Forecast Details for Coupon, PA

Recent Locations: Coupon, PA  
Tonight: Mostly clear, with a low around 29. Northwest wind around 17 mph, with gusts as high as 22 mph.
Friday: Sunny, with a high near 46. Windy, with a northwest wind 21 to 26 mph, with gusts as high as 40 mph.
Friday Night: Mostly clear, with a low around 31. Blustery, with a northwest wind 14 to 24 mph, with gusts as high as 30 mph.
Saturday: Showers likely. Mostly cloudy, with a high near 49. West wind 8 to 11 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night: A chance of rain, mainly before 2am. Mostly cloudy, with a low around 42. Breezy, with a west wind 11 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Sunday: Partly sunny, with a high near 54.
Sunday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 39. Chance of precipitation is 70%.
Monday: Showers. High near 48. Chance of precipitation is 80%.
Monday Night: Showers. Low around 41. Chance of precipitation is 90%.
Tuesday: Showers, with thunderstorms also possible after 2pm. High near 52. Chance of precipitation is 80%.
Tuesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 37. Chance of precipitation is 60%.
Wednesday: A chance of rain and snow showers. Partly sunny, with a high near 44. Chance of precipitation is 50%.
Wednesday Night: A chance of snow showers. Mostly cloudy, with a low around 31. Breezy. Chance of precipitation is 40%.
Thursday: Partly sunny, with a high near 42. Breezy.

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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

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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 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

Weather Topic: What are Shelf Clouds?

Home - Education - Cloud Types - Shelf Clouds

Shelf Clouds Next Topic: Sleet

A shelf cloud is similar to a wall cloud, but forms at the front of a storm cloud, instead of at the rear, where wall clouds form.

A shelf cloud is caused by a series of events set into motion by the advancing storm; first, cool air settles along the ground where precipitation has just fallen. As the cool air is brought in, the warmer air is displaced, and rises above it, because it is less dense. When the warmer air reaches the bottom of the storm cloud, it begins to cool again, and the resulting condensation is a visible shelf cloud.

Next Topic: Sleet