Forecast Details for Holtwood, PA

Recent Locations: Helvetia, WV Holtwood, PA

Tonight: A chance of rain, mainly before 2am, then a slight chance of showers after 4am. Patchy fog. Otherwise, cloudy, with a low around 40. Southeast wind around 6 mph. Chance of precipitation is 30%.

Saturday: A chance of showers before 7am. Areas of fog before 10am. Otherwise, mostly cloudy, with a high near 53. South wind 5 to 8 mph. Chance of precipitation is 30%.

Saturday Night: Showers and thunderstorms likely. Mostly cloudy, with a temperature rising to around 60 by 1am. South wind 7 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday: A chance of showers, mainly before 1pm. Mostly cloudy, with a high near 64. West wind 7 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

Sunday Night: Partly cloudy, with a low around 41. Light west wind.

Monday: Sunny, with a high near 67.

Monday Night: Mostly clear, with a low around 48.

Tuesday: Sunny, with a high near 73.

Tuesday Night: A chance of showers after 1am. Mostly cloudy, with a low around 54. Chance of precipitation is 30%.

Wednesday: Showers likely, mainly after 1pm. Cloudy, with a high near 71. Chance of precipitation is 60%.

Wednesday Night: Showers likely. Cloudy, with a low around 44. Chance of precipitation is 60%.

Thursday: A chance of showers. Mostly cloudy, with a high near 53. Chance of precipitation is 30%.

Thursday Night: Mostly cloudy, with a low around 32.

Friday: Mostly cloudy, with a high near 48.

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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