Forecast Details for Round Lake, IL

Recent Locations: Eldon, IA Morganton, GA Round Lake, IL

Current Alerts for Round Lake, IL: Wind Advisory

Overnight: Showers and possibly a thunderstorm. Low around 35. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Thursday: Showers and possibly a thunderstorm, mainly before 5pm, then a chance of showers and thunderstorms after 5pm. High near 67. Breezy, with an east wind 15 to 25 mph becoming south southwest in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

Thursday Night: Showers and thunderstorms likely, mainly before midnight. Mostly cloudy, with a low around 44. Breezy, with a south southwest wind 20 to 25 mph becoming west 15 to 20 mph after midnight. Winds could gust as high as 40 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday: Partly sunny, with a high near 57. West wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 15 mph.

Friday Night: Showers and possibly a thunderstorm. Low around 40. East northeast wind 10 to 15 mph becoming southeast after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 100%.

Saturday: A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm. Mostly cloudy, with a high near 60. Breezy. Chance of precipitation is 30%.

Saturday Night: Mostly cloudy, with a low around 33.

Sunday: Partly sunny, with a high near 50.

Sunday Night: Mostly clear, with a low around 33.

Monday: Mostly sunny, with a high near 51.

Monday Night: Mostly cloudy, with a low around 29.

Tuesday: Mostly sunny, with a high near 44.

Tuesday Night: Mostly clear, with a low around 28.

Wednesday: Partly sunny, with a high near 56.

Want more detail? Get the Complete 7 Day and Night Detailed Forecast!

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