Forecast Details for Garnavillo, IA

Recent Locations: Lithonia, GA   Pawnee City, NE   Garnavillo, IA  
Today: Showers, with thunderstorms also possible after 1pm. High near 68. Southeast wind 3 to 6 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight: Patchy fog after 3am. Otherwise, partly cloudy, with a low around 55. Southeast wind around 5 mph becoming calm in the evening.
Sunday: Areas of fog before 8am. Otherwise, partly sunny, with a high near 77. Calm wind becoming southeast 5 to 9 mph in the morning.
Sunday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 62. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 78. South wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 64. South wind 5 to 7 mph.
Tuesday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 83. South wind 5 to 10 mph.
Tuesday Night: Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 61. South wind 6 to 9 mph becoming west after midnight. Chance of precipitation is 70%.
Wednesday: A 30 percent chance of showers and thunderstorms. Sunny, with a high near 79. West wind 8 to 14 mph, with gusts as high as 22 mph.
Wednesday Night: Mostly clear, with a low around 57. West wind 8 to 11 mph, with gusts as high as 20 mph.
Thursday: A 20 percent chance of showers. Sunny, with a high near 73. Breezy, with a northwest wind 10 to 17 mph, with gusts as high as 26 mph.
Thursday Night: Mostly clear, with a low around 54. Northwest wind 9 to 14 mph, with gusts as high as 23 mph.
Friday: A 20 percent chance of showers. Sunny, with a high near 74. Breezy, with a northwest wind 11 to 16 mph, with gusts as high as 24 mph.

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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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

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