Forecast Details for Harrisburg, PA

Recent Locations: Harrisburg, PA  
Tonight: Mostly cloudy during the early evening, then gradual clearing, with a low around 35. Northwest wind 7 to 11 mph.
Friday: Sunny, with a high near 55. Northwest wind 8 to 18 mph, with gusts as high as 32 mph.
Friday Night: Clear, with a low around 36. Northwest wind 9 to 13 mph, with gusts as high as 21 mph.
Saturday: A chance of showers. Increasing clouds, with a high near 56. Southwest wind 5 to 8 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night: A slight chance of rain before 2am. Mostly cloudy, with a low around 46. West wind around 7 mph. Chance of precipitation is 20%.
Sunday: Partly sunny, with a high near 63.
Sunday Night: A chance of showers after 2am. Mostly cloudy, with a low around 43. Chance of precipitation is 50%.
Monday: Showers likely, mainly after 8am. Mostly cloudy, with a high near 52. Chance of precipitation is 70%.
Monday Night: Showers. Low around 43. Chance of precipitation is 90%.
Tuesday: Showers likely. Mostly cloudy, with a high near 55. Chance of precipitation is 70%.
Tuesday Night: A chance of showers. Mostly cloudy, with a low around 43. Chance of precipitation is 50%.
Wednesday: A chance of showers. Partly sunny, with a high near 53. Chance of precipitation is 40%.
Wednesday Night: Partly cloudy, with a low around 36.
Thursday: Mostly sunny, with a high near 52. Breezy.

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Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

Current U.S. National Radar

National Weather Forecast--Current

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Today's National Weather Map

National Weather Forecast for Tomorrow

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

Tomorrows National Weather Map

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.

North American Water Vapor Map

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

Weather Topic: What are Stratocumulus Clouds?

Home - Education - Cloud Types - Stratocumulus Clouds

Stratocumulus Clouds Next Topic: Stratus Clouds

Stratocumulus clouds are similar to altocumulus clouds in their fluffy appearance, but have a slightly darker shade due to their additional mass.

A good way to distinguish the two cloud types is to hold your hand out and measure the size of an individual cloud; if it is the size of your thumb it is generally an altocumulus cloud, if it is the size of your hand it is generally a stratocumulus cloud.

It is uncommon for stratocumulus clouds to produce precipitation, but if they do it is usually a light rain or snow.

Next Topic: Stratus Clouds