Forecast Details for Grinnell, IA

Recent Locations: Mooers Forks, NY Duchesne, UT Grinnell, IA

Overnight: A 20 percent chance of showers. Mostly cloudy, with a steady temperature around 44. Northeast wind around 14 mph, with gusts as high as 18 mph.

Wednesday: A slight chance of showers before 7am, then a chance of showers after 3pm. Mostly cloudy, with a high near 50. Breezy, with an east wind 16 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

Wednesday Night: Showers before 10pm, then showers and possibly a thunderstorm between 10pm and 4am, then showers after 4am. Low around 39. Breezy, with an east wind 15 to 18 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, with thunderstorms also possible after 7am. High near 66. Windy, with a southeast wind 15 to 23 mph becoming south southwest in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Thursday Night: Partly cloudy, with a low around 37. Breezy, with a west southwest wind 13 to 18 mph becoming northwest 6 to 11 mph after midnight. Winds could gust as high as 28 mph.

Friday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 66. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

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

Saturday: A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 46. Windy.

Saturday Night: Mostly cloudy, with a low around 29. Windy.

Sunday: Sunny, with a high near 51. Breezy.

Sunday Night: Mostly clear, with a low around 31.

Monday: Mostly sunny, with a high near 58.

Monday Night: Partly cloudy, with a low around 30.

Tuesday: Mostly sunny, with a high near 52.

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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National Weather Forecast for Tomorrow

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North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

Weather Topic: What are Cirrostratus Clouds?

Home - Education - Cloud Types - Cirrostratus Clouds

Next Topic: Cirrus Clouds

Cirrostratus clouds are high, thin clouds that form above 20,000 feet and are made mostly of ice crystals. They sometimes look like giant feathers, horse tails, or curls of hair in the sky. These clouds are pushed by the jet stream and can move at high speeds reaching 100 mph.

What do they indicate?
They indicate that a precipitation is likely within 24 hours.

Next Topic: Cirrus Clouds

Weather Topic: What is Condensation?

Home - Education - Precipitation - Condensation

Next Topic: Contrails

Condensation is the process which creates clouds, and therefore it is a crucial process in the water cycle. Condensation is the change of matter from a state of gas into a state of liquid, and it happens because water molecules release heat into the atmosphere and become organized into a more closely packed structure, what we might see as water droplets.

Water is always present in the air around us as a vapor, but it's too small for us to see. When water undergoes the process of condensation it becomes organized into visible water droplets. You've probably seen condensation happen before on the surface of a cold drink!

Next Topic: Contrails