Forecast Details for Merna, IL

Recent Locations: Jacksonville, FL Mesa, AZ Merna, IL

Current Alerts for Merna, IL: Wind Advisory

Today: Showers and thunderstorms likely before 2pm, then showers and possibly a thunderstorm between 2pm and 5pm, then showers and thunderstorms likely after 5pm. High near 72. Windy, with a south wind 17 to 22 mph increasing to 28 to 33 mph in the afternoon. Winds could gust as high as 46 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight: Showers and thunderstorms likely before 1am, then a slight chance of showers between 1am and 3am. Partly cloudy, with a low around 52. Breezy, with a south southwest wind 23 to 28 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 41 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Friday: Showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 75. Light and variable wind becoming south southeast 8 to 13 mph in the morning. 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 Night: Showers and possibly a thunderstorm. Low around 57. South southeast wind 14 to 18 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Saturday: A 50 percent chance of showers before 1pm. Mostly cloudy, with a high near 61. Breezy, with a west wind 16 to 23 mph, with gusts as high as 30 mph.

Saturday Night: Partly cloudy, with a low around 35. Breezy, with a west wind 17 to 20 mph, with gusts as high as 28 mph.

Sunday: Mostly sunny, with a high near 52. West northwest wind around 18 mph, with gusts as high as 25 mph.

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

Monday: Sunny, with a high near 57.

Monday Night: Partly cloudy, with a low around 31.

Tuesday: Mostly sunny, with a high near 53.

Tuesday Night: Mostly cloudy, with a low around 34.

Wednesday: Partly sunny, with a high near 66. Breezy.

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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 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

Weather Topic: What are Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

Next Topic: Precipitation