Forecast Details for Lancaster, PA

Recent Locations: Lancaster, PA

Tonight: Partly cloudy, with a low around 60. Southwest wind 5 to 7 mph.

Monday: Sunny, with a high near 86. Calm wind becoming west 5 to 7 mph in the morning.

Monday Night: Mostly clear, with a low around 62. South wind 6 to 8 mph.

Tuesday: A chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 86. Southeast wind 5 to 7 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tuesday Night: A chance of showers and thunderstorms before midnight, then a chance of showers between midnight and 3am, then a slight chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 61. West wind 5 to 8 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Wednesday: A slight chance of showers and thunderstorms before 9am, then a chance of showers between 9am and 3pm, then a chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 77. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Wednesday Night: A chance of showers before 9pm. Partly cloudy, with a low around 55. Chance of precipitation is 30%.

Thursday: Mostly sunny, with a high near 77.

Thursday Night: Mostly clear, with a low around 54.

Friday: Partly sunny, with a high near 78.

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

Saturday: A chance of showers. Mostly cloudy, with a high near 76. Chance of precipitation is 50%.

Saturday Night: A chance of showers. Mostly cloudy, with a low around 58. Chance of precipitation is 50%.

Sunday: A chance of showers. Partly sunny, with a high near 74. Chance of precipitation is 30%.

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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 Altostratus Clouds?

Home - Education - Cloud Types - Altostratus Clouds

Next Topic: Cirrocumulus Clouds

Altostratus clouds form at mid to high-level altitudes (between 2 and 7 km) and are created by a warm, stable air mass which causes water vapor to condense as it rise through the atmosphere. Usually altostratus clouds are featureless sheets characterized by a uniform color.

In some cases, wind punching through the cloud formation may give it a waved appearance, called altostratus undulatus. Altostratus clouds are commonly seen with other cloud formations accompanying them.

Next Topic: Cirrocumulus Clouds

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