Forecast Details for Phoenix, AZ

Recent Locations: Los Angeles, CA Orlando, FL Phoenix, AZ

Tonight: Mostly cloudy, with a low around 59. Calm wind.

Friday: Showers likely, mainly between 1pm and 3pm. Mostly cloudy, with a high near 73. Calm wind becoming south southeast around 5 mph in the morning. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Friday Night: A 20 percent chance of showers before 11pm. Partly cloudy, with a low around 51. West wind around 5 mph becoming calm in the evening.

Saturday: Sunny, with a high near 74. Calm wind becoming west southwest around 5 mph.

Saturday Night: Partly cloudy, with a low around 52. Calm wind.

Sunday: Partly sunny, with a high near 77. Calm wind becoming east southeast around 5 mph in the afternoon.

Sunday Night: Mostly cloudy, with a low around 54. Southeast wind around 5 mph becoming calm.

Washington's Birthday: Mostly cloudy, with a high near 76. Light and variable wind becoming south southwest 5 to 10 mph in the morning.

Monday Night: Showers likely, mainly after 11pm. Mostly cloudy, with a low around 55. South southwest wind 5 to 10 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

Tuesday: Showers likely. Mostly cloudy, with a high near 70. Southwest wind 5 to 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

Tuesday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 50. South wind around 5 mph.

Wednesday: A 20 percent chance of showers. Mostly sunny, with a high near 67. West southwest wind 5 to 10 mph.

Wednesday Night: Mostly clear, with a low around 45. West wind around 5 mph becoming calm in the evening.

Thursday: Mostly sunny, with a high near 69. Calm wind becoming west southwest around 5 mph in the afternoon.

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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