Forecast Details for Ullin, IL

Recent Locations: Ullin, IL

This Afternoon: Mostly sunny, with a high near 87. South wind 11 to 13 mph, with gusts as high as 18 mph.

Tonight: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 63. South southeast wind 6 to 10 mph becoming north after midnight. Chance of precipitation is 80%.

Friday: Showers and thunderstorms likely, mainly before 1pm. Cloudy, with a high near 79. North wind 6 to 9 mph. Chance of precipitation is 60%.

Friday Night: A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 62. North wind 5 to 7 mph becoming calm after midnight.

Saturday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 82. Calm wind becoming southwest 5 to 7 mph in the morning. Chance of precipitation is 40%.

Saturday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 62. South wind around 6 mph becoming northwest after midnight.

Sunday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 81. Northwest wind 6 to 9 mph becoming southeast in the morning. Chance of precipitation is 70%.

Sunday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 63. South southeast wind 9 to 11 mph.

Monday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 81. South southwest wind 11 to 16 mph, with gusts as high as 25 mph.

Monday Night: A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 68. South wind around 16 mph, with gusts as high as 25 mph.

Tuesday: Showers and thunderstorms likely. Partly sunny, with a high near 84. Breezy, with a south southwest wind 17 to 22 mph, with gusts as high as 33 mph.

Tuesday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Breezy, with a south southwest wind 14 to 21 mph, with gusts as high as 31 mph.

Wednesday: A chance of showers and thunderstorms. Mostly sunny, with a high near 86. South southwest wind 15 to 18 mph, with gusts as high as 29 mph.

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North America Water Vapor (Moisture)

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Weather Topic: What are Mammatus Clouds?

Home - Education - Cloud Types - Mammatus Clouds

Mammatus Clouds Next Topic: Nimbostratus Clouds

A mammatus cloud is a cloud with a unique feature which resembles a web of pouches hanging along the base of the cloud.

In the United States, mammatus clouds tend to form in the warmer months, commonly in the Midwest and eastern regions.

While they usually form at the bottom of a cumulonimbis cloud, they can also form under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds warn that severe weather is close.

Next Topic: Nimbostratus Clouds

Weather Topic: What is Precipitation?

Home - Education - Precipitation - Precipitation

Next Topic: Rain

Precipitation can refer to many different forms of water that may fall from clouds. Precipitation occurs after a cloud has become saturated to the point where its water particles are more dense than the air below the cloud.

In most cases, precipitation will reach the ground, but it is not uncommon for precipitation to evaporate before it reaches the earth's surface. When precipitation evaporates before it contacts the ground it is called Virga. Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog and mist are not considered precipitation because the water vapor which constitutes them isn't dense enough to fall to the ground.

Next Topic: Rain