A slow-moving tropical system is pushing flash flood risk into Sandy Springs through Wednesday, July 22, threatening to shut down outdoor dining along Roswell Road and halt construction on the $4.6 billion GA-400 Express Lanes project during peak summer season.
The National Hurricane Center said Sunday, July 19, that Tropical Depression Two formed in the northeastern Gulf and carries an 80% chance of strengthening into Tropical Storm Bertha. The system is expected to move slowly, allowing tropical moisture to linger across the Southeast and increasing the risk of prolonged rainfall through the early part of the week.
The biggest local concern: flash flooding in low-lying and poor-drainage areas, according to the National Weather Service's Peachtree City office, which issued a Hazardous Weather Outlook for Fulton County on Monday, July 20. The NWS warned that thunderstorms associated with the system may produce gusty winds and frequent lightning.
AccuWeather meteorologist Alex Duffus said the flooding risk exists regardless of whether the system reaches named-storm strength.
"Flash flooding from slow-moving or repeated downpours looks to be the biggest threat from the tropical rainstorm, even if it does not fully develop into a tropical depression or storm," Duffus said before the NHC classified the system Sunday.
GA-400 construction corridor exposed
The timing hits the GA-400 Express Lanes project at a vulnerable moment. SR400 Constructors, a joint venture between Ferrovial Dragados and ACCIONA, broke ground on the 16-mile corridor on April 22, with early prep work underway near Exit 12 at McFarland Road. The project employs a peak workforce of more than 500 people, many working outdoors along one of Georgia's busiest highway corridors between Sandy Springs MARTA Station and McFarland.
Heavy rain and lightning would force outdoor construction crews to halt work, including crane operations and earthwork along the corridor. No statement from SR400 Constructors about weather preparations had been issued as of Monday, July 20.
Roswell Road and outdoor dining
Sandy Springs' dense restaurant and retail strip along Roswell Road depends on summer foot traffic and patio seating. If heavy rain falls during lunch and dinner hours Monday through Wednesday, it would cut directly into revenue for restaurants that depend on outdoor capacity during their busiest season.
No cancellation announcements from Sandy Springs city government or individual merchants had been issued as of Monday, July 20.
The Sandy Springs Farmers Market, which operates Saturdays at City Springs, 1 Galambos Way, runs on a "rain or shine" policy. The market's next date, Saturday, July 25, falls outside the Monday-through-Wednesday threat window. Residents and business owners can monitor updated flash flood watches for Fulton County at the NWS Peachtree City forecast office through Wednesday, July 22.
