Forecast Details for Merna, IL

Recent Locations: Tracy, CA Intercourse, PA Merna, IL

Current Alerts for Merna, IL: Wind Advisory

Tonight: Showers and possibly a thunderstorm. Low around 42. East wind 16 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Thursday: Showers and thunderstorms likely before 1pm, then showers likely and possibly a thunderstorm between 1pm and 5pm, then a chance of showers and thunderstorms after 5pm. Cloudy, with a high near 73. Windy, with a south wind 18 to 23 mph increasing to 27 to 32 mph in the afternoon. Winds could gust as high as 44 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday Night: Showers and possibly a thunderstorm before 1am, then a slight chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers after 4am. Low around 56. Breezy, with a south southwest wind 23 to 28 mph decreasing to 13 to 18 mph after midnight. Winds could gust as high as 39 mph. Chance of precipitation is 80%. 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 after 1pm. Partly sunny, with a high near 77. South wind 8 to 16 mph, with gusts as high as 22 mph.

Friday Night: Showers and possibly a thunderstorm. Low around 54. South wind 14 to 17 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Saturday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 62. Breezy, with a west wind 15 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

Saturday Night: Mostly cloudy, with a low around 34. Breezy, with a west wind 18 to 22 mph, with gusts as high as 26 mph.

Sunday: Mostly sunny, with a high near 52. Breezy.

Sunday Night: Mostly clear, with a low around 34.

Monday: Sunny, with a high near 58.

Monday Night: Partly cloudy, with a low around 33.

Tuesday: Mostly sunny, with a high near 52.

Tuesday Night: Partly cloudy, with a low around 32.

Wednesday: Partly sunny, with a high near 63.

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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 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