Forecast Details for Defiance, IA

Recent Locations: Morrill, NE Waucoma, IA Defiance, IA

Overnight: Partly cloudy, with a low around 35. Calm wind.

Thursday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 53. Calm wind becoming east 5 to 9 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday Night: Showers likely and possibly a thunderstorm before 1am, then a slight chance of showers between 1am and 3am. Cloudy, then gradually becoming partly cloudy, with a low around 33. Northeast wind 7 to 10 mph, with gusts as high as 17 mph. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

Friday: Mostly sunny, with a high near 56. Northeast wind around 9 mph.

Friday Night: A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 40. East wind 5 to 8 mph, with gusts as high as 16 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday: Showers and possibly a thunderstorm. High near 66. South southeast wind 10 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 58. Breezy, with a south southeast wind 15 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 60%.

Sunday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 75. Breezy, with a south wind 18 to 23 mph, with gusts as high as 32 mph.

Sunday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 58. South wind 10 to 14 mph, with gusts as high as 24 mph.

Monday: A slight chance of showers after 1pm. Mostly sunny, with a high near 81. Breezy, with a south wind 9 to 14 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 31 mph.

Monday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 52. South wind 6 to 15 mph, with gusts as high as 25 mph.

Tuesday: A chance of showers and thunderstorms. Partly sunny, with a high near 70. West southwest wind 6 to 16 mph, with gusts as high as 23 mph.

Tuesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 41. North northwest wind 10 to 14 mph becoming east northeast in the evening. Winds could gust as high as 20 mph.

Wednesday: A chance of showers. Partly sunny, with a high near 61. West wind 10 to 13 mph, with gusts as high as 20 mph.

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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