Forecast Details for Lebanon, PA

Recent Locations: Syria, VA Locust Grove, GA Lebanon, PA

Current Alerts for Lebanon, PA: Air Quality Alert

Tonight: Widespread dense fog, mainly after 2am. Otherwise, cloudy, with a low around 35. Calm wind.

Wednesday: Rain likely, mainly after 3pm. Widespread dense fog, mainly before 8am. Otherwise, cloudy, with a high near 47. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Wednesday Night: Mostly cloudy, with a low around 38. Southwest wind around 6 mph becoming northwest after midnight.

Thursday: A chance of rain after 1pm. Cloudy, with a high near 44. East wind 3 to 8 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

Thursday Night: Rain likely, mainly after 1am. Cloudy, with a low around 36. East wind 7 to 9 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday: Rain. High near 46. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Friday Night: Mostly cloudy, with a low around 35.

Saturday: Partly sunny, with a high near 49.

Saturday Night: A chance of rain and snow showers after 1am. Partly cloudy, with a low around 31. Chance of precipitation is 30%.

Sunday: A chance of snow showers. Mostly cloudy, with a high near 38. Chance of precipitation is 50%.

Sunday Night: A chance of snow showers. Mostly cloudy, with a low around 27. Chance of precipitation is 40%.

Monday: Partly sunny, with a high near 36. Breezy.

Monday Night: Mostly cloudy, with a low around 19.

Tuesday: Mostly sunny, with a high near 31.

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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 Contrails?

Home - Education - Cloud Types - Contrails

Next Topic: Cumulonimbus Clouds

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Cumulonimbus Clouds

Weather Topic: What are Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle