Forecast Details for Harrisburg, PA

Recent Locations: Thorsby, AL Towaco, NJ Harrisburg, PA

Overnight: A chance of rain, mainly before 5am. Patchy fog. Otherwise, cloudy, with a low around 34. Calm wind. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

Wednesday: A chance of rain, mainly after 9am. Areas of fog before 1pm. Otherwise, cloudy, with a high near 52. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

Wednesday Night: Rain, mainly after 3am. Low around 44. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

Thursday: Rain. Patchy fog between 8am and 10am. High near 54. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Thursday Night: Rain and possibly a thunderstorm. Low around 44. East wind 3 to 5 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Friday: A slight chance of rain. Cloudy, with a high near 53. Chance of precipitation is 20%.

Friday Night: Mostly cloudy, with a low around 46.

Saturday: Rain likely after 1pm. Mostly cloudy, with a high near 70. Chance of precipitation is 60%.

Saturday Night: A chance of rain before 1am. Mostly cloudy, with a low around 49. Chance of precipitation is 50%.

Sunday: Mostly sunny, with a high near 62.

Sunday Night: Partly cloudy, with a low around 46.

Monday: Sunny, with a high near 68.

Monday Night: Mostly clear, with a low around 50.

Tuesday: Mostly sunny, with a high near 74.

Want more detail? Get the Complete 7 Day and Night Detailed Forecast!

Current U.S. National Radar--Current

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National Weather Forecast--Current

The Current National Weather Forecast and National Weather Map are shown below.

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 Cirrostratus Clouds?

Home - Education - Cloud Types - Cirrostratus Clouds

Next Topic: Cirrus Clouds

Cirrostratus clouds are high, thin clouds that form above 20,000 feet and are made mostly of ice crystals. They sometimes look like giant feathers, horse tails, or curls of hair in the sky. These clouds are pushed by the jet stream and can move at high speeds reaching 100 mph.

What do they indicate?
They indicate that a precipitation is likely within 24 hours.

Next Topic: Cirrus Clouds

Weather Topic: What is Condensation?

Home - Education - Precipitation - Condensation

Next Topic: Contrails

Condensation is the process which creates clouds, and therefore it is a crucial process in the water cycle. Condensation is the change of matter from a state of gas into a state of liquid, and it happens because water molecules release heat into the atmosphere and become organized into a more closely packed structure, what we might see as water droplets.

Water is always present in the air around us as a vapor, but it's too small for us to see. When water undergoes the process of condensation it becomes organized into visible water droplets. You've probably seen condensation happen before on the surface of a cold drink!

Next Topic: Contrails