Forecast Details for New Castle, PA

Recent Locations: New Castle, PA  
Today: Showers and thunderstorms, mainly before 3pm. High near 75. Calm wind becoming south 5 to 9 mph in the morning. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight: Showers and thunderstorms likely before 11pm, then a slight chance of showers between 11pm and midnight. Mostly cloudy, with a low around 54. Northwest wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Monday: Mostly cloudy, with a high near 75. North wind around 7 mph.
Monday Night: Mostly cloudy, with a low around 51. North wind 5 to 7 mph becoming light and variable after midnight.
Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 78. South wind 5 to 7 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night: A chance of showers and thunderstorms before 8pm, then showers and possibly a thunderstorm between 8pm and 5am, then showers after 5am. Low around 62. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday: A chance of showers. Mostly sunny, with a high near 80. Chance of precipitation is 40%.
Wednesday Night: A chance of showers and thunderstorms, then showers after 2am. Low around 58. Chance of precipitation is 80%.
Thursday: Showers, with thunderstorms also possible after 2pm. High near 74. Chance of precipitation is 80%.
Thursday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 52. Chance of precipitation is 60%.
Friday: Showers and thunderstorms likely. Mostly cloudy, with a high near 65. Chance of precipitation is 60%.
Friday Night: Showers likely. Partly cloudy, with a low around 45. Chance of precipitation is 60%.
Saturday: 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 for Tomorrow

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North America Water Vapor (Moisture)

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Weather Topic: What is Precipitation?

Home - Education - Precipitation - 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

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