A storm system expected to form over the Central United States will bring the risk of severe thunderstorms and disruptive rain, beginning late Sunday.
Leftover moisture from Simon will join forces with a disturbance pushing across the Rockies this weekend. As the two systems get together to form one dynamic storm system, thunderstorms are forecast to erupt over portions of Texas, Oklahoma, Arkansas and Missouri Sunday afternoon.
According to Severe Weather Expert Henry Margusity, "For October, this could be a big outbreak of severe weather spanning late this weekend into the first part of next week."
The storms have the potential to become severe Sunday evening with the risk of damaging wind gusts, large hail and flash flooding being the main threats.
"A few of the strongest storms could produce a tornado as well," Margusity said.
The threat of severe thunderstorms will shift eastward and expand northward on Monday and will extend from the upper Texas coast to the lower Mississippi and Ohio valleys. The same violent weather risks from Sunday night will continue over this region.
During the period from Sunday night into Monday, travel disruptions, property damage and power outages are possible in the major cities of Dallas, Oklahoma City, Little Rock, Houston, Memphis, St. Louis and Shreveport, Louisiana. The storms will fire along the corridors of Interstate-10, I-20, I-30, I-40, I-44 and I-45.
During Monday night and Tuesday, the swath of stormy weather will continue to push eastward and expand northward.
According to AccuWeather Long Range Expert Paul Pastelok, "The nature of the storms beyond the day Monday may shift to more of a heavy rain and strong wind threat from the Tennessee Valley and southern Appalachians to the upper part of the Ohio Valley, central Appalachians and lower Great Lakes."
The risk of flash flooding and power outages will continue Monday night into midweek. The rain can overwhelm storm drains, especially those blocked with fallen leaves. Gusts in some of the bursts of heavy rain, with and without thunderstorms could still reach 55 mph.
A period of windswept rain and travel disruptions can affect areas along the I-95 corridor from by Wednesday from Raleigh, North Carolina, to Washington, D.C., Philadelphia and New York City. However, at this early stage, the risk of severe weather in part of the area from the Carolinas to the mid-Atlantic cannot be ruled out.
Ahead of the storms early next week, unusually warm and humid conditions for the middle of October will build from the South to parts of the Midwest and Northeast on stiff southerly winds.