Forecast Details for Washington, DC

Your Recent Locations:  Washington, DC  
Tonight: Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 43. Light south wind.
Monday: Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 63. South wind 5 to 9 mph.
Monday Night: Showers likely, mainly after 1am. Increasing clouds, with a low around 50. South wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday: Showers and possibly a thunderstorm before 1pm, then a slight chance of showers. High near 64. South wind 10 to 14 mph becoming west in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night: Partly cloudy, with a low around 37. West wind 8 to 11 mph.
Wednesday: Mostly sunny, with a high near 45.
Wednesday Night: Partly cloudy, with a low around 29.
Thursday: Sunny, with a high near 43.
Thursday Night: Mostly clear, with a low around 26.
Friday: Sunny, with a high near 45.
Friday Night: Partly cloudy, with a low around 31.
Saturday: Partly sunny, with a high near 53.
Saturday Night: A chance of showers. Mostly cloudy, with a low around 44. Chance of precipitation is 40%.
Sunday: Showers likely. Cloudy, with a high near 59. Chance of precipitation is 60%.

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Weather Topic: What are Shelf Clouds?

Home - Education - Cloud Types - Shelf Clouds

shelf clouds Next Topic: Wall Clouds

A shelf cloud is similar to a wall cloud, but forms at the front of a storm cloud, instead of at the rear, where wall clouds form.

A shelf cloud is caused by a series of events set into motion by the advancing storm; first, cool air settles along the ground where precipitation has just fallen. As the cool air is brought in, the warmer air is displaced, and rises above it, because it is less dense. When the warmer air reaches the bottom of the storm cloud, it begins to cool again, and the resulting condensation is a visible shelf cloud.

Next Topic: Wall Clouds

Weather Topic: What is Condensation?

Home - Education - Precipitation - Condensation

condensation Next Topic: Drizzle

Condensation is the process which creates clouds, and therefore it is a crucial process in the water cycle. Condensation is the change of matter from a state of gas into a state of liquid, and it happens because water molecules release heat into the atmosphere and become organized into a more closely packed structure, what we might see as water droplets.

Water is always present in the air around us as a vapor, but it's too small for us to see. When water undergoes the process of condensation it becomes organized into visible water droplets. You've probably seen condensation happen before on the surface of a cold drink!

Next Topic: Drizzle