Severe weather onslaught continues as big storms threaten holiday travel ABC NewsHigh Chance Of Tornadoes This Weekend – Videos from The Weather Channel The Weather ChannelDangerous severe weather with ‘violent’ tornadoes, extreme wind threatens millions over Memorial Day Weekend Fox Weather Day One SPC Outlook Has Moderate Risk for Oklahoma, Kansas, and SW Missouri alabamawx.comWhat is a derecho? Explaining the unusual storm that battered Houston. Houston Public Media