Tom Brenner for The New York Times The northwest staircase, where protestors overwhelmed Capitol police officers four years ago, was fortified on Monday.

Thank you for reporting this station. We will review the data in question. You are about to report this weather station for bad data. Please select the information that is incorrect.

Partly cloudy. Medium chance of showers. The chance of a thunderstorm. Winds northeast to southeasterly 15 to 25 km/h tending southeast to southwesterly 15 to 20 km/h in the evening. Sun protection ...