ATLANTA -- The northwest Georgia tornado watch has been expanded to include all of metro Atlanta, and is now valid through 10 p.m. A new line of supercell thunderstorms is developing and moving toward north Georgia in conjunction with a large storm system that has been crossing the Southeast on Wednesday.

Click here for the latest list of watches and warnings in effect. Download the FREE 11Alive News app now in the iTunes store or on Google Play to receive alerts when new warnings are issued.

The latest updates:

11:06 P.M. -- A thunderstorm warning is also in effect for Banks, central Barrow, northern Clarke, southeastern Hall, Jackson, northern Oglethorpe and Madison Counties in northeastern Georgia until 11:45 p.m.

10:53 P.M. -- A severe Thunderstorm warning has been issued for southeastern Meriwether County, northwestern Marion County, Muscogee County, Talbot County and Harris County. The warning is in effect until 11:45 p.m. 

10:40 P.M. -- The National Weather Service issued a Thunderstorm Warning for Meriwether County, Troup County and parts of Harris County lasting until 11:30 p.m. 

10:14 P.M. -- A severe Thunderstorm Warning has been issued for northwestern Fayette County, southeastern Carroll County, southern Douglas County, northern Coweta County and southwestern Fulton County. The warning expires at 11 p.m.

9:57 P.M. -- A severe Thunderstorm Warning is in effect for southern Heard County, northern Troup County and southwestern Coweta County until 10:45 p.m.

The tornado watch also has also extended and remains in effect until 11 p.m. for west central Georgia.

9:20 P.M. -- A Flash Flood Warning is in effect in Forsyth and Fulton counties until 8 a.m. Thursday.  The NWS said, "At 8 feet...Minor flooding continues to expand further into the woodlands and fields along the creek from near Cumming in southForsyth County to Alpharetta and Roswell in north Fulton County. Additional portions of The Big Creek Greenway have minor flooding with 1 to 2 feet of water. Most of the walking and biking pathswill be closed...especially upstream and downstream from the gage on Kimball Bridge Road and near Rock Mill Park. Portions of the YMCA Campground off Preston Ridge Road will flood."

Another Flash Flood Warning is in effect in DeKalb, Fulton and Gwinnett counties until 3 a.m. The NWS said, "At 907 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Rainfall amounts of 3 to 4 inches have already fallen over the warned area today, and an additional 1 to 2 inches are possible in the next several hours. Creeks and rivers are already swollen, and additional rises are expected. Flash flooding is expected to begin shortly."

8:15/7:15 CST P.M. -- A TORNADO WARNING has been issued for Cleburne County, Ala., just across the border of Georgia. It remains in effect until 8:45/7:45 CST.

A SEVERE THUNDERSTORM WARNING is in effect in Floyd, Haralson, Paulding and Polk counties until 8:45PM. 

7:46 P.M. -- Some counties have been dropped from a Tornado Watch, but it still includes most of the metro Atlanta area. The following counties are under the watch until 10 p.m.: Bartow, Carroll, Catoosa, Chattooga, Cherokee, Clayton, Cobb, Coweta, Dade, Dawson, DeKalb, Douglas, Fannin, Fayette, Floyd, Forsyth, Fulton, Gilmer, Gordon, Gwinnett, Haralson, Heard, Henry, Murray, Newton, Paulding, Pickens, Polk, Rockdale, Walker, Walton, Whitfield

7:12 P.M. -- A SEVERE THUNDERSTORM WARNING for Meriwether, Heard, Troup and Coweta counties until 8 pm. 60 mph wind gusts and penny-sized hail are possible with this storm.

7:07 P.M. -- FLOOD WARNING for Nancy Creek at West Wesley Road in Atlanta until further notice. At 7 pm, the stage was 12.3 feet and rising. Flood stage is 12 feet. 

7:03 P.M. -- A SEVERE THUNDERSTORM WARNING has been issued for Randolph County, Ala. until 6:30 p.m. CT (7:30 pm ET). 60 mph wind gusts and quarter-sized hail are possible with this storm.

6:35 P.M. -- FLOOD WARNING  for Morning Creek in north Fayetteville affecting Fayette and Fulton counties has been issued until further notice. At 6 pm, the stage was 13.9 feet and rising. Flood stage is 14 feet. Morning Creek will rise above flood stage early Wednesday evening. 

5:26 P.M. -- FLOOD WARNING for Sweetwater Creek near Lilburn until midnight. Minor flooding is forecast.

5:25 P.M. -- FLOOD WARNING for Alcovy River near Lawrenceville until midnight. At 4 pm, the stage was 9.8 feet and rising. The river will continue rising to near 10.4 feet by Wednesday evening. The river will fall below flood stage late tonight.

5:25 P.M. -- FLOOD WARNING for Big Creek near Cumming until Thursday morning. At 4 pm, Wednesday, the stage was 5.9 feet and rising. Flood stage is 6 feet. The river will fall below flood stage by Thursday morning.

