Forecast Details for Port Allegany, PA

Recent Locations: Tipton, MI Kearsarge, NH Port Allegany, PA

Current Alerts for Port Allegany, PA: Winter Weather Advisory

Today: Mostly sunny, with a high near 28. Wind chill values as low as -5. Northwest wind 6 to 9 mph, with gusts as high as 20 mph.

Tonight: Snow, mainly before 4am. Low around 20. Light south wind increasing to 5 to 9 mph in the evening. Winds could gust as high as 22 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

Wednesday: Snow showers, mainly before 1pm. High near 39. West wind 8 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

Wednesday Night: Mostly cloudy, with a low around 17. West wind 5 to 7 mph becoming calm after midnight. Winds could gust as high as 20 mph.

Thursday: A chance of snow showers. Partly sunny, with a high near 35. Calm wind becoming west around 5 mph. Chance of precipitation is 40%.

Thursday Night: A slight chance of snow showers before 1am. Partly cloudy, with a low around 15. Chance of precipitation is 20%.

Friday: Sunny, with a high near 43.

Friday Night: Partly cloudy, with a low around 27.

Saturday: Mostly sunny, with a high near 48.

Saturday Night: A chance of snow showers after 1am. Mostly cloudy, with a low around 19. Chance of precipitation is 30%.

Sunday: Partly sunny, with a high near 29.

Sunday Night: A chance of snow showers. Mostly cloudy, with a low around 10. Chance of precipitation is 30%.

Monday: A chance of snow showers. Partly sunny, with a high near 28. Chance of precipitation is 40%.

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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