Forecast Details for Grand Tower, IL

Recent Locations: Edgecomb, ME Willimantic, CT Grand Tower, IL

Today: A slight chance of showers and thunderstorms between 9am and noon. Partly sunny, with a high near 83. South southwest wind 10 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.

Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 60. South wind 11 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

Saturday: Showers and possibly a thunderstorm before 1pm, then showers likely. Temperature falling to around 61 by 5pm. Southwest wind around 11 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 100%.

Saturday Night: Mostly cloudy during the early evening, then gradual clearing, with a low around 40. Northwest wind 5 to 10 mph.

Sunday: Sunny, with a high near 62. Northwest wind 5 to 10 mph.

Sunday Night: Clear, with a low around 39. North northwest wind around 6 mph becoming calm in the evening.

Monday: Sunny, with a high near 65. Light west northwest wind becoming north northwest 5 to 9 mph in the morning.

Monday Night: Partly cloudy, with a low around 38. North wind 6 to 8 mph.

Tuesday: Mostly sunny, with a high near 58. North northeast wind around 8 mph.

Tuesday Night: Partly cloudy, with a low around 39. Southeast wind around 6 mph.

Wednesday: Mostly sunny, with a high near 70. South wind 6 to 11 mph, with gusts as high as 18 mph.

Wednesday Night: Mostly clear, with a low around 51. South wind around 9 mph.

Thursday: Mostly sunny, with a high near 76. South wind 9 to 14 mph, with gusts as high as 22 mph.

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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 Condensation?

Home - Education - Precipitation - Condensation

Next Topic: Contrails

Condensation is the process which creates clouds, and therefore it is a crucial process in the water cycle. Condensation is the change of matter from a state of gas into a state of liquid, and it happens because water molecules release heat into the atmosphere and become organized into a more closely packed structure, what we might see as water droplets.

Water is always present in the air around us as a vapor, but it's too small for us to see. When water undergoes the process of condensation it becomes organized into visible water droplets. You've probably seen condensation happen before on the surface of a cold drink!

Next Topic: Contrails

Weather Topic: What are Cumulonimbus Clouds?

Home - Education - Cloud Types - Cumulonimbus Clouds

Cumulonimbus Clouds Next Topic: Cumulus Clouds

The final form taken by a growing cumulus cloud is the cumulonimbus cloud, which is very tall and dense. The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although most commonly they stop growing at an altitude of 6 km.

Even small cumulonimbus clouds appear very large in comparison to other cloud types. They can signal the approach of stormy weather, such as thunderstorms or blizzards.

Next Topic: Cumulus Clouds