The National Weather Service forecasts showers and thunderstorms here in Cobb County on Tuesday, June 20, 2023, with a high near 80 degrees.

The National Weather Service has issued a hazardous weather outlook for Cobb County and other parts of the region due to a cool and rainy period settling on the region with a likelihood of thunderstorms.

What does the extended forecast have in store?

This forecast is centered on Dobbins Air Reserve Base in Marietta.

Today

Showers and thunderstorms likely, then showers and possibly a thunderstorm after 4 p.m. Patchy fog before 9 a.m. High near 80. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 80 percent. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight

Showers and possibly a thunderstorm before 8 p.m, then showers and thunderstorms likely, mainly between 8 p.m and 4 a.m. Low around 67. East wind 5 to 10 mph. Chance of precipitation is 80 percent. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday

Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2 p.m. High near 77. East wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 80 percent. New rainfall amounts between three quarters and one inch possible.

Wednesday Night

Showers and possibly a thunderstorm before 8 p.m, then showers and thunderstorms likely between 8 p.m and 11 p.m, then showers likely and possibly a thunderstorm after 11 p.m. Low around 66. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80 percent.

Thursday

Showers and possibly a thunderstorm. High near 78. Southeast wind around 10 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 90 percent.

Thursday Night

Showers and thunderstorms before 11 p.m, then showers likely and possibly a thunderstorm between 11 p.m and 2 a.m, then a chance of showers and thunderstorms after 2 a.m. Low around 66. Chance of precipitation is 80 percent.

Friday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2 p.m. Partly sunny, with a high near 81. Chance of precipitation is 70 percent.

Friday Night

Showers likely and possibly a thunderstorm before 8 p.m, then a chance of showers and thunderstorms between 8 p.m and 2 a.m, then a slight chance of showers after 2 a.m. Partly cloudy, with a low around 67. Chance of precipitation is 60 percent.

Saturday

A slight chance of showers, then a chance of showers and thunderstorms after 2 p.m. Mostly sunny, with a high near 85. Chance of precipitation is 40 percent.

Saturday Night

A 30 percent chance of showers and thunderstorms, mainly before 8 p.m. Mostly clear, with a low around 67.

Sunday

A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.

Sunday Night

A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.

Monday

A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.

What was the climate like in the latest reporting period?

The NWS climate summary for metro Atlanta has now been updated with November figures.

In an article entitled What is the Difference between Climate and Weather?, the National Ocean Service describes the difference as follows:

“Weather is what you see outside on any particular day. So, for example, it may be 75° degrees and sunny or it could be 20° degrees with heavy snow. That’s the weather.

“Climate is the average of that weather. For example, you can expect snow in the Northeast in January or for it to be hot and humid in the Southeast in July. This is climate. The climate record also includes extreme values such as record high temperatures or record amounts of rainfall. If you’ve ever heard your local weather person say “today we hit a record high for this day,” she is talking about climate records.

“So when we are talking about climate change, we are talking about changes in long-term averages of daily weather. In most places, weather can change from minute-to-minute, hour-to-hour, day-to-day, and season-to-season. Climate, however, is the average of weather over time and space.”

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The climate report for the Atlanta area for the previous month shows how much departure from the average temperatures that month represents. The average temperature for a date is the average over a 30-year period.

Date	Max temp	Min Temp	Average	Departure from norm
2023-05-01	68	50	59.0	-8.3	0.00
2023-05-02	73	48	60.5	-7.0	0.00
2023-05-03	72	48	60.0	-7.8	0.00
2023-05-04	75	50	62.5	-5.6	0.00
2023-05-05	64	58	61.0	-7.3	0.01
2023-05-06	76	59	67.5	-1.1	0.00
2023-05-07	83	61	72.0	3.1	0.00
2023-05-08	86	67	76.5	7.3	T
2023-05-09	85	68	76.5	7.1	0.00
2023-05-10	84	67	75.5	5.8	0.00
2023-05-11	81	67	74.0	4.0	T
2023-05-12	79	67	73.0	2.8	0.23
2023-05-13	86	65	75.5	5.0	0.00
2023-05-14	90	70	80.0	9.3	0.00
2023-05-15	85	70	77.5	6.5	0.06
2023-05-16	88	68	78.0	6.7	0.29
2023-05-17	81	66	73.5	2.0	T
2023-05-18	72	64	68.0	-3.8	T
2023-05-19	73	61	67.0	-5.0	0.00
2023-05-20	77	65	71.0	-1.3	0.56
2023-05-21	80	65	72.5	0.0	T
2023-05-22	70	63	66.5	-6.3	0.41
2023-05-23	72	64	68.0	-5.0	0.01
2023-05-24	80	65	72.5	-0.8	0.00
2023-05-25	81	62	71.5	-2.0	0.00
2023-05-26	77	62	69.5	-4.3	0.00
2023-05-27	77	60	68.5	-5.5	0.00
2023-05-28	79	58	68.5	-5.7	0.00
2023-05-29	75	62	68.5	-6.0	0.00
2023-05-30	83	61	72.0	-2.7	0.00
2023-05-31	79	67	73.0	-1.9	0.00
Sum	2431	1928	–	–	1.57
Average	78.4	62.2	70.3	-0.9	–
Normal	81.1	61.3	71.2	–	3.56

