Forecast Details for Scottdale, PA

Recent Locations: Scottdale, PA  
Overnight: Isolated showers before 5am. Mostly cloudy, with a low around 37. West wind around 5 mph. Chance of precipitation is 20%.
Friday: Mostly cloudy through mid morning, then gradual clearing, with a high near 53. West wind 8 to 15 mph.
Friday Night: Mostly clear, with a low around 36. West wind 5 to 9 mph becoming light and variable after midnight.
Saturday: Showers, with thunderstorms also possible after 2pm. High near 60. Southwest wind 5 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night: Showers likely and possibly a thunderstorm before 11pm, then showers likely between 11pm and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 45. Southwest wind 9 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday: A chance of showers. Mostly cloudy, with a high near 60. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night: Showers and possibly a thunderstorm. Low around 48. Chance of precipitation is 90%.
Monday: Showers and possibly a thunderstorm. High near 65. Chance of precipitation is 90%.
Monday Night: Showers and possibly a thunderstorm. Low around 53. Chance of precipitation is 100%.
Tuesday: Showers and possibly a thunderstorm. High near 69. Breezy. Chance of precipitation is 80%.
Tuesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Wednesday: Showers likely. Mostly cloudy, with a high near 50. Breezy. Chance of precipitation is 60%.
Wednesday Night: Scattered rain and snow showers. Mostly cloudy, with a low around 33. Breezy. Chance of precipitation is 40%.
Thursday: Scattered rain and snow showers. Partly sunny, with a high near 48. Breezy. Chance of precipitation is 30%.

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North America Water Vapor (Moisture)

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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