Portland reaches the mid-70s Sunday before a cooler week settles in. Rain chances increase by Friday.

Las Vegas will see warm conditions Sunday before scattered showers and thunderstorms become possible Monday afternoon and evening. Temperatures should warm slightly after the rain chances before cooling later in the work week.

Marine-layer clouds start the week before warming resumes Tuesday and inland highs reach the 90s Wednesday and Thursday.

Sacramento starts Sunday with generally seasonable weather, while a dry warmup continues into Thursday.

A look at the Salt Lake City weather outlook.

Denver should stay mostly dry Sunday, though morning showers are possible and storms could develop later. Warmer weather is expected during the second half of the week.

Knoxville faces another round of 93-degree heat Sunday and Monday before widespread storms and cooler weather arrive midweek.

Showers and thunderstorms are headed for Baltimore Sunday before a cooler, wetter pattern settles in for much of the week.

Rain arrives in Boston late Sunday morning, followed by a cooler, windier week and a possible coastal storm late week.

Storms could rumble through Oklahoma City Sunday, followed by cooler conditions Monday and through midweek.

Dallas will hit near 100 Sunday, with evening storms possible across North Texas. A few could bring hail and damaging winds.

Minneapolis will cool off under clouds Sunday and Monday before dry weather arrives Tuesday. Temperatures climb back into the low 70s by next weekend.

Kansas City starts Sunday with light rain and a chance of thunderstorms before cooler weather arrives Monday.