Forecast Details for Hempstead, NY

Recent Locations: Avon, IL Irvine, CA Hempstead, NY

Tonight: Mostly clear, with a low around 8. Wind chill values between -5 and zero. Northwest wind 9 to 11 mph.

Monday: Sunny, with a high near 28. Wind chill values between -5 and 5. Northwest wind 7 to 10 mph.

Monday Night: Mostly cloudy, with a low around 18. Northwest wind 3 to 5 mph.

Tuesday: A slight chance of snow after 1pm, mixing with rain after 4pm. Mostly cloudy, with a high near 36. Wind chill values between 20 and 30. Calm wind becoming south 5 to 7 mph in the afternoon. Chance of precipitation is 20%.

Tuesday Night: A slight chance of rain and snow before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 29. Southwest wind 5 to 7 mph becoming west after midnight. Chance of precipitation is 20%.

Wednesday: Mostly sunny, with a high near 37.

Wednesday Night: Partly cloudy, with a low around 24.

Thursday: Mostly sunny, with a high near 34.

Thursday Night: Partly cloudy, with a low around 20.

Friday: Mostly sunny, with a high near 33.

Friday Night: Mostly clear, with a low around 21.

Saturday: Sunny, with a high near 35.

Saturday Night: Partly cloudy, with a low around 25.

Sunday: A 30 percent chance of rain. Partly sunny, with a high near 40.

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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

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

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 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

Weather Topic: What is Evaporation?

Home - Education - Precipitation - Evaporation

Next Topic: Fog

Evaporation is the process which returns water from the earth back to the atmosphere, and is another crucial process in the water cycle.

Evaporation is the transformation of liquid into gas, and it happens because molecules are excited by the application of energy and turn into vapor. In order for water to evaporate it has to be on the surface of a body of water.

Next Topic: Fog