The article details the weather forecast for Washington D.C., with mostly sunny skies today, a high near 80, and intermittent chances of showers and thunderstorms throughout the week.

Philadelphia weather forecast includes sun and clouds today with highs around 80°F, light winds, and evening lows near 63°F. Chance of showers increases through the week.

The National Weather Service issued a Hazardous Weather Outlook for Twin Cities, warning of potential afternoon and evening thunderstorms with possible large hail.

Seattle experiences morning drizzle with 100% humidity, but conditions are expected to clear with a high of 67°F. The week ahead promises sunny days with temperatures in the low to mid-70s.

The National Weather Service forecasts a hot week for Austin with high temperatures close to 100 degrees, a slight chance of rain midweek, and a gradual cool down by the weekend.

Breezy trade winds and an upper-level low bring showers to Hawaii, affecting mainly windward slopes. Weather is expected to improve with a dry spell later in the week. Aviation and marine sectors are warned of moderate winds and potential turbulence.

The National Weather Service Las Vegas forecasts slight chances of rain and thunderstorms in the Southwest, with uncertain conditions later in the week.

The latest weather reports indicate a series of sunny days in Sacramento, with temperatures hitting the high 90s early in the week before a slight cooling, and a slight chance of showers midweek.

The National Weather Service predicts a mix of cloudy skies and sunshine for Los Angeles, with gradually warming temperatures and a slight chance of showers and thunderstorms early in the week.

San Diego experiences cooler temperatures, increased cloud cover, and potential light rain and thunderstorms, especially in the mountains, as forecasted by the NWS.

Phoenix's weather forecast indicates varied conditions, with chances of rain and thunderstorms, high temperatures around 101-104 degrees, and mild winds changing direction throughout the week.

The NWS forecasts intermittent showers and thunderstorms for Nashville with varying chances of rain throughout the week, and warm temperatures persisting.

Houston anticipates a stormy week with moderate temperatures and consistent humidity, including likely showers and thunderstorms today, as forecasted by the National Weather Service.