Forecast Details for Pewaukee, WI

Recent Locations: Sublette, IL Keystone Heights, FL Pewaukee, WI

This Afternoon: A slight chance of rain showers before 1pm, then scattered rain and snow showers. Mostly cloudy, with a temperature falling to around 40 by 5pm. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

Tonight: Scattered snow showers, mainly before 10pm. Mostly cloudy, with a low around 21. North wind 5 to 10 mph. Chance of precipitation is 40%.

Tuesday: Sunny, with a high near 39. Calm wind becoming southeast around 5 mph in the afternoon.

Tuesday Night: A chance of snow showers between 1am and 4am, then a chance of rain showers after 4am. Increasing clouds, with a low around 26. Southeast wind 5 to 10 mph. Chance of precipitation is 30%.

Wednesday: A 30 percent chance of showers, mainly before 7am. Partly sunny, with a high near 61. Breezy, with a south wind 10 to 20 mph, with gusts as high as 30 mph.

Wednesday Night: Showers likely. Mostly cloudy, with a low around 50. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

Thursday: A 40 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 63. West wind around 10 mph.

Thursday Night: A chance of showers and thunderstorms, then showers likely after 1am. Mostly cloudy, with a low around 40. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday: A 30 percent chance of showers, mainly before 1pm. Partly sunny, with a high near 56.

Friday Night: Partly cloudy, with a low around 37.

Saturday: Mostly sunny, with a high near 56.

Saturday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 46.

Sunday: A 50 percent chance of showers. Mostly cloudy, with a high near 73.

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North America Water Vapor (Moisture)

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Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

Rain Next Topic: Shelf Clouds

Precipitation in the form of water droplets is called rain. Rain generally has a tendency to fall with less intensity over a greater period of time, and when rainfall is more severe it is usually less sustained.

Rain is the most common form of precipitation and happens with greater frequency depending on the season and regional influences. Cities have been shown to have an observable effect on rainfall, due to an effect called the urban heat island. Compared to upwind, monthly rainfall between twenty and forty miles downwind of cities is 30% greater.

Next Topic: Shelf Clouds

Weather Topic: What is Sleet?

Home - Education - Precipitation - Sleet

Sleet Next Topic: Snow

Sleet is a form of precipitation in which small ice pellets are the primary components. These ice pellets are smaller and more translucent than hailstones, and harder than graupel. Sleet is caused by specific atmospheric conditions and therefore typically doesn't last for extended periods of time.

The condition which leads to sleet formation requires a warmer body of air to be wedged in between two sub-freezing bodies of air. When snow falls through a warmer layer of air it melts, and as it falls through the next sub-freezing body of air it freezes again, forming ice pellets known as sleet. In some cases, water droplets don't have time to freeze before reaching the surface and the result is freezing rain.

Next Topic: Snow