Forecast Details for Glenarm, IL

Recent Locations: Vendor, AR Largo, FL Glenarm, IL

Overnight: A 40 percent chance of showers and thunderstorms. Patchy fog. Otherwise, cloudy, with a low around 42. Northeast wind around 8 mph.

Wednesday: Showers and thunderstorms before 4pm, then showers likely. Areas of fog. High near 53. East wind 5 to 8 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday Night: A chance of showers, then showers and possibly a thunderstorm after 9pm. Areas of fog. Low around 50. Northeast wind around 6 mph becoming southwest after midnight. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday: A 50 percent chance of showers before noon. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 63. West wind 5 to 10 mph, with gusts as high as 16 mph.

Thursday Night: Showers likely and possibly a thunderstorm between midnight and 3am, then showers likely after 3am. Mostly cloudy, with a low around 52. Light and variable wind becoming south 6 to 11 mph in the evening. Winds could gust as high as 18 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday: Showers likely, mainly before noon. Partly sunny, with a high near 76. Breezy, with a south wind 13 to 22 mph, with gusts as high as 33 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday Night: Showers and possibly a thunderstorm. Low around 51. South wind 15 to 18 mph becoming west southwest after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Saturday: A 40 percent chance of showers before noon. Partly sunny, with a high near 61.

Saturday Night: Mostly clear, with a low around 37.

Sunday: Sunny, with a high near 64.

Sunday Night: Mostly clear, with a low around 45.

Monday: Sunny, with a high near 73.

Monday Night: A chance of showers and thunderstorms. Mostly clear, with a low around 58.

Tuesday: Showers likely. Mostly cloudy, with a high near 75. Breezy.

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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