Forecast Details for Grants Pass, OR

Recent Locations: Lone Rock, IA Rehoboth, MA Grants Pass, OR

This Afternoon: Mostly sunny, with a high near 62. Calm wind.

Tonight: A 30 percent chance of rain, mainly after 5am. Patchy fog. Otherwise, increasing clouds, with a low around 44. Calm wind.

Saturday: Rain likely before 10am, then showers, mainly after 1pm. Patchy dense fog before 10am. High near 56. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Saturday Night: Showers, mainly before 10pm. Patchy fog. Low around 48. Calm wind. Chance of precipitation is 80%.

Sunday: Showers likely, mainly after 10am. Areas of fog before 1pm. Otherwise, mostly cloudy, with a high near 57. Calm wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

Sunday Night: A 50 percent chance of showers, mainly before 4am. Patchy fog after 7pm. Otherwise, mostly cloudy, with a low around 46.

Monday: A 20 percent chance of showers before 10am. Patchy fog before 11am. Otherwise, partly sunny, with a high near 59.

Monday Night: Areas of fog after 10pm. Otherwise, mostly clear, with a low around 41.

Tuesday: A slight chance of rain after 4pm. Areas of fog before 10am. Otherwise, partly sunny, with a high near 60.

Tuesday Night: Rain, mainly after 10pm. Mostly cloudy, with a low around 44.

Wednesday: Rain. Mostly cloudy, with a high near 53.

Wednesday Night: A chance of rain. Patchy fog. Snow level 3800 feet. Otherwise, mostly cloudy, with a low around 40.

Thursday: A slight chance of rain. Patchy fog. Snow level 3400 feet rising to 4100 feet in the afternoon. Otherwise, partly sunny, with a high near 55.

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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 Precipitation?

Home - Education - Precipitation - Precipitation

Next Topic: Rain

Precipitation can refer to many different forms of water that may fall from clouds. Precipitation occurs after a cloud has become saturated to the point where its water particles are more dense than the air below the cloud.

In most cases, precipitation will reach the ground, but it is not uncommon for precipitation to evaporate before it reaches the earth's surface. When precipitation evaporates before it contacts the ground it is called Virga. Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog and mist are not considered precipitation because the water vapor which constitutes them isn't dense enough to fall to the ground.

Next Topic: Rain

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