Forecast Details for Portland, TX

Recent Locations: Camden, SC Pretty Prairie, KS Portland, TX

Overnight: Mostly cloudy, with a low around 72. South southeast wind around 17 mph, with gusts as high as 24 mph.

Friday: Mostly cloudy, with a high near 80. Heat index values as high as 86. Southeast wind 14 to 22 mph, with gusts as high as 29 mph.

Friday Night: A 20 percent chance of showers between 11pm and 1am. Mostly cloudy, with a low around 72. South southeast wind 14 to 21 mph, with gusts as high as 29 mph.

Saturday: A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 80. South southeast wind 11 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 40%.

Saturday Night: Showers and possibly a thunderstorm. Low around 61. East southeast wind 10 to 14 mph becoming north northeast after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 80%.

Sunday: Showers and possibly a thunderstorm. High near 69. North northeast wind around 16 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.

Sunday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 58. North northeast wind 13 to 16 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

Monday: A 50 percent chance of showers. Cloudy, with a high near 66. North northeast wind 14 to 16 mph, with gusts as high as 21 mph.

Monday Night: Mostly cloudy, with a low around 56. North northeast wind 8 to 10 mph.

Tuesday: Partly sunny, with a high near 72.

Tuesday Night: Mostly cloudy, with a low around 62.

Wednesday: Partly sunny, with a high near 75.

Wednesday Night: Mostly cloudy, with a low around 67.

Thursday: Partly sunny, with a high near 77.

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Current U.S. National Radar--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 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

Weather Topic: What is Sleet?

Home - Education - Precipitation - Sleet

Sleet Next Topic: Snow

Sleet is a form of precipitation in which small ice pellets are the primary components. These ice pellets are smaller and more translucent than hailstones, and harder than graupel. Sleet is caused by specific atmospheric conditions and therefore typically doesn't last for extended periods of time.

The condition which leads to sleet formation requires a warmer body of air to be wedged in between two sub-freezing bodies of air. When snow falls through a warmer layer of air it melts, and as it falls through the next sub-freezing body of air it freezes again, forming ice pellets known as sleet. In some cases, water droplets don't have time to freeze before reaching the surface and the result is freezing rain.

Next Topic: Snow