Forecast Details for Troy, PA

Recent Locations: Cosby, TN Knobel, AR Troy, PA

Overnight: A chance of drizzle, mainly between 2am and 3am. Patchy fog. Otherwise, cloudy, with a low around 46. South wind around 10 mph, with gusts as high as 22 mph.

Friday: A slight chance of drizzle before 11am, then a chance of showers, mainly after 3pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 72. South wind 8 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 57. Southwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 79. Calm wind becoming south 5 to 9 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday Night: Showers and thunderstorms likely, then showers after 11pm. Low around 51. South wind 6 to 8 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday: Showers, mainly before 8am. High near 54. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Sunday Night: Mostly cloudy, with a low around 32.

Monday: Partly sunny, with a high near 49.

Monday Night: Mostly cloudy, with a low around 29.

Tuesday: A chance of snow showers between 8am and 2pm. Partly sunny, with a high near 44. Chance of precipitation is 40%.

Tuesday Night: Mostly clear, with a low around 22.

Wednesday: Sunny, with a high near 51.

Wednesday Night: Mostly clear, with a low around 31.

Thursday: Mostly sunny, with a high near 64.

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Current U.S. National Radar--Current

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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.

Weather Topic: What are Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

Next Topic: Precipitation

Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

Rain Next Topic: Shelf Clouds

Precipitation in the form of water droplets is called rain. Rain generally has a tendency to fall with less intensity over a greater period of time, and when rainfall is more severe it is usually less sustained.

Rain is the most common form of precipitation and happens with greater frequency depending on the season and regional influences. Cities have been shown to have an observable effect on rainfall, due to an effect called the urban heat island. Compared to upwind, monthly rainfall between twenty and forty miles downwind of cities is 30% greater.

Next Topic: Shelf Clouds