Forecast Details for Allison, IA

Recent Locations: Allison, IA  
Tonight: Showers and thunderstorms, mainly after 1am. Low around 57. Windy, with a southeast wind 13 to 21 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday: A chance of showers and thunderstorms before 10am, then a slight chance of showers after 5pm. Cloudy through mid morning, then gradual clearing, with a high near 73. Breezy, with a south wind 10 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night: Mostly clear, with a low around 49. South southwest wind 6 to 13 mph, with gusts as high as 23 mph.
Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 72. East southeast wind 6 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 49. Northeast wind 10 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Thursday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 61. Breezy. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night: Mostly clear, with a low around 40. Breezy.
Friday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 68.
Friday Night: Partly cloudy, with a low around 46.
Saturday: A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 67. Breezy.
Saturday Night: Mostly clear, with a low around 45.
Sunday: Mostly sunny, with a high near 72.
Sunday Night: Partly cloudy, with a low around 49.
Monday: Mostly sunny, with a high near 75.

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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).

Current U.S. National Radar

National Weather Forecast--Current

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Today's National Weather Map

National Weather Forecast for Tomorrow

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

Tomorrows National Weather Map

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.

North American Water Vapor Map

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