This is severe and potentially dangerous heat, especially for vulnerable groups such as the homeless, the elderly and outdoor workers. Find ways to stay cool, stay hydrated, and avoid strenuous exercise during the hottest parts of the day. Fortunately, the heat wave will end on Thursday.
today is Monday): If your walk to work takes more than a few minutes, you may want to take a shower when you arrive. Hot weather will become noticeable early in the day and will get worse until peaking in the mid to late afternoon. Highs will be in the mid-90s and lows will be in the 100s, challenging record highs of 100 degrees at Reagan National Airport, 98 degrees at Dulles Airport and 102 degrees at BWI Marshall Airport. Considering the humidity (dew point near 70), it felt like 105 to 110. Breezes from the west and southwest at 5 to 10 mph will provide little relief. Trust: medium to high
tonight: Partly cloudy and quite muggy. For areas near downtown, temperatures will likely stay around 90 degrees into the night, with lows only settling into the low 80s.
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Tomorrow (Tuesday): Like today, but with a lower chance of showers or storms. Highs will again be in the 90s, lows will be in the 100s, and the peak heat index will be from 105 to 110. Trust: medium to high
Tomorrow evening: It's another uncomfortably muggy night, with lows likely to be around 80 degrees downtown and 70 degrees elsewhere. Showers or thunderstorms are possible late at night as the front approaches. Trust: medium to high
Looking to the future
We will have another chance to break through the century mark Wednesday, the heat index is as high as around 105, but a cold front will sweep through the area. As it clashes with moist air, heavy showers and storms are expected in the afternoon and evening, some of which may be severe. Showers and storms will decrease after sunset, with overnight lows in the 70s. Trust: medium to high
exist Thursday, a cold front slides to our south, but close enough that showers and storms are possible in the forecast, especially south and east of the region during the afternoon and evening. Not so hot with highs in the mid to upper 80s. After the overnight storm, Thursday night will be partly cloudy, with lows in the 70s to 75 degrees.
Friday Expected to be the nicest day of the week, with partly sunny skies, moderate humidity and temperatures in the mid to upper 80s. Partly cloudy at night, with temperatures in the cool 65s to 70s in cooler areas and 70s to 75s downtown. Reliability: Medium
The front that stalled to our south on Thursday and Friday may try to move north in 2019 Saturday, bringing clouds and the chance of showers and storms, especially in southern and eastern Washington. As the front moves north of the region Sunday, Temperature and humidity increase. Highs on Saturday are likely to be in the 80s, then Sunday could top the 90s. Lows should be mostly in the 70s. Reliability: Medium
Snow potential index
The chance of at least 1 inch of snowfall next week is assessed daily on a scale of 0-10.
