Forecast Details for Kittanning, PA

Recent Locations: Kittanning, PA

This Afternoon: Showers and thunderstorms, mainly before 5pm, then showers and possibly a thunderstorm after 5pm. High near 86. Southwest wind around 6 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tonight: Showers and thunderstorms, mainly before 3am. Low around 70. South wind 3 to 5 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 5pm. High near 87. Southwest wind 6 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Thursday Night: Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 64. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday: Partly sunny, with a high near 83. Light and variable wind.

Friday Night: A slight chance of showers after 2am. Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 62. Chance of precipitation is 20%.

Saturday: A chance of showers between 8am and 2pm, then showers and thunderstorms likely after 2pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 86. Chance of precipitation is 70%.

Saturday Night: Showers and thunderstorms likely before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 70%.

Sunday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 84. Chance of precipitation is 60%.

Sunday Night: Showers likely and possibly a thunderstorm before 8pm. Patchy fog after midnight. Otherwise, partly cloudy, with a low around 61. Chance of precipitation is 60%.

Monday: Patchy fog. Otherwise, mostly sunny, with a high near 85.

Monday Night: Partly cloudy, with a low around 63.

Tuesday: A chance of showers. Partly sunny, with a high near 88. Chance of precipitation is 50%.

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North America Water Vapor (Moisture)

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Weather Topic: What are Contrails?

Home - Education - Cloud Types - Contrails

Next Topic: Cumulonimbus Clouds

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Cumulonimbus Clouds

Weather Topic: What are Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle