Forecast Details for Holtwood, PA

Recent Locations: Holtwood, PA  
Today: A chance of showers after 1pm. Cloudy, with a high near 58. South wind 10 to 13 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Tonight: Mostly cloudy, with a low around 49. South wind 7 to 10 mph.
Sunday: A slight chance of showers after 2pm. Mostly sunny, with a high near 81. South wind 6 to 9 mph becoming west in the afternoon. Chance of precipitation is 20%.
Sunday Night: Mostly clear, with a low around 60. South wind around 6 mph becoming west after midnight.
Monday: Sunny, with a high near 85. Northwest wind 6 to 8 mph.
Monday Night: Partly cloudy, with a low around 61.
Tuesday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 40%.
Tuesday Night: A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 59. Chance of precipitation is 30%.
Wednesday: Mostly sunny, with a high near 77.
Wednesday Night: Partly cloudy, with a low around 53.
Thursday: Mostly sunny, with a high near 75.
Thursday Night: Partly cloudy, with a low around 56.
Friday: A chance of showers. Partly sunny, with a high near 76. Chance of precipitation is 40%.

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Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

Current U.S. National Radar

National Weather Forecast--Current

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Today's National Weather Map

National Weather Forecast for Tomorrow

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

Tomorrows National Weather Map

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.

North American Water Vapor Map

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