Forecast Details for Chambersburg, PA

Recent Locations: Chambersburg, PA  
Tonight: Mostly clear, with a low around 11. Southwest wind 5 to 9 mph, with gusts as high as 23 mph.
Thursday: Snow likely, mainly after 1pm. Cloudy, with a high near 28. South wind 6 to 9 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Thursday Night: Mostly cloudy, with a low around 22. Light west wind.
Friday: Mostly sunny, with a high near 38. West wind 5 to 7 mph.
Friday Night: Partly cloudy, with a low around 26. South wind around 6 mph.
Saturday: Rain and snow, becoming all rain after 1pm. High near 40. Chance of precipitation is 80%. Little or no snow accumulation expected.
Saturday Night: Mostly cloudy, with a low around 27.
Sunday: A chance of snow. Mostly cloudy, with a high near 33. Chance of precipitation is 30%.
Sunday Night: Mostly cloudy, with a low around 12.
M.L.King Day: Mostly sunny, with a high near 18.
Monday Night: Partly cloudy, with a low around 1.
Tuesday: Mostly sunny, with a high near 13.
Tuesday Night: Partly cloudy, with a low around 1.
Wednesday: Sunny, with a high near 20.

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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 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