Forecast Details for Grants Pass, OR

Recent Locations: Oto, IA Russell, MA Grants Pass, OR

Today: Widespread dense fog before 1pm, then patchy dense fog after 4pm. Otherwise, mostly sunny, with a high near 57. Light and variable wind.

Tonight: Patchy dense fog. Otherwise, partly cloudy, with a low around 39. Calm wind.

Friday: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 61. Calm wind.

Friday Night: A 30 percent chance of rain after 4am. Mostly cloudy, with a low around 45. Calm wind.

Saturday: Rain likely, mainly after 10am. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 56. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Saturday Night: Showers likely, mainly before 10pm. Patchy fog. Otherwise, mostly cloudy, with a low around 47. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

Sunday: A chance of showers before 4pm, then a chance of rain after 4pm. Areas of fog before 1pm. Otherwise, partly sunny, with a high near 60. Chance of precipitation is 50%.

Sunday Night: A chance of rain, mainly before 10pm. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 42.

Monday: A slight chance of rain before 10am. Patchy fog before 10am. Otherwise, mostly sunny, with a high near 62.

Monday Night: Patchy fog after 1am. Otherwise, mostly clear, with a low around 41.

Tuesday: Patchy fog. Otherwise, partly sunny, with a high near 64.

Tuesday Night: A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 41.

Wednesday: A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a high near 58.

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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)

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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

Weather Topic: What are Cumulonimbus Clouds?

Home - Education - Cloud Types - Cumulonimbus Clouds

Cumulonimbus Clouds Next Topic: Cumulus Clouds

The final form taken by a growing cumulus cloud is the cumulonimbus cloud, which is very tall and dense. The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although most commonly they stop growing at an altitude of 6 km.

Even small cumulonimbus clouds appear very large in comparison to other cloud types. They can signal the approach of stormy weather, such as thunderstorms or blizzards.

Next Topic: Cumulus Clouds