ATLANTA FORECAST

Today: Rainy. High: 64 

Tonight: More rain likely. Low: 50

Tomorrow: More showers and storms. High: 71

» For a detailed forecast, visit The Atlanta Journal-Constitution weather page.

The rain and clouds will clear overnight in metro Atlanta, but isolated yet strong storms will return Thursday, Channel 2 Action News meteorologist Brad Nitz said.

“What a big difference from 24 hours ago where we literally had a cloudless sky over Atlanta,” Nitz said earlier, comparing Tuesday’s sunshine with Wednesday’s showers.

Pedestrians deal with wet weather at Luckie Street and Centennial Olympic Park Drive. JOHN SPINK / JSPINK@AJC.COM

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Wednesday’s pollen count hit 577 particles of pollen per cubic meter of air, the highest it has been this year.

It doesn't touch last year's season high, recorded on March 31, at 3,559. And Wednesday's pollen count also doesn't come near the 2017 season high of 4,107.

Elsewhere in Georgia, rain remains the bigger concern, with a flash flood watch in effect in far North Georgia.

The watch is set to last until Thursday evening, according to the National Weather Service.

“Flash flooding is a very dangerous situation,” the NWS said. “You should monitor later forecasts and be prepared to take action should flash flood warnings be issued.”

The rain chance increases to 100 percent Thursday.

The heaviest rain is expected in far North Georgia. However, metro Atlanta could get up to 2 inches on the Northside and up to 1 inch on the Southside, Channel 2 reported.

“A cold front moves in with enough instability to produce strong storms with damaging winds on Thursday,” Channel 2 meteorologist Karen Minton said.

However, that cold front will not mean a drop in temperatures.

After a high of 64 degrees Wednesday, Atlanta is expected to see a high of 71 Thursday, Channel 2 reported.