The US National Weather Service said the region stretching from the Southern Plains into the Mississippi Valley will see the setting up of a multiple day heavy rainfall event, with a peak in intensity expected during the long holiday weekend.
Eastern Colorado is expected to experience the potential development of widely scattered thunderstorms from Thursday afternoon, with large hail likely being the primary hazard, the agency said.
The NWS issued a freeze warning early Thursday for New York's Malone, Plattsburg, Saranac Lake, Old Forge, Glens Falls, and areas near Ogdensburg and Massena. National Grid (NGG) and Avangrid unit New York State Electric & Gas.
A similar warning was raised for areas near Newport and St Johnsbury, served by Energir subsidiary Green Mountain Power.
Also placed under a freeze warning watch were Berlin in New Hampshire, primarily served by Eversource Energy (ES); and Maine's Rangeley, Farmington, and Rumford. The affected areas in Maine mostly fall under the service area of Avangrid unit Central Maine Power.
The NWS early Thursday issued a red flag warning for Nucla and Telluride in Colorado and Utah's Green River and Moab. Xcel Energy (XEL) and Black Hills unit (BKH) Black Hills Energy are the primary electricity providers in Colorado, while Utah primarily falls under the service area of PacifiCorp's Rocky Mountain Power.
A winter storm warning was raised for Montana's Red Lodge and Livingston, primarily served by NorthWestern Energy (NWE).
The NWS issued a flood warning for Nevada, Clinton, Maryville, Leavenworth, St. Joseph, Chillicothe, Carrollton, Warrensburg, Harrisonville, Butler, Columbia, Grant City, and Washington. Evergy (EVRG), Ameren's (AEE) Missouri unit, and Algonquin Power & Utilities (AQN) subsidiary Liberty are the major service providers in the state.
Flood warnings were also issued for certain areas in Indiana, Illinois, Louisiana, and Washington, while Junction in Texas was placed under a flash flood warning watch.