Forecast Details for Saint Marys, PA

Recent Locations: Saint Marys, PA  
Current Alerts for Saint Marys, PA: Freeze Warning
Today: Mostly sunny, with a high near 57. Northeast wind around 6 mph.
Tonight: Mostly clear, with a low around 30. East wind around 5 mph.
Friday: Sunny, with a high near 61. Southeast wind 6 to 10 mph.
Friday Night: A slight chance of showers after 3am. Partly cloudy, with a low around 40. Southeast wind 10 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Saturday: Showers likely, mainly between 8am and 2pm. Mostly cloudy, with a high near 56. Southeast wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night: A chance of showers, mainly before 8pm. Mostly cloudy, with a low around 48. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Sunday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 75. Chance of precipitation is 40%.
Sunday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 54. Chance of precipitation is 30%.
Monday: A chance of showers after 2pm. Mostly sunny, with a high near 80. Chance of precipitation is 30%.
Monday Night: A chance of showers. Partly cloudy, with a low around 57. Chance of precipitation is 40%.
Tuesday: Showers likely. Mostly cloudy, with a high near 72. Chance of precipitation is 70%.
Tuesday Night: Mostly cloudy, with a low around 48.
Wednesday: A chance of showers. Mostly sunny, with a high near 71. Chance of precipitation is 30%.

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Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

Current U.S. National Radar

National Weather Forecast--Current

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Today's National Weather Map

National Weather Forecast for Tomorrow

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

Tomorrows National Weather Map

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.

North American Water Vapor Map

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

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