Forecast Details for Theresa, NY

Recent Locations: Theresa, NY

Current Alerts for Theresa, NY: Heat Advisory

Overnight: Clear, with a low around 65. South wind around 5 mph.

Wednesday: Sunny and hot, with a high near 90. Heat index values as high as 96. Southwest wind 5 to 9 mph.

Wednesday Night: A chance of showers and thunderstorms before 2am, then showers likely and possibly a thunderstorm between 2am and 3am, then a chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 70. Light south wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 84. South wind 5 to 11 mph, with gusts as high as 23 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: A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 56. Southwest wind 6 to 11 mph becoming northwest after midnight. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday: Sunny, with a high near 77. North wind around 6 mph.

Friday Night: Mostly clear, with a low around 56. Calm wind.

Saturday: Mostly sunny, with a high near 80. Southwest wind 3 to 7 mph.

Saturday Night: A chance of showers after 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.

Sunday: A chance of showers before 8am. Mostly sunny, with a high near 81. Chance of precipitation is 30%.

Sunday Night: Partly cloudy, with a low around 59.

Monday: Sunny, with a high near 81.

Monday Night: Partly cloudy, with a low around 58.

Tuesday: Mostly sunny, with a high near 84.

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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National Weather Forecast for Tomorrow

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North America Water Vapor (Moisture)

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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

Weather Topic: What is Sleet?

Home - Education - Precipitation - Sleet

Sleet Next Topic: Snow

Sleet is a form of precipitation in which small ice pellets are the primary components. These ice pellets are smaller and more translucent than hailstones, and harder than graupel. Sleet is caused by specific atmospheric conditions and therefore typically doesn't last for extended periods of time.

The condition which leads to sleet formation requires a warmer body of air to be wedged in between two sub-freezing bodies of air. When snow falls through a warmer layer of air it melts, and as it falls through the next sub-freezing body of air it freezes again, forming ice pellets known as sleet. In some cases, water droplets don't have time to freeze before reaching the surface and the result is freezing rain.

Next Topic: Snow