Forecast Details for San Antonio, TX

Recent Locations: Pilot Point, TX Genoa, CO San Antonio, TX

Today: A 40 percent chance of showers and thunderstorms, mainly before 10am. Mostly cloudy, with a high near 86. East southeast wind 5 to 15 mph, with gusts as high as 20 mph.

Tonight: Increasing clouds, with a low around 71. Southeast wind 10 to 15 mph, with gusts as high as 25 mph.

Friday: Mostly cloudy, with a high near 89. South southeast wind 10 to 15 mph, with gusts as high as 30 mph.

Friday Night: A slight chance of showers, then a chance of showers and thunderstorms after 10pm. Mostly cloudy, with a low around 71. Southeast wind 10 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.

Saturday: Showers likely, then showers and possibly a thunderstorm after 10am. High near 81. South southeast wind 5 to 10 mph becoming north northeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 90%.

Saturday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Cloudy, with a low around 57. North northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

Sunday: A 40 percent chance of showers. Cloudy, with a high near 66. North northeast wind 10 to 15 mph, with gusts as high as 25 mph.

Sunday Night: A 30 percent chance of showers. Cloudy, with a low around 55. North northeast wind 5 to 10 mph.

Monday: A 20 percent chance of showers before 1pm. Mostly cloudy, with a high near 69. North northeast wind 5 to 10 mph.

Monday Night: Partly cloudy, with a low around 52.

Tuesday: Mostly cloudy, with a high near 71.

Tuesday Night: Mostly cloudy, with a low around 55.

Wednesday: Partly sunny, with a high near 77.

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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