Forecast Details for Rio, IL

Recent Locations: Spring Lake, MN Chester, MT Rio, IL

Current Alerts for Rio, IL: Flood Warning

Tonight: A 30 percent chance of showers and thunderstorms before 9pm. Some of the storms could be severe. Mostly cloudy, with a low around 43. Southwest wind 8 to 18 mph becoming northwest after midnight. Winds could gust as high as 31 mph.

Friday: A 30 percent chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 70. East southeast wind 5 to 11 mph, with gusts as high as 21 mph.

Friday Night: A chance of showers and thunderstorms before 7pm, then showers and possibly a thunderstorm between 7pm and 4am, then showers after 4am. Low around 47. Southeast wind 13 to 16 mph becoming west southwest after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Saturday: A 30 percent chance of showers before 1pm. Mostly cloudy, with a temperature falling to around 48 by 10am. Breezy, with a west wind 14 to 22 mph, with gusts as high as 31 mph.

Saturday Night: Partly cloudy, with a low around 35. Breezy, with a west northwest wind 14 to 20 mph, with gusts as high as 30 mph.

Sunday: Mostly sunny, with a high near 52. West northwest wind 13 to 15 mph, with gusts as high as 24 mph.

Sunday Night: Mostly clear, with a low around 35. West northwest wind 6 to 9 mph, with gusts as high as 17 mph.

Monday: Mostly sunny, with a high near 53.

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

Tuesday: Mostly sunny, with a high near 49.

Tuesday Night: Mostly cloudy, with a low around 36.

Wednesday: Partly sunny, with a high near 66. Breezy.

Wednesday Night: A chance of showers. Partly cloudy, with a low around 49.

Thursday: A chance of showers. Partly sunny, with a high near 68.

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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 is Sleet?

Home - Education - Precipitation - Sleet

Sleet Next Topic: Snow

Sleet is a form of precipitation in which small ice pellets are the primary components. These ice pellets are smaller and more translucent than hailstones, and harder than graupel. Sleet is caused by specific atmospheric conditions and therefore typically doesn't last for extended periods of time.

The condition which leads to sleet formation requires a warmer body of air to be wedged in between two sub-freezing bodies of air. When snow falls through a warmer layer of air it melts, and as it falls through the next sub-freezing body of air it freezes again, forming ice pellets known as sleet. In some cases, water droplets don't have time to freeze before reaching the surface and the result is freezing rain.

Next Topic: Snow

Weather Topic: What are Stratocumulus Clouds?

Home - Education - Cloud Types - Stratocumulus Clouds

Next Topic: Stratus Clouds

Stratocumulus clouds are similar to altocumulus clouds in their fluffy appearance, but have a slightly darker shade due to their additional mass.

A good way to distinguish the two cloud types is to hold your hand out and measure the size of an individual cloud; if it is the size of your thumb it is generally an altocumulus cloud, if it is the size of your hand it is generally a stratocumulus cloud.

It is uncommon for stratocumulus clouds to produce precipitation, but if they do it is usually a light rain or snow.

Next Topic: Stratus Clouds