Forecast Details for Saint Marks, FL

Recent Locations: Medina, WA South Charleston, OH Saint Marks, FL

Overnight: A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 76. Calm wind.

Sunday: Showers and thunderstorms. High near 89. Heat index values as high as 102. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Sunday Night: Showers and thunderstorms likely, mainly before 11pm. Mostly cloudy, with a low around 75. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.

Monday: Showers and thunderstorms. High near 90. Heat index values as high as 101. East southeast wind around 5 mph becoming south in the afternoon. Chance of precipitation is 80%.

Monday Night: Showers and thunderstorms, mainly before 8pm. Low around 76. Calm wind. Chance of precipitation is 80%.

Tuesday: Showers and thunderstorms. High near 92. Chance of precipitation is 90%.

Tuesday Night: Showers and thunderstorms, mainly before 8pm. Low around 76. 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. Low around 74. Chance of precipitation is 80%.

Friday: Showers and thunderstorms likely. Mostly sunny, with a high near 91. Chance of precipitation is 70%.

Friday Night: Showers and thunderstorms likely. Partly cloudy, with a low around 75. Chance of precipitation is 60%.

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

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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