Issued 359 PM EDT Fri Sep 21 2018 Valid Sat Sep 22 2018 - Mon Sep 24 2018 ...Heavy rain expected for the Southern plains and much cooler weather for the northern tier states... Ongoing widespread, heavy rain across much of Texas and Oklahoma have increased the threat of flooding across the Southern Plains today. Localized areas of 6 to 10 inches will be possible therefore WPC has issued a high risk for excessive rainfall and flash flooding. Although not as elevated, the area of...