Forecast Details for Saint Marks, FL

Recent Locations: Aydlett, NC Hilliard, OH Saint Marks, FL

This Afternoon: Showers and thunderstorms. Steady temperature around 85. South southwest wind around 10 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight: Showers and thunderstorms likely before 11pm, then showers likely and possibly a thunderstorm between 11pm and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 76. South wind around 5 mph becoming east southeast after midnight. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

Monday: A chance of showers and thunderstorms before 7am, then showers likely and possibly a thunderstorm between 7am and 11am, then showers and thunderstorms likely after 11am. Partly sunny, with a high near 90. Heat index values as high as 101. East southeast wind 5 to 10 mph becoming south in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

Monday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 77. South wind around 5 mph becoming calm in the evening.

Tuesday: Showers likely and possibly a thunderstorm before 2pm, then showers and thunderstorms between 2pm and 5pm, then showers and possibly a thunderstorm after 5pm. High near 92. East southeast wind 5 to 10 mph becoming south southwest in the afternoon. Chance of precipitation is 80%.

Tuesday Night: Showers and thunderstorms before 2am, then a chance of showers between 2am and 5am, then a chance of showers and thunderstorms after 5am. Low around 75. Chance of precipitation is 80%.

Wednesday: Showers and thunderstorms, mainly after 2pm. High near 93. Chance of precipitation is 80%.

Wednesday Night: Showers and thunderstorms, mainly before 8pm. Low around 75. Chance of precipitation is 80%.

Thursday: Showers and thunderstorms, mainly after 2pm. High near 92. Chance of precipitation is 80%.

Thursday Night: Showers and thunderstorms, mainly before 8pm. Low around 74. Chance of precipitation is 80%.

Friday: Showers and thunderstorms. High near 91. Chance of precipitation is 80%.

Friday Night: Showers and thunderstorms. Low around 75. Chance of precipitation is 80%.

Saturday: Showers and thunderstorms likely. Mostly sunny, with a high near 92. Chance of precipitation is 70%.

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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