Forecast Details for Pittsburgh, PA

Recent Locations: Hartford, CT Hollywood, FL Pittsburgh, PA

Overnight: Mostly cloudy, with a low around 14. Light south wind.

Friday: Snow, mainly before 4pm. High near 31. South wind 6 to 8 mph becoming west in the afternoon. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

Friday Night: Snow likely before 3am, then a chance of flurries between 3am and 4am. Cloudy, then gradually becoming partly cloudy, with a low around 3. Wind chill values as low as -14. Northwest wind 8 to 18 mph, with gusts as high as 36 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

Saturday: A slight chance of snow before 1pm. Partly sunny and cold, with a high near 14. Wind chill values as low as -16. Northwest wind 15 to 17 mph, with gusts as high as 33 mph. Chance of precipitation is 20%.

Saturday Night: Partly cloudy, with a low around -2. Northwest wind 5 to 9 mph becoming light west after midnight.

Sunday: Partly sunny, with a high near 19.

Sunday Night: Mostly cloudy, with a low around 5.

Monday: Mostly cloudy, with a high near 31.

Monday Night: Mostly cloudy, with a low around 19.

Tuesday: Mostly sunny, with a high near 42.

Tuesday Night: A chance of rain. Mostly cloudy, with a low around 31. Chance of precipitation is 50%.

Wednesday: Rain likely. Cloudy, with a high near 41. Chance of precipitation is 60%.

Wednesday Night: A chance of rain and snow. Cloudy, with a low around 23. Chance of precipitation is 40%.

Thursday: A chance of snow. Cloudy, with a high near 32. Chance of precipitation is 30%.

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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

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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 Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

Next Topic: Precipitation

Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

Rain Next Topic: Shelf Clouds

Precipitation in the form of water droplets is called rain. Rain generally has a tendency to fall with less intensity over a greater period of time, and when rainfall is more severe it is usually less sustained.

Rain is the most common form of precipitation and happens with greater frequency depending on the season and regional influences. Cities have been shown to have an observable effect on rainfall, due to an effect called the urban heat island. Compared to upwind, monthly rainfall between twenty and forty miles downwind of cities is 30% greater.

Next Topic: Shelf Clouds