As many as 25,000 Twin Cities residents will be without power until tomorrow, four days after tornadoes and thunderstorms swept through the area. Northern States Power company says Friday's storms knocked out electricity to more than 400,000 customers in Minnesota and parts of the Dakotas. The utility says the storms affected more households than a l996 ice storm. Cleanup crews are hauling away debris and dealing with the thousands of downed trees caused by the storm. Minnesota Public Radio's Dan Olson reports. The beads of perspiration popping from John Schotzsnyder's forehead gleam in the midday sun. He welcomes a chance to take a break from storm clean up to show a visitor the damage to his Shoreview home and the trees on his lot. Several damaged boughs hang precarious