Powerful thunderstorms spawned tornadoes in Texas and Louisiana and dumped more than a foot of rain in some areas, while a low pressure system left nearly a foot of snow on the Upper Plains. The National Weather Service said tornadoes touched down near Nacogdoches, Lufkin and Huntington, Tex., and Anacoco, La. There were no reports of injuries or serious damage. More than 14 inches of rain fell at Longview and 13 inches at Henderson, Chalk Hill and Atlanta in east Texas, the weather service said. Six inches fell at Hope, Ark., and nearly that much at Texarkana. Some roads were flooded and others were washed out in northeast Texas. Some homes in Texarkana reported 2 feet of water inside. A dam failed near Henderson and some people had to be rescued from trees by boaters. In Panama, Okla., the Poteau River was 6 feet above flood stage. The weather service reported 11 inches of snow at Petersburg, N. D., 7 inches at Larimore and 4 inches at Grand Forks.