Forecast Details for McKeesport, PA

Recent Locations: McKeesport, PA

Today: A chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 76. Breezy, with a southwest wind 14 to 21 mph, with gusts as high as 36 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight: A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 9pm. Partly cloudy, with a low around 54. West wind 9 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday: Partly sunny, with a high near 71. West wind 11 to 15 mph.

Sunday Night: Partly cloudy, with a low around 49. Northwest wind 5 to 9 mph becoming light after midnight.

Monday: Mostly sunny, with a high near 71. Light northwest wind increasing to 5 to 9 mph in the morning.

Monday Night: Partly cloudy, with a low around 45.

Tuesday: A chance of showers after 2pm. Partly sunny, with a high near 69. Chance of precipitation is 30%.

Tuesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8pm. Low around 54. Chance of precipitation is 80%.

Wednesday: Showers, with thunderstorms also possible after 2pm. High near 67. Chance of precipitation is 90%.

Wednesday Night: Showers and possibly a thunderstorm. Low around 50. Chance of precipitation is 80%.

Thursday: Showers likely. Mostly cloudy, with a high near 61. Chance of precipitation is 70%.

Thursday Night: A chance of showers. Mostly cloudy, with a low around 46. Chance of precipitation is 50%.

Friday: A chance of showers. Partly sunny, with a high near 63. Chance of precipitation is 50%.

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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)

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Weather Topic: What are Shelf Clouds?

Home - Education - Cloud Types - Shelf Clouds

Shelf Clouds Next Topic: Sleet

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: Sleet

Weather Topic: What is Snow?

Home - Education - Precipitation - Snow

Snow Next Topic: Stratocumulus Clouds

Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake, has unique characteristics, but all of them grow in a hexagonal structure. Snowfall can last for sustained periods of time and result in significant buildup of snow on the ground.

On the earth's surface, snow starts out light and powdery, but as it begins to melt it tends to become more granular, producing small bits of ice which have the consistency of sand. After several cycles of melting and freezing, snow can become very dense and ice-like, commonly known as snow pack.

Next Topic: Stratocumulus Clouds