平原和中西部近5000万人处于警戒状态恶劣天气从周日到周一的爆发，包括龙卷风。
在新的恶劣天气警报发布之前，一个周末的破坏性风暴在密西西比州和德克萨斯州的部分地区引发了多次龙卷风。
据德克萨斯州怀斯县官员称，周六，在德克萨斯州失控湾的严重风暴中，一人死亡，数人受伤。穿过该地区的超级单体雷暴产生了棒球大小的冰雹和危险的阵风。
同一个超级单体雷暴还搅动了至少两个疑似龙卷风，一个在达拉斯西北约82英里的失控湾，另一个在德克萨斯州香农附近。
怀斯县法官克拉克(J.D. Clark)在一份声明中说，风暴在失控湾的多个社区造成了重大的结构性破坏，导致至少20个家庭流离失所。
位于达拉斯-沃斯堡的国家气象局(NWS)办公室表示，周日已派出小组调查风暴造成的损失。该机构证实，周六袭击失控湾的一场龙卷风在增强的藤田等级上被评为EF-2级，峰值风速为135英里/小时。
NWS还向美国广播公司证实，发生在落跑湾的死亡事件是龙卷风造成的。
据报道，周六晚些时候，在平原和西南部的部分地区，至少有12场未经证实的龙卷风，包括德克萨斯州的5场，俄克拉荷马州的6场和内布拉斯加州的1场。据报道，周六德克萨斯州和阿肯色州出现了比棒球还大的冰雹。
平原和中西部地区将面临更恶劣的天气
周日，堪萨斯州大部分地区，以及密苏里州西部和内布拉斯加州东南部的部分地区，包括堪萨斯州的威奇托市，预计恶劣天气的风险将达到5级中的3级。密苏里州堪萨斯城。NWS表示，龙卷风以及破坏性的大风和大冰雹可能会在周日席卷该地区。
根据NWS的说法，预计得克萨斯州北部、阿肯色州西北部、密苏里州西部、爱荷华州西南部、内布拉斯加州南部、俄克拉荷马州大部分地区和堪萨斯州大部分地区也将出现5级“轻微风险”的恶劣天气。
最大的龙卷风潜力集中在堪萨斯州上空，预计当地时间周日中午左右，强风暴将在下午晚些时候形成的恶劣天气之前开始爆发。
堪萨斯城和密苏里州圣约瑟夫地区也发布了洪水预警，那里可能会有两英寸或更多的降雨。
恶劣的天气持续到周一
周一，恶劣天气威胁向东北部蔓延，从密西西比河下游延伸至中西部。包括密苏里州圣路易斯在内的多个城市预计周一将出现5级“增强风险”的3级恶劣天气。爱荷华州锡达拉皮兹;阿肯色州琼斯博罗。印第安纳州埃文斯维尔。肯塔基州帕迪尤卡。和伊利诺伊州罗克福德。
周一，田纳西州孟菲斯市和伊利诺伊州芝加哥市的恶劣天气预报为5级“轻微风险”中的2级。威斯康星州密尔沃基市，肯塔基州路易斯维尔市。印第安纳州南本德。和爱荷华州梅森市。这些地区可能会经历龙卷风、大范围破坏性阵风、大冰雹和斑点状洪水。
预计周一的风暴系统还将在该国中部地区带来暴雨，引发孤立的山洪暴发。
预计周一大湖区也会有大雨。
50 million people on alert for more severe weather in the Plains and Midwest
Nearly 50 million people across the Plains and Midwest are on alert forsevere weatheroutbreaks, including tornadoes, from Sunday into Monday.
The new severe weather alerts follow a weekend of destructive storms that spawned multiple twisters in parts of Mississippi and Texas.
One person was killed and several others were injured during severe storms in Runaway Bay, Texas, on Saturday, according to Wise County, Texas, officials. A supercell thunderstorm that tracked through the area produced baseball-sized hail and dangerous wind gusts.
The same supercell thunderstorm also churned up at least two suspected tornadoes, one in Runaway Bay, about 82 miles northwest of Dallas, and another in nearby Shannon, Texas.
The storm caused significant structural damage across multiple neighborhoods in Runaway Bay, resulting in at least 20 families being displaced, Wise County Judge J.D. Clark said in a statement.
The National Weather Service (NWS) office in Dallas-Fort Worth said it dispatched teams on Sunday to survey storm damage. The agency confirmed that one tornado that hit Runaway Bay on Saturday was rated as an EF-2 on the Enhanced Fujita Scale, with peak winds of 135 mph.
The NWS also confirmed to ABC News that the death that occurred in Runaway Bay was the result of a tornado.
At least 12 unconfirmed tornadoes were reported late Saturday in parts of the Plains and Southwest, including five in Texas, six in Oklahoma and one in Nebraska. Hail larger than baseballs was reported in Texas and Arkansas on Saturday.
Plains and Midwest are in store for more severe weather
For Sunday, a level 3 out of 5 "enhanced risk" of severe weather is forecast for much of Kansas, as well as portions of western Missouri and southeastern Nebraska, including the cities of Wichita, Kan., Kansas City, Mo., and Beatrice, Neb. Tornadoes, as well as damaging winds and large hail, are possible across the area on Sunday, the NWS said.
The greatest tornado potential is centered on Sunday over Kansas, where strong storms are expected to begin firing off around noon local time on Sunday, ahead of the severe weather developing later in the afternoon.
A flood watch has also been issued for areas in Kansas City and St. Joseph, Missouri, where two inches of rain or more is possible.
Severe weather continues into Monday
On Monday, the severe weather threat spreads northeast and stretches from the lower Mississippi River Valley up to the Midwest. A level 3 out of 5 "enhanced risk" of severe weather is expected on Monday for multiple cities, including St. Louis, Mo., Cedar Rapids, Iowa; Jonesboro, Ark., Evansville, Ind., Paducah, Ky., and Rockford, Ill.
A level 2 out of 5 "slight risk" of severe weather is forecast on Monday for Memphis, Tenn., Chicago, Ill., Milwaukee, Wis., Louisville, Ky., South Bend, Ind., and Mason City, Iowa. These areas could experience tornadoes, widespread damaging wind gusts, large hail and spotty flash flooding.
Monday's storm system is also expected to produce heavy rain across the central part of the country, causing isolated flash flooding.
Heavy rain is also expected in the Great Lakes region on Monday.
