More than 800 flights delayed, 300 canceled at Chicago airports due to weather

CHICAGO (CBS)-- Severe storms have delayed hundreds of flights at Chicago airports Wednesday.

A tornado watch is in effect for the entire Chicago area through 10 p.m. Afternoon storms also could bring damaging winds, hail, and flash flooding.

As of 4 p.m., 626 flights have been delayed at O'Hare International Airport. There have been 321 flight cancellations. 

At Midway International Airport, 255 flights have been delayed and 32 flights have been canceled. 

This is a developing story.