Forecast Details for Saint Mary, MO

Recent Locations: Saint Mary, MO

Overnight: Areas of dense fog. Otherwise, partly cloudy, with a low around 59. Calm wind.

Saturday: A 20 percent chance of showers and thunderstorms after 4pm. Areas of dense fog before 8am. Otherwise, mostly sunny, with a high near 84. Calm wind becoming southwest 5 to 8 mph in the morning.

Saturday Night: A 50 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 58. Southwest wind 5 to 7 mph becoming northwest after midnight.

Sunday: A 30 percent chance of showers and thunderstorms, mainly after 4pm. Mostly cloudy, with a high near 75. North wind 5 to 8 mph.

Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7pm. Mostly cloudy, with a low around 62. Northeast wind around 6 mph becoming southeast after midnight. Chance of precipitation is 70%.

Monday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 80. Chance of precipitation is 70%.

Monday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 66.

Tuesday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 84. Breezy. Chance of precipitation is 70%.

Tuesday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 65.

Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 85. Breezy. Chance of precipitation is 60%.

Wednesday Night: Showers and thunderstorms likely. Mostly cloudy, with a low around 62. Chance of precipitation is 70%.

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

Thursday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 57.

Friday: Mostly sunny, with a high near 74.

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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 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