Forecast Details for Ulster, PA

Recent Locations: Mountain Top, PA Fortuna, MO Ulster, PA

Overnight: Patchy fog after 5am. Otherwise, mostly clear, with a low around 67. Calm wind.

Wednesday: A chance of showers and thunderstorms, mainly after 5pm. Patchy fog before 7am. Otherwise, increasing clouds, with a high near 91. Heat index values as high as 97. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Wednesday Night: Showers and thunderstorms likely before 5am, then a chance of showers. Mostly cloudy, with a low around 69. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Thursday: A chance of showers before 8am, then a chance of showers and thunderstorms between 8am and 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 89. Southwest wind 5 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday Night: Showers and thunderstorms likely before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 64. West wind 3 to 8 mph. Chance of precipitation is 60%.

Friday: Partly sunny, with a high near 78.

Friday Night: Mostly clear, with a low around 55.

Saturday: Mostly sunny, with a high near 84.

Saturday Night: A chance of showers after 8pm. Mostly cloudy, with a low around 64. Chance of precipitation is 50%.

Sunday: A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 50%.

Sunday Night: A chance of thunderstorms. Partly cloudy, with a low around 60. Chance of precipitation is 30%.

Monday: Mostly sunny, with a high near 84.

Monday Night: Partly cloudy, with a low around 61.

Tuesday: A chance of showers. Partly sunny, with a high near 85. Chance of precipitation is 40%.

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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