Forecast Details for Sigourney, IA

Recent Locations: Sigourney, IA  
Current Alerts for Sigourney, IA: Freeze Warning
Tonight: Mostly clear, with a low around 31. Northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday: Sunny, with a high near 51. Northwest wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday Night: Widespread frost, mainly after 4am. Otherwise, mostly clear, with a low around 30. West wind 5 to 10 mph.
Sunday: Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 60. West wind 5 to 10 mph.
Sunday Night: Areas of frost after 4am. Otherwise, clear, with a low around 34.
Monday: Areas of frost before 8am. Otherwise, mostly sunny, with a high near 66. Breezy.
Monday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 49. Breezy.
Tuesday: A 50 percent chance of showers before 1pm. Partly sunny, with a high near 65.
Tuesday Night: Mostly clear, with a low around 38.
Wednesday: Sunny, with a high near 61.
Wednesday Night: Partly cloudy, with a low around 40.
Thursday: A 30 percent chance of showers. Partly sunny, with a high near 65.
Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 47. Chance of precipitation is 60%.
Friday: Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 65. Breezy. Chance of precipitation is 70%.

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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

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Tomorrows National Weather Map

North America Water Vapor (Moisture)

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North American Water Vapor Map

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