Forecast Details for Herrin, IL

Recent Locations: Mapleton, OR Jackson, WY Herrin, IL

Overnight: Clear, with a low around 55. South wind around 9 mph.

Thursday: Sunny, with a high near 78. South southwest wind 9 to 14 mph, with gusts as high as 22 mph.

Thursday Night: Mostly clear, with a low around 57. South wind around 8 mph.

Friday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80. South southwest wind 8 to 11 mph becoming west in the afternoon. Winds could gust as high as 20 mph.

Friday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 56. North wind around 6 mph becoming light and variable in the evening. Chance of precipitation is 40%.

Saturday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80. East northeast wind around 6 mph becoming south southeast in the afternoon.

Saturday Night: Partly cloudy, with a low around 61. Southeast wind around 6 mph.

Sunday: Partly sunny, with a high near 83. South southwest wind 7 to 17 mph, with gusts as high as 26 mph.

Sunday Night: A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 66. South wind around 15 mph, with gusts as high as 25 mph.

Monday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 82. Breezy, with a south southwest wind 15 to 20 mph, with gusts as high as 29 mph.

Monday Night: Mostly cloudy, with a low around 69. South southwest wind 13 to 15 mph, with gusts as high as 23 mph.

Tuesday: A chance of showers and thunderstorms. Partly sunny, with a high near 84. South southwest wind 14 to 18 mph, with gusts as high as 26 mph.

Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. South southwest wind 11 to 14 mph, with gusts as high as 21 mph.

Wednesday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 79. South southwest wind 13 to 15 mph, with gusts as high as 23 mph.

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Weather Topic: What is Snow?

Home - Education - Precipitation - Snow

Snow Next Topic: Stratocumulus Clouds

Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake, has unique characteristics, but all of them grow in a hexagonal structure. Snowfall can last for sustained periods of time and result in significant buildup of snow on the ground.

On the earth's surface, snow starts out light and powdery, but as it begins to melt it tends to become more granular, producing small bits of ice which have the consistency of sand. After several cycles of melting and freezing, snow can become very dense and ice-like, commonly known as snow pack.

Next Topic: Stratocumulus Clouds

Weather Topic: What are Stratus Clouds?

Home - Education - Cloud Types - Stratus Clouds

Next Topic: Wall Clouds

Stratus clouds are similar to altostratus clouds, but form at a lower altitude and are identified by their fog-like appearance, lacking the distinguishing features of most clouds.

Stratus clouds are wider than most clouds, and their base has a smooth, uniform look which is lighter in color than a nimbostratus cloud. The presence of a stratus cloud indicates the possibility of minor precipitation, such as drizzle, but heavier precipitation does not typically arrive in the form of a stratus cloud.

Next Topic: Wall Clouds