Forecast Details for Saint Marys, PA

Recent Locations: Tifton, GA Santa Barbara, CA Saint Marys, PA

Tonight: Rain likely, mainly after 3am. Areas of fog after 2am. Otherwise, mostly cloudy, with a low around 41. Calm wind. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

Thursday: Rain. Widespread dense fog, mainly before 8am. High near 53. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

Thursday Night: Rain and possibly a thunderstorm before 1am, then rain likely. Low around 46. South wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

Friday: A slight chance of showers. Cloudy, then gradually becoming mostly sunny, with a high near 60. Southwest wind 3 to 7 mph. Chance of precipitation is 20%.

Friday Night: A chance of showers, mainly after 1am. Mostly cloudy, with a low around 50. South wind 3 to 6 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

Saturday: Showers likely, then showers and possibly a thunderstorm after 1pm. High near 68. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Saturday Night: Showers likely before 1am. Mostly cloudy, with a low around 40. Chance of precipitation is 60%.

Sunday: Mostly sunny, with a high near 54.

Sunday Night: Mostly clear, with a low around 38.

Monday: Sunny, with a high near 62.

Monday Night: Partly cloudy, with a low around 48.

Tuesday: A chance of showers. Partly sunny, with a high near 67. Chance of precipitation is 40%.

Tuesday Night: Showers likely. Mostly cloudy, with a low around 56. Chance of precipitation is 60%.

Wednesday: Showers likely. Mostly cloudy, with a high near 69. Chance of precipitation is 70%.

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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