Forecast Details for San Antonio, TX

Recent Locations: San Antonio, TX

Today: Mostly cloudy, then gradually becoming sunny and hot, with a high near 99. Heat index values as high as 105. Southeast wind 5 to 10 mph.

Tonight: Partly cloudy, with a low around 77. East southeast wind 5 to 10 mph.

Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Partly sunny, with a high near 95. Heat index values as high as 102. East southeast wind 5 to 10 mph. Chance of precipitation is 30%.

Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Increasing clouds, with a low around 77. Southeast wind 5 to 10 mph, with gusts as high as 20 mph.

Wednesday: Showers and thunderstorms likely, mainly after 1pm. Mostly cloudy, with a high near 91. Southeast wind 5 to 10 mph. Chance of precipitation is 60%.

Wednesday Night: Showers and thunderstorms likely, mainly after 1am. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 75. Southeast wind 5 to 10 mph. Chance of precipitation is 60%.

Thursday: Showers and thunderstorms likely. Mostly cloudy, with a high near 90. South southeast wind 5 to 10 mph. Chance of precipitation is 60%.

Thursday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 75. Southeast wind 5 to 10 mph.

Friday: A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 91. South southeast wind 5 to 10 mph.

Friday Night: Mostly cloudy, with a low around 76.

Saturday: A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 93.

Saturday Night: Mostly cloudy, with a low around 77.

Sunday: A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 94.

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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 Hail?

Home - Education - Precipitation - Hail

Hail Next Topic: Hole Punch Clouds

Hail is a form of precipitation which is recognized by large solid balls or clumps of ice. Hail is created by thunderstorm clouds with strong updrafts of wind. As the hailstones remain in the updraft, ice is deposited onto them until their weight becomes heavy enough for them to fall to the earth's surface.

Hail storms can cause significant damage to crops, aircrafts, and man-made structures, despite the fact that the duration is usually less than ten minutes.

Next Topic: Hole Punch Clouds

Weather Topic: What are Mammatus Clouds?

Home - Education - Cloud Types - Mammatus Clouds

Mammatus Clouds Next Topic: Nimbostratus Clouds

A mammatus cloud is a cloud with a unique feature which resembles a web of pouches hanging along the base of the cloud.

In the United States, mammatus clouds tend to form in the warmer months, commonly in the Midwest and eastern regions.

While they usually form at the bottom of a cumulonimbis cloud, they can also form under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds warn that severe weather is close.

Next Topic: Nimbostratus Clouds