Forecast Details for Vernonia, OR

Recent Locations: Vernonia, OR  
Tonight: Showers, mainly after 11pm. Snow level 2500 feet. Low around 33. West wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday: Showers and possibly a thunderstorm, mainly before 2pm, then a chance of showers and thunderstorms after 2pm. Snow level 2300 feet rising to 3400 feet in the afternoon. High near 51. Calm wind becoming northwest around 6 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 11pm. Patchy frost after 1am. Otherwise, partly cloudy, with a low around 33. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Wednesday: Areas of frost before 9am. Otherwise, mostly sunny, with a high near 58. Calm wind becoming west southwest around 5 mph in the afternoon.
Wednesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 38. West southwest wind around 5 mph becoming calm in the evening. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday: A chance of rain before 11am, then a chance of showers after 11am. Partly sunny, with a high near 60. Chance of precipitation is 40%.
Thursday Night: Partly cloudy, with a low around 36.
Friday: A chance of showers, mainly after 11am. Partly sunny, with a high near 65.
Friday Night: Showers likely. Mostly cloudy, with a low around 43.
Saturday: Showers likely. Mostly cloudy, with a high near 62.
Saturday Night: A chance of showers. Mostly cloudy, with a low around 41.
Sunday: A chance of showers. Mostly cloudy, with a high near 59.
Sunday Night: Showers likely. Mostly cloudy, with a low around 42.
Monday: Showers. Mostly cloudy, with a high near 56.

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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.

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Weather Topic: What are Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

Next Topic: Precipitation

Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

Rain Next Topic: Shelf Clouds

Precipitation in the form of water droplets is called rain. Rain generally has a tendency to fall with less intensity over a greater period of time, and when rainfall is more severe it is usually less sustained.

Rain is the most common form of precipitation and happens with greater frequency depending on the season and regional influences. Cities have been shown to have an observable effect on rainfall, due to an effect called the urban heat island. Compared to upwind, monthly rainfall between twenty and forty miles downwind of cities is 30% greater.

Next Topic: Shelf Clouds