Forecast Details for Pittsburgh, PA

Recent Locations: Pittsburgh, PA

Overnight: A chance of showers. Cloudy, with a low around 63. East wind around 9 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

Saturday: Showers. High near 67. East wind 9 to 11 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Saturday Night: Showers. Low around 57. Southeast wind around 14 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Sunday: Showers, with thunderstorms also possible after 11am. High near 76. Southeast wind 9 to 11 mph becoming southwest in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday Night: Showers and possibly a thunderstorm, mainly before 2am. Low around 61. South wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Monday: Mostly cloudy, with a high near 75.

Monday Night: A chance of showers. Mostly cloudy, with a low around 56. Chance of precipitation is 40%.

Tuesday: Showers likely, mainly after 2pm. Partly sunny, with a high near 78. Chance of precipitation is 70%.

Tuesday Night: Showers likely, then showers and possibly a thunderstorm after 8pm. Low around 65. Chance of precipitation is 80%.

Wednesday: Showers likely, with thunderstorms also possible after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 60%.

Wednesday Night: Showers and thunderstorms. Low around 63. Chance of precipitation is 80%.

Thursday: Showers and possibly a thunderstorm. High near 80. Breezy. Chance of precipitation is 80%.

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

Friday: Showers likely. Partly sunny, with a high near 74. Chance of precipitation is 60%.

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

Weather Topic: What are Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle

Weather Topic: What is Evaporation?

Home - Education - Precipitation - Evaporation

Next Topic: Fog

Evaporation is the process which returns water from the earth back to the atmosphere, and is another crucial process in the water cycle.

Evaporation is the transformation of liquid into gas, and it happens because molecules are excited by the application of energy and turn into vapor. In order for water to evaporate it has to be on the surface of a body of water.

Next Topic: Fog