Forecast Details for Jacob, IL

Recent Locations: Vale, NC Buffalo, NY Jacob, IL

Current Alerts for Jacob, IL: Flood Warning

Overnight: Patchy fog. Otherwise, partly cloudy, with a steady temperature around 62. Calm wind.

Saturday: Areas of fog before 9am. Otherwise, mostly sunny, with a high near 83. Calm wind becoming south around 5 mph.

Saturday Night: Mostly clear, with a low around 63. Calm wind.

Sunday: Sunny, with a high near 88. Light and variable wind.

Sunday Night: Mostly clear, with a low around 65. Light south southeast wind.

Monday: Mostly sunny, with a high near 88. Light south southeast wind becoming south 5 to 10 mph in the morning.

Monday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 69. South wind 6 to 8 mph.

Tuesday: A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 91. South wind 8 to 18 mph, with gusts as high as 28 mph.

Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. South wind 10 to 15 mph, with gusts as high as 24 mph.

Wednesday: A chance of showers and thunderstorms. Partly sunny, with a high near 86. Southwest wind 10 to 15 mph, with gusts as high as 21 mph.

Wednesday Night: Showers and thunderstorms likely. Partly cloudy, with a low around 61. South southwest wind 6 to 9 mph becoming west after midnight.

Thursday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 83. West wind 6 to 8 mph.

Thursday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 62. East northeast wind around 6 mph becoming light and variable.

Friday: A chance of showers and thunderstorms. Mostly sunny, with a high near 83. Southeast wind 5 to 9 mph becoming south southwest in the afternoon.

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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 Rain?

Home - Education - Precipitation - Rain

Rain Next Topic: Shelf Clouds

Precipitation in the form of water droplets is called rain. Rain generally has a tendency to fall with less intensity over a greater period of time, and when rainfall is more severe it is usually less sustained.

Rain is the most common form of precipitation and happens with greater frequency depending on the season and regional influences. Cities have been shown to have an observable effect on rainfall, due to an effect called the urban heat island. Compared to upwind, monthly rainfall between twenty and forty miles downwind of cities is 30% greater.

Next Topic: Shelf Clouds

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