5:00 P.M. -- A TORNADO WATCH has been expanded to include most of the rest of metro Atlanta and is valid through 10 p.m. Primary threats include intense tornadoes, widespread large hail events, widespread damaging wind gusts to 70 mph and damaging winds. 

The expanded tornado watch includes Bartow, Carroll, Cherokee, Clayton, Cobb, Coweta, Dawson, DeKalb, Douglas, Fannin, Fayette, Floyd, Forsyth, Fulton, Gilmer, Gordon, Gwinnett, Haralson, Heard, Henry, Murray, Newton, Paulding, Pickens, Polk, Rockdale, Walton and Whitfield counties in Georgia, and it does include the city of Atlanta.

4:48 PM -- SEVERE THUNDERSTORM WARNING for Cleburne County, Ala. until 5:15 p.m. CT (6:15 p.m. ET). At 3:48 p.m. CT, a severe thunderstorm was located over Talladega Municipal Airport or 8 miles northeast of Talladega, moving east at 35 mph.  (Although Cleburne County is in Alabama, it is part of the 11Alive viewing area.)

4:27 P.M. -- FLOOD WARNING for Big Creek near Alpharetta affecting Fulton and Forsyth counties has been extended until Friday, April 7, 2017. Flood stage is 7.0 feet. At 3 pm, the stage was 7.6 feet and rising. Minor flooding was occurring. The river will continue to rise to near 8.1 feet by midnight tomorrow.

2:55 P.M. -- New TORNADO WATCH has been issued for FAR northwest Georgia: Catoosa, Chattooga, Dade, Walker Counties and Randolph County, Ala. and is in effect until 10:00 p.m.

Some of the weather has slowed in the metro Atlanta area, but 11Alive's Chris Holcomb warns that people should still be prepared for a third round of severe weather, expected to ramp up between 9:30 to 10:30 p.m.

1:30 P.M. -- The ground stop has been lifted at Atlanta's airport. While the system seems to weakening in many areas, 11Alive StormTracker Chris Holcomb said that another round of strong storms is possible. 

1:26 P.M. -- A FLASH FLOOD WARNING has been issued for Central Fulton County until 7:30 pm. 

1:17 P.M. -- The University of North Georgia says all classes on all campuses are canceled for the day. More closings and delays.

1:02 P.M. -- A TORNADO WATCH affected dozens of Georgia counties has been extended until 8 p.m. 

The Tornado Watch is in effect in these counties: Appling, Atkinson, Bacon, Baker, Baldwin, Ben Hill, Berrien, Bibb, Bleckley, Bulloch, Burke, Butts, Calhoun, Candler, Chattahoochee, Clay, Coffee, Colquitt, Columbia, Cook, Crawford, Crisp, Decatur, Dodge, Dooly, Dougherty, Early, Emanuel, Evans, Glascock, Grady, Greene, Hancock, Harris, Houston, Irwin, Jasper, Jeff Davis, Jefferson, Jenkins, Johnson, Jones, Lamar, Laurens, Lee, Lincoln, Macon, Marion, McDuffie, Meriwether, Miller, Mitchell, Monroe, Montgomery, Morgan, Muscogee, Peach, Pike, Pulaski, Putnam, Quitman, Randolph, Richmond, Schley, Screven, Seminole, Spalding, Stewart, Sumter, Talbot, Taliaferro, Tattnall, Taylor, Telfair, Terrell, Thomas, Tift, Toombs, Treutlen, Troup, Turner, Twiggs, Upson, Warren, Washington, Webster, Wheeler, Wilcox, Wilkes, Wilkinson, Worth

12:44 P.M. -- A Flash Flood Warning is in effect in Cobb County until 4:45 p.m. 

11:36 A.M. -- A Flash Flood Warning is in effect for DeKalb and Gwinnett counties until 5:30 pm

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Other flood alerts and flash flood warnings have been put in place across the metro area. Stay alert and watch for rapidly rising water with little or no warning. 

A Severe Thunderstorm Warning is in effect in the following counties until 12:45 p.m.: Banks, Barrow, Clarke, Gwinnett, Jackson, Madison, Oconee, Rockdale, Walton

12:03 P.M. -- Zoo Atlanta is closing at noon due to weather. More closings and delays.

11:51 A.M. - A Severe Thunderstorm Warning is in effect in Greene, Oglethorpe and Wilkes counties until 12: 15 p.m.

A Flash Flood Warning is in effect in DeKalb and Gwinnett counties until 5:30 p.m. 

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EARLIER UPDATES:

A tornado warning has expired for five Georgia counties.

People in Fayette, Carroll, Heard, Coweta and Southwestern Fulton counties were under the tornado warning until 9:00 AM.

A ground stop remains in effect at Hartsfield-Jackson Atlanta International Airport. (Click here for the latest on that.)

At 814 AM EDT, a severe thunderstorm capable of producing a tornado was located over Plant Wansley, or 7 miles north of Franklin, moving east at 45 mph. There was radar indicated rotation.

Other severe thunderstorm warnings have been posted for portions of metro Atlanta over the course of the morning hours. 

Now, a tornado watch continues for metro Atlanta and north Georgia until 1 pm.

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