Forecast Details for McKinney, TX

Recent Locations: McKinney, TX

Overnight: A 30 percent chance of showers. Patchy fog. Otherwise, mostly cloudy, with a low around 60. South southeast wind around 5 mph.

Friday: A chance of showers, with thunderstorms also possible after 7am. Patchy fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 83. Southeast wind around 5 mph. Chance of precipitation is 30%.

Friday Night: A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 66. Southeast wind around 5 mph.

Saturday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 82. East wind 5 to 10 mph becoming south southeast in the morning. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66. South southeast wind 5 to 10 mph.

Sunday: Mostly sunny, with a high near 84. South wind 5 to 15 mph, with gusts as high as 20 mph.

Sunday Night: Mostly cloudy, with a low around 69. South wind 10 to 15 mph, with gusts as high as 20 mph.

Monday: Mostly cloudy, with a high near 85. South wind around 15 mph, with gusts as high as 30 mph.

Monday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 69. South wind around 15 mph, with gusts as high as 20 mph.

Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.

Tuesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 66. Chance of precipitation is 70%.

Wednesday: Showers and possibly a thunderstorm. High near 78. Chance of precipitation is 80%.

Wednesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63.

Thursday: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82.

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North America Water Vapor (Moisture)

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Weather Topic: What are Cirrus Clouds?

Home - Education - Cloud Types - Cirrus Clouds

Next Topic: Condensation

Cirrus clouds are high-level clouds that occur above 20,000 feet and are composed mainly of ice crystals. They are thin and wispy in appearance.

What do they indicate?
They are often the first sign of an approaching storm.

Next Topic: Condensation

Weather Topic: What are Contrails?

Home - Education - Cloud Types - Contrails

Next Topic: Cumulonimbus Clouds

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Cumulonimbus Clouds