A trough of low pressure will dig into the Southwest on Monday, while a low pressure system brushes across northern New England.
An area of low pressure will move south southeastward across the Southwest. Warm and humid air over the Plains will set the stage for strong to severe thunderstorms. Severe thunderstorms will be possible in northeast New Mexico, southeast Colorado, northern Texas, western Oklahoma and southwest Kansas. These thunderstorms will be capable of producing large hail, dangerous straight line winds and isolated thunderstorms. Prolonged heavy rain will bring threats of flash flooding to northern Oklahoma, southeast Kansas and southern Missouri. Showers and high elevation snow will also trail this system across the Intermountain West, the Pacific Northwest and the Great Basin.
Meanwhile, a stationary front will extended eastward from the southern Plains to the Southeast. Showers and thunderstorms will develop over parts of the western Gulf Coast and the Southeast. Due to several days of heavy rain, flash flooding will be possible in southeast Texas and southern Louisiana.
To the north, a low pressure system will inch across northern New England. A mixture of rain and snow will develop in Upstate New York and northern New England. Another area of low pressure will swing across the Midwest. This system will generate a swath of light to moderate showers from the upper Mississippi Valley to southern New York. Afternoon temperatures will remain 10 to 20 degrees below normal across the northern Plains, the Midwest, the Mid-Atlantic and New England.
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