Forecast Details for Portland, TX

Recent Locations: Reinholds, PA Springboro, OH Portland, TX

Today: Mostly cloudy, then gradually becoming sunny, with a high near 80. Heat index values as high as 85. South southeast wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 28 mph.

Tonight: Increasing clouds, with a low around 72. Southeast wind 17 to 20 mph, with gusts as high as 28 mph.

Thursday: Mostly cloudy, with a high near 80. Heat index values as high as 85. South southeast wind 17 to 20 mph, with gusts as high as 28 mph.

Thursday Night: Mostly cloudy, with a low around 72. South southeast wind 14 to 18 mph, with gusts as high as 25 mph.

Friday: Mostly cloudy, with a high near 80. Southeast wind 14 to 21 mph, with gusts as high as 28 mph.

Friday Night: Mostly cloudy, with a low around 72. Southeast wind 14 to 18 mph, with gusts as high as 25 mph.

Saturday: A 40 percent chance of showers after 1pm. Partly sunny, with a high near 81. South southeast wind 11 to 15 mph, with gusts as high as 20 mph.

Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 61. East wind 14 to 18 mph becoming north northeast after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 70%.

Sunday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Cloudy, with a high near 68. North northeast wind 18 to 22 mph, with gusts as high as 29 mph. Chance of precipitation is 60%.

Sunday Night: A chance of showers, with thunderstorms also possible after 1am. Cloudy, with a low around 56. Chance of precipitation is 40%.

Monday: A 30 percent chance of showers. Mostly cloudy, with a high near 66.

Monday Night: Mostly cloudy, with a low around 57.

Tuesday: Mostly cloudy, with a high near 71.

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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

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

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 Mammatus Clouds?

Home - Education - Cloud Types - Mammatus Clouds

Mammatus Clouds Next Topic: Nimbostratus Clouds

A mammatus cloud is a cloud with a unique feature which resembles a web of pouches hanging along the base of the cloud.

In the United States, mammatus clouds tend to form in the warmer months, commonly in the Midwest and eastern regions.

While they usually form at the bottom of a cumulonimbis cloud, they can also form under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds warn that severe weather is close.

Next Topic: Nimbostratus Clouds

Weather Topic: What is Precipitation?

Home - Education - Precipitation - Precipitation

Next Topic: Rain

Precipitation can refer to many different forms of water that may fall from clouds. Precipitation occurs after a cloud has become saturated to the point where its water particles are more dense than the air below the cloud.

In most cases, precipitation will reach the ground, but it is not uncommon for precipitation to evaporate before it reaches the earth's surface. When precipitation evaporates before it contacts the ground it is called Virga. Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog and mist are not considered precipitation because the water vapor which constitutes them isn't dense enough to fall to the ground.

Next Topic: Rain