Forecast Details for Upper Marlboro, MD

Recent Locations: Ragsdale, IN Glendale, CA Upper Marlboro, MD

Overnight: A slight chance of showers. Cloudy, with a low around 72. East wind around 7 mph. Chance of precipitation is 20%.

Friday: A chance of showers and thunderstorms, mainly between 1pm and 5pm. Mostly cloudy, with a high near 79. East wind 7 to 9 mph. Chance of precipitation is 50%.

Friday Night: A chance of showers and thunderstorms before 3am, then a slight chance of showers after 5am. Mostly cloudy, with a low around 72. East wind around 6 mph becoming calm in the evening. Chance of precipitation is 50%.

Saturday: A slight chance of showers before 8am, then a chance of showers and thunderstorms after 2pm. Cloudy through mid morning, then gradual clearing, with a high near 92. Heat index values as high as 103. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 40%.

Saturday Night: A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 73. Light southwest wind. Chance of precipitation is 30%.

Sunday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91. Chance of precipitation is 30%.

Sunday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 73. Chance of precipitation is 30%.

Monday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 91. Chance of precipitation is 50%.

Monday Night: A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 74. Chance of precipitation is 30%.

Tuesday: Showers likely and possibly a thunderstorm, mainly after 2pm. Partly sunny, with a high near 90. Chance of precipitation is 70%.

Tuesday Night: Showers and thunderstorms likely. Mostly cloudy, with a low around 72. Chance of precipitation is 60%.

Wednesday: Mostly sunny, with a high near 90.

Wednesday Night: Partly cloudy, with a low around 70.

Thursday: Sunny, with a high near 90.

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Current U.S. National Radar--Current

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North America Water Vapor (Moisture)

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Weather Topic: What are Mammatus Clouds?

Home - Education - Cloud Types - Mammatus Clouds

Mammatus Clouds Next Topic: Nimbostratus Clouds

A mammatus cloud is a cloud with a unique feature which resembles a web of pouches hanging along the base of the cloud.

In the United States, mammatus clouds tend to form in the warmer months, commonly in the Midwest and eastern regions.

While they usually form at the bottom of a cumulonimbis cloud, they can also form under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds warn that severe weather is close.

Next Topic: Nimbostratus Clouds

Weather Topic: What is Precipitation?

Home - Education - Precipitation - Precipitation

Next Topic: Rain

Precipitation can refer to many different forms of water that may fall from clouds. Precipitation occurs after a cloud has become saturated to the point where its water particles are more dense than the air below the cloud.

In most cases, precipitation will reach the ground, but it is not uncommon for precipitation to evaporate before it reaches the earth's surface. When precipitation evaporates before it contacts the ground it is called Virga. Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog and mist are not considered precipitation because the water vapor which constitutes them isn't dense enough to fall to the ground.

Next Topic: Rain