Forecast Details for Potomac, IL

Recent Locations: Springboro, OH Block Island, RI Potomac, IL

Current Alerts for Potomac, IL: Wind Advisory

This Afternoon: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 4pm. High near 74. Breezy, with a south wind 26 to 28 mph, with gusts as high as 46 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight: Showers and thunderstorms likely before 3am, then a slight chance of showers between 3am and 4am. Cloudy, then gradually becoming partly cloudy, with a low around 57. Breezy, with a south wind 19 to 24 mph decreasing to 11 to 16 mph after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Friday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 75. West southwest wind 6 to 10 mph becoming south in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday Night: Showers and possibly a thunderstorm. Low around 58. South wind 10 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

Saturday: Showers, mainly before 1pm. High near 67. South southwest wind 14 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

Saturday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 36. West wind 10 to 15 mph, with gusts as high as 22 mph.

Sunday: Mostly sunny, with a high near 52. West northwest wind 11 to 15 mph, with gusts as high as 22 mph.

Sunday Night: Mostly clear, with a low around 36.

Monday: Mostly sunny, with a high near 55.

Monday Night: Mostly clear, with a low around 30.

Tuesday: Mostly sunny, with a high near 49.

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

Wednesday: Mostly sunny, with a high near 63. 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 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

Weather Topic: What are Altocumulus Clouds?

Home - Education - Cloud Types - Altocumulus Clouds

Next Topic: Altostratus Clouds

Similar to cirrocumulus clouds, altocumulus clouds are characterized by cloud patches. They are distinguished by larger cloudlets than cirrocumulus clouds but are still smaller than stratocumulus clouds.

Altocumulus clouds most commonly form in middle altitudes (between 2 and 5 km) and may resemble, at times, the shape of a flying saucer. These uncommon formations, called altocumulus lenticularis, are created by uplift in the atmosphere and are most often seen in close proximity to mountains.

Next Topic: Altostratus Clouds