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A widespread and significant tornado threat, one of the most substantial in years, is endangering lives and property across the central and southern Plains through Monday night.
Hurricane season doesn't officially begin until June 1, but the Atlantic Basin already has its first named storm of the year.
As AAA expects nearly 43 million Americans to travel this Memorial Day holiday weekend, up 3.6 percent from last year, stormy weather will create trouble for some areas. Meanwhile, summerlike heat will prevail in other areas of the country.