FARGO - A snowstorm that whipped through the southeastern part of the state on Monday grounded flights, closed schools and prompted the Highway Patrol to warn against driving.

Fargo reported more than 4 inches of snow early Monday afternoon, and more than a dozen schools in Fargo sent students home early and airlines canceled flights.

The North Dakota Highway Patrol Troopers warned against travel in Cass and Richland counties as a snowstorm hit the Red River Valley.

Capt. Al Salvatore said visibility was down to 500 feet in some areas around Fargo by late afternoon. Speed was reduced to less than 30 miles per hour on highways, he said.

"We've got very hazardous weather conditions," Salvatore said.

Troopers responded to about 20 vehicles in ditches and several jacknifed tractor-trailers by late afternoon.

A winter storm warning was issued for southeastern North Dakota, including the cities of Fargo and Wahpeton. The National Weather Service said near-blizzard conditions were possible and the area could get up to 8 inches before it ended.

"We've got winter," said Bruce Nord, a maintenance superintendent with the North Dakota Department of Transportation.

Nord said crews began cleaning the roads at about 10:30 a.m. and continued through most of the day.

Stranded travelers trickled into Fargo's Doublewood Inn, said Rudy Martinson, an employee at the hotel.

"It's snowing and the wind's blowing," Martinson said. "It's kind of an ugly day all around."

Not everyone thought so.

"The weather is wonderful," said Keith Olson, who manages Ben Franklin in Fargo. "We've got snow and we've got snow and we've got snow."

Olson said the snow didn't stop holiday shoppers.

"They may not be able to make it to work but they can certainly make it shopping," Olson said.