Forecast Details for Oskaloosa, IA

Recent Locations: Bethel, DE Bland, VA Oskaloosa, IA

Overnight: A 30 percent chance of showers, mainly between 1am and 5am. Mostly cloudy, with a low around 42. Northeast wind 11 to 14 mph, with gusts as high as 23 mph. New precipitation amounts of less than a tenth of an inch possible.

Wednesday: Showers likely, mainly after 5pm. Cloudy, with a high near 50. Breezy, with an east wind 13 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Wednesday Night: Showers and possibly a thunderstorm. Temperature falling to near 46 by 8pm, then rising to around 52 during the remainder of the night. Breezy, with an east wind 14 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

Thursday: Showers and possibly a thunderstorm before 4pm, then showers likely. High near 70. Windy, with a south southeast wind 14 to 22 mph becoming west southwest in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Thursday Night: Showers likely, mainly before 7pm. Partly cloudy, with a low around 40. Breezy, with a west wind 12 to 17 mph becoming west northwest 6 to 11 mph after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Friday: A chance of rain and thunderstorms, then rain likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 71. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Friday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 37. Breezy. Chance of precipitation is 80%.

Saturday: A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 49. Windy.

Saturday Night: Mostly cloudy, with a low around 30. Windy.

Sunday: Mostly sunny, with a high near 52. Breezy.

Sunday Night: Clear, with a low around 31.

Monday: Sunny, with a high near 62.

Monday Night: Partly cloudy, with a low around 39.

Tuesday: Partly sunny, with a high near 62.

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North America Water Vapor (Moisture)

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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

Weather Topic: What is Snow?

Home - Education - Precipitation - Snow

Snow Next Topic: Stratocumulus Clouds

Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake, has unique characteristics, but all of them grow in a hexagonal structure. Snowfall can last for sustained periods of time and result in significant buildup of snow on the ground.

On the earth's surface, snow starts out light and powdery, but as it begins to melt it tends to become more granular, producing small bits of ice which have the consistency of sand. After several cycles of melting and freezing, snow can become very dense and ice-like, commonly known as snow pack.

Next Topic: Stratocumulus Clouds