Forecast Details for Decatur, AL

Recent Locations: Decatur, AL

Current Alerts for Decatur, AL: Heat Advisory

Overnight: Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 72. Calm wind.

Friday: A 30 percent chance of showers and thunderstorms, mainly after 2pm. Some of the storms could produce heavy rainfall. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 94. Heat index values as high as 100. Calm wind becoming west southwest around 5 mph.

Friday Night: A 10 percent chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 72. Calm wind.

Saturday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 92. Calm wind becoming west northwest around 5 mph. Chance of precipitation is 40%.

Saturday Night: Patchy fog after 3am. Otherwise, partly cloudy, with a low around 73. Calm wind.

Sunday: A slight chance of showers, then showers and thunderstorms likely after 10am. Partly sunny, with a high near 91. Chance of precipitation is 60%.

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

Monday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 91. Chance of precipitation is 80%.

Monday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.

Tuesday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 89. Chance of precipitation is 80%.

Tuesday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.

Wednesday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 90.

Wednesday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.

Thursday: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.

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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