Forecast Details for Olney, IL

Recent Locations: Placida, FL Gleason, WI Olney, IL

This Afternoon: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Cloudy, with a high near 78. Breezy, with a south wind around 26 mph, with gusts as high as 40 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight: Showers and thunderstorms likely, mainly before 9pm. Cloudy, then gradually becoming partly cloudy, with a low around 63. Breezy, with a south wind 17 to 22 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 36 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday: A 50 percent chance of showers and thunderstorms, mainly before 4pm. Mostly cloudy, with a high near 80. South southwest wind 9 to 15 mph, with gusts as high as 24 mph.

Friday Night: Showers likely and possibly a thunderstorm, mainly after 1am. Mostly cloudy, with a low around 61. South wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Saturday: Showers and possibly a thunderstorm. High near 68. South southwest wind around 15 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

Saturday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 40. West northwest wind 8 to 11 mph, with gusts as high as 20 mph.

Sunday: Sunny, with a high near 56. West northwest wind 8 to 13 mph, with gusts as high as 20 mph.

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

Monday: Sunny, with a high near 60.

Monday Night: Mostly clear, with a low around 35.

Tuesday: Sunny, with a high near 53.

Tuesday Night: Mostly clear, with a low around 35.

Wednesday: Mostly sunny, with a high near 65.

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North America Water Vapor (Moisture)

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Weather Topic: What is Graupel?

Home - Education - Precipitation - Graupel

Graupel Next Topic: Hail

Graupel is a form of precipitation that is created by atmospheric conditions which cause supercooled water droplets to contact snow crystals and freeze to their surface.

Sometimes known as soft hail or snow pellets, graupel is delicate and easily destroyed by touch. Whereas hail usually falls during severe weather, graupel doesn't require such conditions to form, and can form in mild precipitation similar to situations which produce snowfall.

Next Topic: Hail

Weather Topic: What are Hole Punch Clouds?

Home - Education - Cloud Types - Hole Punch Clouds

Hole Punch Clouds Next Topic: Mammatus Clouds

A hole punch cloud is an unusual occurrence when a disk-shaped hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.

When part of the cloud forms ice crystals, water droplets in the surrounding area of the cloud evaporate. The effect of this process produces a large elliptical gap in the cloud. The hole punch cloud formation is rare, but it is not specific to any geographic area.

Other names which have been used to describe this phenomena include fallstreak hole, skypunch, and cloud hole.

Next Topic: Mammatus Clouds