Forecast Details for Grafton, WI

Recent Locations: Grafton, WI

Tonight: Patchy fog between 9pm and 4am. Otherwise, mostly cloudy, with a low around 43. East wind 5 to 10 mph.

Monday: Showers and thunderstorms, mainly before 3pm, then showers likely and possibly a thunderstorm after 5pm. High near 58. Breezy, with a southeast wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Monday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 49. Southeast wind around 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Tuesday: A 10 percent chance of showers before 7am. Partly sunny, with a high near 60. West wind 10 to 15 mph, with gusts as high as 25 mph.

Tuesday Night: Mostly cloudy, with a low around 43. Northwest wind around 5 mph becoming north after midnight.

Wednesday: Partly sunny, with a high near 55. North wind 5 to 10 mph.

Wednesday Night: Partly cloudy, with a low around 39. Calm wind.

Thursday: A 20 percent chance of showers after 1pm. Mostly sunny, with a high near 54. Calm wind becoming northeast around 5 mph in the afternoon.

Thursday Night: Mostly cloudy, with a low around 38.

Friday: Mostly sunny, with a high near 52.

Friday Night: Areas of frost. Otherwise, partly cloudy, with a low around 36.

Saturday: Areas of frost. Otherwise, sunny, with a high near 57.

Saturday Night: Partly cloudy, with a low around 41.

Sunday: Mostly sunny, with a high near 63.

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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 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

Weather Topic: What are Stratocumulus Clouds?

Home - Education - Cloud Types - Stratocumulus Clouds

Next Topic: Stratus Clouds

Stratocumulus clouds are similar to altocumulus clouds in their fluffy appearance, but have a slightly darker shade due to their additional mass.

A good way to distinguish the two cloud types is to hold your hand out and measure the size of an individual cloud; if it is the size of your thumb it is generally an altocumulus cloud, if it is the size of your hand it is generally a stratocumulus cloud.

It is uncommon for stratocumulus clouds to produce precipitation, but if they do it is usually a light rain or snow.

Next Topic: Stratus Clouds