Friday, July 12, 2013
© Copyright 2013
Gwinnett Daily Post
LAWRENCEVILLE -- On the 12th day of the month, Gwinnett closed in on five inches of rain.
The National Weather Service issued a flash flood warning on Friday evening for parts of Gwinnett including Berkeley Lake, Dacula, Duluth, Lawrenceville, Norcross, Sugar Hill and Suwanee.
There were also reports of hail in Lilburn that followed a severe thunderstorm warning issued before 5 p.m. on Friday. The NWS Doppler radar indicated one to two inches of rain fell from a thunderstorm that passed through during the early evening hours.
The area also included DeKalb County and other parts of north central Georgia.
Measured rainfall in Gwinnett for the month was 4.68 inches as of Friday evening, according to lawrencevilleweather.com.
The NWS alert reported that excessive runoff from heavy rainfall would cause flooding of small creeks and streams, which happened at Sweetwater Creek near Lilburn and other underpasses, drainage areas and low-lying spots. That water depth in some spots may have been too great for a car to pass low spots safely, the alert said.
An alert that was issued after 9 p.m. said Sweetwater Creek crested at 11.4 feet, which is just above the flood stage of 11 feet. The alert said minor flooding would occur in portions of Northwood Country Club and in a four-mile area until the creek merges with the Yellow River.
An advisory that gave a forecast for stronger thunderstorms said gusty winds -- in excess of 60 mph -- and quarter-size hail were mainly expected along a line between Atlanta and Athens.
"With saturated soils, it will not take much wind to blow down trees," the advisory said.
The NWS weekend forecast said there is a 30 percent or 40 percent chance of showers and thunderstorms, mainly after 1 p.m. on Saturday, and after 9 a.m. on Sunday. High temperatures are expected to be in the low 80s, with lows around 70.