Forecast Details for Spring Valley, WI

Recent Locations: Normal, AL Spring Valley, NY Spring Valley, WI

Today: A chance of showers before 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 41. East wind 5 to 10 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 possibly a thunderstorm. Low around 32. East wind around 10 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Saturday: Snow showers likely, possibly mixed with rain. Cloudy, with a high near 38. East northeast wind 5 to 10 mph becoming west 10 to 15 mph in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

Saturday Night: A 30 percent chance of snow showers before 7pm. Mostly cloudy, with a low around 29. West northwest wind around 15 mph, with gusts as high as 25 mph.

Sunday: Mostly sunny, with a high near 46. West northwest wind 10 to 15 mph.

Sunday Night: Partly cloudy, with a low around 29. West northwest wind around 10 mph.

Monday: A 20 percent chance of snow showers after 1pm. Partly sunny, with a high near 38. Northwest wind around 15 mph, with gusts as high as 25 mph.

Monday Night: Mostly clear, with a low around 19. North northwest wind 10 to 15 mph decreasing to 5 to 10 mph after midnight.

Tuesday: Mostly sunny, with a high near 45. Light and variable wind becoming south 5 to 10 mph in the morning.

Tuesday Night: A slight chance of snow showers before 10pm, then a chance of rain and snow showers. Mostly cloudy, with a low around 33. South southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.

Wednesday: A 30 percent chance of showers. Partly sunny, with a high near 62. South wind around 15 mph, with gusts as high as 30 mph.

Wednesday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 37. West wind around 15 mph, with gusts as high as 25 mph.

Thursday: A 40 percent chance of showers. Mostly cloudy, with a high near 52. North wind 10 to 15 mph.

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North America Water Vapor (Moisture)

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Weather Topic: What are Contrails?

Home - Education - Cloud Types - Contrails

Next Topic: Cumulonimbus Clouds

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Cumulonimbus Clouds

Weather Topic: What are Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle