Forecast Details for Coplay, PA

Recent Locations: Coplay, PA

Overnight: A chance of showers and thunderstorms before 5am. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 72. South wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tuesday: A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 5pm, then a chance of showers and thunderstorms after 5pm. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 87. Southwest wind around 10 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tuesday Night: Showers and possibly a thunderstorm, mainly before 11pm, then a chance of showers and thunderstorms after 11pm. Some of the storms could produce heavy rainfall. Low around 70. West wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday: A slight chance of showers, with thunderstorms also possible after 2pm. Cloudy, then gradually becoming mostly sunny, with a high near 85. West wind around 5 mph. Chance of precipitation is 20%.

Wednesday Night: Mostly clear, with a low around 65. West wind around 5 mph becoming calm.

Thursday: A slight chance of showers and thunderstorms after 2pm. Sunny, with a high near 86. Chance of precipitation is 20%.

Thursday Night: Mostly clear, with a low around 62.

Independence Day: Sunny, with a high near 84.

Friday Night: Mostly clear, with a low around 61.

Saturday: Mostly sunny, with a high near 86.

Saturday Night: Partly cloudy, with a low around 67.

Sunday: Partly sunny, with a high near 91.

Sunday Night: Partly cloudy, with a low around 71.

Monday: A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 40%.

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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

Weather Topic: What is Snow?

Home - Education - Precipitation - Snow

Snow Next Topic: Stratocumulus Clouds

Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake, has unique characteristics, but all of them grow in a hexagonal structure. Snowfall can last for sustained periods of time and result in significant buildup of snow on the ground.

On the earth's surface, snow starts out light and powdery, but as it begins to melt it tends to become more granular, producing small bits of ice which have the consistency of sand. After several cycles of melting and freezing, snow can become very dense and ice-like, commonly known as snow pack.

Next Topic: Stratocumulus Clouds