Forecast Details for Lannon, WI

Recent Locations: Braggs, OK Cheltenham, MD Lannon, WI

Tonight: A chance of rain between 10pm and 1am, then rain or freezing rain. Low around 32. East wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. Total nighttime ice accumulation of less than a 0.1 of an inch possible.

Thursday: Rain and possibly a thunderstorm before 7am, then showers and possibly a thunderstorm, mainly after 7am. High near 64. East wind around 15 mph becoming south in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

Thursday Night: Showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 1am. Low around 41. South wind around 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday: Partly sunny, with a high near 51. West wind 5 to 10 mph becoming east in the afternoon.

Friday Night: Showers and possibly a thunderstorm. Low around 38. East wind around 10 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Saturday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm. Mostly cloudy, with a high near 54. Breezy, with a south wind 10 to 20 mph becoming west in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 40%.

Saturday Night: Mostly cloudy, with a low around 32. Breezy, with a west wind 15 to 20 mph, with gusts as high as 25 mph.

Sunday: Partly sunny, with a high near 47. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.

Sunday Night: Partly cloudy, with a low around 32.

Monday: A slight chance of rain and snow showers before 10am, then a slight chance of rain showers. Mostly sunny, with a high near 49. Chance of precipitation is 20%.

Monday Night: A slight chance of rain and snow showers. Mostly cloudy, with a low around 26. Chance of precipitation is 20%.

Tuesday: Mostly sunny, with a high near 42.

Tuesday Night: Mostly clear, with a low around 28.

Wednesday: A slight chance of rain and snow showers. Mostly sunny, with a high near 53. Chance of precipitation is 20%.

Want more detail? Get the Complete 7 Day and Night Detailed Forecast!

Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

National Weather Forecast--Current

The Current National Weather Forecast and National Weather Map are shown below.

National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

Weather Topic: What are Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

Next Topic: Precipitation

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