101019 304 A powerful winterlike storm moving through the Great Plains was closing schools and causing travel headaches in several states, authorities said today. However, in Siouxland, we should see temperatures in the 30s overnight with some drizzle. Winter storm warnings and watches stretched from Wyoming and Montana through western Nebraska and into the Dakotas and Minnesota. Forecasters said the storm packs strong winds and double-digit snowfall totals, along with blizzardlike conditions