Forecast Details for Port Royal, PA

Recent Locations: Tama, IA Orland, ME Port Royal, PA

Tonight: Increasing clouds, with a low around 32. West wind around 6 mph becoming calm in the evening.

Sunday: Mostly cloudy, with a high near 53. Northeast wind 5 to 13 mph becoming southeast in the afternoon. Winds could gust as high as 26 mph.

Sunday Night: Showers, mainly after 2am. Low around 46. Southeast wind 7 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

Monday: Showers, with thunderstorms also possible after 11am. High near 66. Southeast wind 9 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

Monday Night: Rain and snow showers likely, becoming all snow after 11pm, then gradually ending. Some thunder is also possible. Mostly cloudy, with a low around 23. West wind around 10 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.

Tuesday: Partly sunny, with a high near 31.

Tuesday Night: Partly cloudy, with a low around 19.

Wednesday: Partly sunny, with a high near 37.

Wednesday Night: Mostly cloudy, with a low around 26.

Thursday: Mostly cloudy, with a high near 47.

Thursday Night: Mostly cloudy, with a low around 32.

Friday: Mostly sunny, with a high near 54.

Friday Night: A chance of showers. Mostly cloudy, with a low around 35. Chance of precipitation is 30%.

Saturday: A chance of showers. Partly sunny, with a high near 54. Chance of precipitation is 30%.

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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 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