Forecast Details for Decatur, AL

Recent Locations: Decatur, AL

Today: Areas of fog before 8am. Otherwise, sunny, with a high near 94. Heat index values as high as 102. Calm wind becoming west southwest around 5 mph.

Tonight: Mostly clear, with a low around 74. Calm wind.

Wednesday: A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 96. Heat index values as high as 103. Calm wind becoming south southwest around 5 mph.

Wednesday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 76. Calm wind.

Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 94. South wind around 5 mph. Chance of precipitation is 50%.

Thursday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 74. Chance of precipitation is 20%.

Friday: Showers and thunderstorms likely, mainly after 1pm. Mostly sunny, with a high near 93. Chance of precipitation is 60%.

Friday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 74.

Saturday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 92.

Saturday Night: Partly cloudy, with a low around 74.

Sunday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.

Sunday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.

Monday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.

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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 is Evaporation?

Home - Education - Precipitation - Evaporation

Next Topic: Fog

Evaporation is the process which returns water from the earth back to the atmosphere, and is another crucial process in the water cycle.

Evaporation is the transformation of liquid into gas, and it happens because molecules are excited by the application of energy and turn into vapor. In order for water to evaporate it has to be on the surface of a body of water.

Next Topic: Fog

Weather Topic: What are Fractus Clouds?

Home - Education - Cloud Types - Fractus Clouds

Fractus Clouds Next Topic: Freezing Rain

A fractus cloud (scud) is a fragmented, tattered cloud which has likely been sheared off of another cloud. They are accessory clouds, meaning they develop from parent clouds, and are named in a way which describes the original cloud which contained them.

Fractus clouds which have originated from cumulus clouds are referred to as cumulus fractus, while fractus clouds which have originated from stratus clouds are referred to as stratus fractus. Under certain conditions a fractus cloud might merge with another cloud, or develop into a cumulus cloud, but usually a fractus cloud seen by itself will dissipate rapidly.

They are often observed on the leading and trailing edges of storm clouds, and are a display of wind activity.

Next Topic: Freezing Rain