Forecast Details for Waterloo, IA

Recent Locations: Waterloo, IA  
Tonight: Showers and thunderstorms likely, mainly after 5am. Cloudy, with a low around 56. North wind 6 to 10 mph becoming east northeast after midnight. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday: Showers and thunderstorms before noon, then showers and possibly a thunderstorm, mainly after noon. High near 69. East wind 11 to 15 mph becoming south southeast in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night: Showers and thunderstorms, mainly before 1am. Low around 51. South southeast wind 11 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, with a high near 62. Breezy, with a west southwest wind 11 to 18 mph, with gusts as high as 29 mph.
Monday Night: Partly cloudy, with a low around 43. West wind 6 to 14 mph becoming south after midnight. Winds could gust as high as 21 mph.
Tuesday: A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 76. Windy. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night: Showers and possibly a thunderstorm before 1am, then a slight chance of showers and thunderstorms after 1am. Low around 49. Windy. Chance of precipitation is 80%.
Wednesday: A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 73. Chance of precipitation is 40%.
Wednesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 52.
Thursday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 69. Chance of precipitation is 60%.
Thursday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 47. Breezy.
Friday: Partly sunny, with a high near 66. Breezy.
Friday Night: Partly cloudy, with a low around 45.
Saturday: A 30 percent chance of showers. Partly sunny, with a high near 65. Breezy.

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Current U.S. National Radar--Current

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Current U.S. National Radar

National Weather Forecast--Current

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Today's National Weather Map

National Weather Forecast for Tomorrow

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North America Water Vapor (Moisture)

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Weather Topic: What is Precipitation?

Home - Education - Precipitation - Precipitation

Precipitation Next Topic: Rain

Precipitation can refer to many different forms of water that may fall from clouds. Precipitation occurs after a cloud has become saturated to the point where its water particles are more dense than the air below the cloud.

In most cases, precipitation will reach the ground, but it is not uncommon for precipitation to evaporate before it reaches the earth's surface. When precipitation evaporates before it contacts the ground it is called Virga. Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog and mist are not considered precipitation because the water vapor which constitutes them isn't dense enough to fall to the ground.

Next Topic: Rain

Weather Topic: What are Shelf Clouds?

Home - Education - Cloud Types - Shelf Clouds

Shelf Clouds Next Topic: Sleet

A shelf cloud is similar to a wall cloud, but forms at the front of a storm cloud, instead of at the rear, where wall clouds form.

A shelf cloud is caused by a series of events set into motion by the advancing storm; first, cool air settles along the ground where precipitation has just fallen. As the cool air is brought in, the warmer air is displaced, and rises above it, because it is less dense. When the warmer air reaches the bottom of the storm cloud, it begins to cool again, and the resulting condensation is a visible shelf cloud.

Next Topic: Sleet