Forecast Details for Princeton, NJ

Recent Locations: Walls, MS Magnolia, DE Princeton, NJ

Overnight: Patchy fog. Otherwise, mostly cloudy, with a low around 28. Calm wind.

Tuesday: Patchy fog before 11am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 46. Calm wind becoming southwest around 5 mph.

Tuesday Night: Increasing clouds, with a low around 34. Calm wind.

Wednesday: Rain likely, mainly after 1pm. Cloudy, with a high near 48. Calm wind becoming south around 5 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Wednesday Night: A slight chance of rain before 1am. Mostly cloudy, with a low around 37. Southwest wind around 5 mph becoming northwest after midnight. Chance of precipitation is 20%.

Thursday: A slight chance of rain after 1pm. Mostly cloudy, with a high near 47. Chance of precipitation is 20%.

Thursday Night: A chance of rain after 1am. Mostly cloudy, with a low around 33. Chance of precipitation is 50%.

Friday: Rain. High near 42. Chance of precipitation is 90%.

Friday Night: A chance of rain before 1am. Mostly cloudy, with a low around 33. Chance of precipitation is 40%.

Saturday: Mostly cloudy, with a high near 45.

Saturday Night: Partly cloudy, with a low around 29.

Sunday: A chance of rain and snow. Partly sunny, with a high near 39. Chance of precipitation is 40%.

Sunday Night: A chance of snow. Mostly cloudy, with a low around 25. Chance of precipitation is 30%.

Monday: Partly sunny, with a high near 37.

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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

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

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 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