The National Weather Service (NWS) has issued an updated forecast for Cobb County, with expectations of mostly sunny skies on Monday, July 21, 2025, and temperatures peaking at around 92 degrees.
However, residents should be aware of a hazardous weather outlook affecting Cobb County and surrounding regions, as isolated to scattered thunderstorms are anticipated in the afternoon and evening.
According to the NWS, some of these storms may be accompanied by strong winds, heavy rainfall, and frequent lightning.
In addition to the storms, heat indices are projected to reach between 100 and 108 degrees in central and eastern Georgia.
As a result, a Heat Advisory is currently in effect for areas where widespread heat indices are expected to hit or exceed 105 degrees.
The NWS urges residents to take precautions to avoid heat-related illnesses during this period.
For those interested in weather terminology, resources are available for interpreting weather news reports, defining typical terms, and providing a better understanding of forecasts.
The extended weather forecast for Cobb County, particularly near Dobbins Air Reserve Base in Marietta, includes a barrage of weather phenomena throughout the week.
Today, there is a 40 percent chance of showers and thunderstorms, primarily occurring between 2 p.m. and 5 p.m.
Patchy fog is expected early in the morning, between 7 a.m. and 8 a.m., but the day will generally be mostly sunny, with a high near 92 degrees.
The heat index values could feel as high as 98 degrees, accompanied by a northwestern wind blowing at 5 to 10 mph, with gusts reaching up to 15 mph.
As night falls, there’s a 10 percent chance of showers and thunderstorms before 8 p.m. The night is expected to be partly cloudy, with temperatures dropping to around 73 degrees.
A west wind will continue to blow at 5 to 10 mph, with similar gusts.
Moving into Tuesday, the forecast predicts a 50 percent chance of showers and thunderstorms after 2 p.m, while the day remains mostly sunny, with a high near 94 degrees.
Heat index values could escalate to around 101 degrees, and a gentle northwest wind near 5 mph is anticipated.
For Tuesday night, there will be a chance of both showers and thunderstorms before 11 p.m.
The temperature is expected to settle around 72 degrees as the sky becomes mostly cloudy. The north wind will shift to the east after midnight, with a 30 percent chance of precipitation.
Wednesday’s forecast indicates a 30 percent chance of showers and thunderstorms post-2 p.m., with conditions remaining mostly sunny and a high near 91 degrees.
An east wind of around 10 mph, along with gusts of 15 mph, is expected throughout the day.
As night approaches, there’s again a 30 percent chance of showers and thunderstorms before 8 p.m., with temperatures cooling to approximately 73 degrees under mostly clear skies.
On Thursday, the chance of showers and thunderstorms increases to 40 percent after 2 p.m. The temperature is predicted to reach a high of around 90 degrees while remaining mostly sunny throughout the day.
The chance of precipitation remains consistent in the evening, with a 30 percent likelihood of showers and thunderstorms mainly before 8 p.m., and temperatures dropping to about 73 degrees overnight.
Entering Friday, there exists a slight chance of showers and thunderstorms between 8 a.m. and 2 p.m., switching to an increased likelihood of showers and possible thunderstorms thereafter.
The day will be predominantly sunny, with high temperatures nearing 91 degrees and a 60 percent chance of precipitation.
As the weekend approaches, Friday night will see showers likely and possibly a thunderstorm before 8 p.m., with a slight chance of lingering showers and thunderstorms until about 2 a.m. The low will remain around 73 degrees under partly cloudy skies.
Saturday will bring a 40 percent chance of showers and thunderstorms, with the weather forecast projecting a high near 93 degrees.
Saturday night will continue with a 30 percent chance of thunderstorms, while temperatures will again settle at approximately 74 degrees.
Sunday is expected to have a 50 percent chance of showers and thunderstorms, along with mostly sunny conditions and a high around 93 degrees.
In terms of climate, the latest reporting period has provided updated figures for the Atlanta area from the NWS, reflecting trends and average temperatures from June 2025.
The National Ocean Service clarifies the difference between weather and climate, stating that weather refers to conditions on any given day, while climate represents long-term averages across time.
For more information on local climate trends and summaries, residents can visit the NWS Climate FAQ specific to the Atlanta area.
As a part of the National Oceanic and Atmospheric Administration (NOAA), the National Weather Service seeks to provide essential weather, water, and climate forecasts and warnings to protect lives and property as well as enhance the national economy.
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