A rare winter storm charging through Texas and the northern Gulf Coast on Tuesday has closed highways and airports and prompted the first blizzard warning for southeast Texas and southwest Louisiana.

School districts across the New Orleans metro area canceled school again Thursday, the third day of cancellations due to the severe winter storm, raising the possibility of make-up school days later this year.

By noon, the National Weather Service had reported about 4 inches of snow in New Orleans. The storm prompted the first ever blizzard warnings for several coastal counties near the Texas-Louisiana border, and snow plows were at the ready in the Florida Panhandle, according to the Associated Press.