Forecast Details for McAllen, TX

Recent Locations: New Goshen, IN DeSoto, TX McAllen, TX

Today: Sunny and hot, with a high near 103. Heat index values as high as 106. Calm wind becoming east southeast around 6 mph in the afternoon.

Tonight: Partly cloudy, with a low around 78. South southeast wind 7 to 10 mph, with gusts as high as 21 mph.

Friday: Mostly sunny and hot, with a high near 101. Heat index values as high as 105. South southeast wind 6 to 10 mph.

Friday Night: Partly cloudy, with a low around 80. Southeast wind 6 to 13 mph, with gusts as high as 22 mph.

Saturday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 102. Southeast wind 6 to 9 mph.

Saturday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 80. East southeast wind 5 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

Sunday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 98. East wind 5 to 8 mph. Chance of precipitation is 70%.

Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 78. East wind 5 to 10 mph becoming light after midnight. Chance of precipitation is 70%.

Monday: Showers and possibly a thunderstorm. High near 94. East northeast wind 5 to 8 mph. Chance of precipitation is 80%.

Monday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Partly cloudy, with a low around 77. East northeast wind 5 to 9 mph becoming light after midnight. Chance of precipitation is 60%.

Tuesday: Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 95. East northeast wind 5 to 8 mph. Chance of precipitation is 60%.

Tuesday Night: A 30 percent chance of showers. Mostly clear, with a low around 76.

Wednesday: A 40 percent chance of showers and thunderstorms. Sunny, with a high near 96.

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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.

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