water in that column were precipitated as rain.
Precipitable water tends to spike during the summer and early fall so this is normal for this time of year.
So be careful when traveling today because if you get under one of these showers and storms, visibility will likely drop due to the heavy downpours. Flash flooding is also a possibility. Some of the storms across northern Alabama have produced 2-3 inches of rain already. Remember, if you approach a flooded roadway to turn around and don't drown.
Jill Gilardi Fox 6 Meteorologist