Forecast Details for Garnavillo, IA

Recent Locations: Golden Eagle, IL Clarksville, MD Garnavillo, IA

Overnight: Mostly cloudy, with a low around 35. Northeast wind around 11 mph.

Wednesday: Partly sunny, with a high near 50. East wind 10 to 15 mph, with gusts as high as 23 mph.

Wednesday Night: Showers, mainly after 10pm. Low around 36. Breezy, with an east wind around 18 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.

Thursday: Showers, with thunderstorms also possible after 10am. High near 65. Breezy, with an east wind 15 to 18 mph becoming south in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

Thursday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly cloudy, with a low around 35. Breezy, with a southwest wind 9 to 18 mph becoming west after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday: Showers likely and possibly a thunderstorm, mainly after 4pm. Partly sunny, with a high near 61. Northwest wind 6 to 11 mph becoming east in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday Night: Showers and possibly a thunderstorm. Low around 39. East wind around 14 mph becoming southwest after midnight. Chance of precipitation is 90%.

Saturday: A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 46. Breezy, with a west wind 14 to 20 mph, with gusts as high as 28 mph.

Saturday Night: Mostly cloudy, with a low around 29. Breezy, with a west wind 18 to 22 mph.

Sunday: Mostly sunny, with a high near 48. Breezy, with a northwest wind 13 to 18 mph, with gusts as high as 26 mph.

Sunday Night: A slight chance of rain and snow showers. Partly cloudy, with a low around 29. Northwest wind 6 to 10 mph becoming southwest after midnight. Chance of precipitation is 20%.

Monday: A 40 percent chance of showers. Mostly sunny, with a high near 52. Southwest wind 6 to 11 mph becoming northwest in the afternoon.

Monday Night: A 30 percent chance of showers. Partly cloudy, with a low around 29. North wind 8 to 10 mph.

Tuesday: Partly sunny, with a high near 47. North wind 8 to 10 mph.

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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