An upper low will slide southeast from British Columbia into Washington overnight, with an upper low moving onto the southern and central California coast. Showers will develop in western Washington likely spreading into northwest Oregon and northern Washington, but dry and breezy conditions are expected for portions of the Inland Northwest. A stalled surface front stretching from northern California through the northern Great Basin will be a focus for additional dry and breezy conditions, with enough residual moisture to produce isolated to scattered thunderstorms in the central Sierra and from northeast Nevada into northern Utah, southeast Idaho, Wyoming, and the Colorado Rockies. Stronger winds aloft will also mix down to create locally elevated fire weather conditions in central Idaho, southwest and eastern Montana, and North Dakota. Scattered thunderstorms are likely from northwest Texas through Oklahoma into the Midwest, including severe thunderstorms in Oklahoma. Low relative humidity will develop from the Lower Mississippi Valley into portions of Texas, where breezy southerly winds are likely to overlap. Isolated to scattered thunderstorms are likely in South Florida, while showers are likely in Upstate New York and northern New England.