Forecast Details for Harvard, IL

Recent Locations: Harvard, IL  
This Afternoon: Sunny, with a high near 71. East southeast wind around 10 mph, with gusts as high as 15 mph.
Tonight: A 10 percent chance of showers and thunderstorms after 5am. Increasing clouds, with a low around 56. East wind 10 to 15 mph.
Tuesday: Showers and thunderstorms, mainly before 1pm. High near 74. East southeast wind 10 to 15 mph becoming west southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday Night: Mostly clear, with a low around 50. West southwest wind 5 to 10 mph, with gusts as high as 15 mph.
Wednesday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 73. Southwest wind 5 to 10 mph becoming southeast in the afternoon.
Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 49. Chance of precipitation is 70%.
Thursday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 57. Chance of precipitation is 60%.
Thursday Night: Partly cloudy, with a low around 41.
Friday: Sunny, with a high near 63.
Friday Night: Partly cloudy, with a low around 45.
Saturday: A chance of showers. Partly sunny, with a high near 66.
Saturday Night: Partly cloudy, with a low around 44.
Sunday: Mostly sunny, with a high near 64.

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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

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Tomorrows National Weather Map

North America Water Vapor (Moisture)

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North American Water Vapor Map

Weather Topic: What are Contrails?

Home - Education - Cloud Types - Contrails

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

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