Observations for each day cover the 24 hours ending at the time given below (Local Standard Time).

Max Temperature : midnight

Min Temperature : midnight

Precipitation : midnight

Snowfall : midnight

Snow Depth : 7am

Daily Data	Observed	Normal	Record Highest	Record Lowest
Max Temperature	M	85	98 in 1895	59 in 1967
Min Temperature	M	66	75 in 1985	49 in 1972
Avg Temperature	M	75.4	86.0 in 1985	55.0 in 1967
Precipitation	M	0.13	1.55 in 1912	0.00 in 2022
Snowfall	M	0.0	0.0 in 2022	0.0 in 2022
Snow Depth	M	–	0 in 2022	0 in 2022
HDD (base 65)	M	0	10 in 1967	0 in 2022
CDD (base 65)	M	10	21 in 1985	0 in 1997
Month-to-Date Summary	Observed	Normal	Record Highest	Record Lowest
Avg Max Temperature	84.0	84.7	96.5 in 1895	62.5 in 1967
Avg Min Temperature	64.0	65.8	73.5 in 2011	46.5 in 1889
Avg Temperature	74.0	75.3	84.3 in 2011	57.5 in 1967
Total Precipitation	0.00	0.26	2.86 in 2001	0.00 in 2023
Total Snowfall	0.0	0.0	0.0 in 2023	0.0 in 2023
Max Snow Depth	M	–	0 in 2022	0 in 2022
Total HDD (base 65)	0	0	15 in 1967	0 in 2023
Total CDD (base 65)	9	21	39 in 2011	0 in 1972
Year-to-Date Summary	Observed	Normal	Record Highest	Record Lowest
Avg Max Temperature	69.5	67.0	71.1 in 2017	59.8 in 1895
Avg Min Temperature	51.0	47.1	51.6 in 1880	39.6 in 1940
Avg Temperature	60.2	57.0	61.2 in 2017	50.0 in 1940
Total Precipitation	20.93	21.45	39.15 in 1929	10.91 in 1986
Total Snowfall (since July 1)	0.1	2.2	10.9 in 1936	0.0 in 2019
Max Snow Depth (since July 1)	0	–	8 in 1940	0 in 2023
Total HDD (since July 1)	1932	2529	3832 in 1977	1690 in 2017
Total CDD (since Jan 1)	318	318	499 in 2019	111 in 1997
	Period of Record:Max Temperature : 1878-10-04 to 2023-06-01Min Temperature : 1878-10-04 to 2023-06-01Precipitation : 1878-10-01 to 2023-06-01Snowfall : 1928-12-25 to 2023-06-01Snow Depth : 1928-12-25 to 2023-05-30

For much more information on the climate in our area, visit the NWS Climate FAQ for the Atlanta area.

What does the National Weather Service do?

The National Weather Service (NWS) is a part of the National Oceanic and Atmospheric Administration (NOAA).

The NWS describes its role as follows:

“The National Weather Service (NWS) provides weather, water, and climate forecasts and warnings for the United States, its territories, adjacent waters and ocean areas, for the protection of life and property and the enhancement of the national economy. 

“These services include Forecasts and Observations, Warnings, Impact-based Decision Support Services, and Education in an effort to build a Weather-Ready Nation. The ultimate goal is to have a society that is prepared for and responds to weather, water and climate events.”