Forecast Details for Mertztown, PA

Recent Locations: Mertztown, PA  
Overnight: Patchy frost after 5am. Otherwise, partly cloudy, with a low around 37. Calm wind becoming south around 5 mph.
Saturday: Scattered showers, mainly after 5pm. Increasing clouds, with a high near 60. South wind 5 to 10 mph. Chance of precipitation is 30%.
Saturday Night: Isolated showers. Mostly cloudy, with a low around 46. South wind 5 to 10 mph. Chance of precipitation is 20%.
Sunday: A slight chance of showers between 2pm and 5pm, then a slight chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 78. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
Sunday Night: Partly cloudy, with a low around 57. Southwest wind around 5 mph.
Monday: Mostly sunny, with a high near 85.
Monday Night: Partly cloudy, with a low around 59.
Tuesday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 79. Chance of precipitation is 40%.
Tuesday Night: A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 58. Chance of precipitation is 30%.
Wednesday: Mostly sunny, with a high near 78.
Wednesday Night: Partly cloudy, with a low around 56.
Thursday: Mostly sunny, with a high near 75.
Thursday Night: A chance of showers. Mostly cloudy, with a low around 56. Chance of precipitation is 30%.
Friday: A chance of showers. Mostly sunny, with a high near 73. Chance of precipitation is 30%.

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Current U.S. National Radar--Current

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Current U.S. National Radar

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Today's National Weather Map

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North America Water Vapor (Moisture)

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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

Weather Topic: What are Wall Clouds?

Home - Education - Cloud Types - Wall Clouds

Wall Clouds Next Topic: Altocumulus Clouds

A wall cloud forms underneath the base of a cumulonimbus cloud, and can be a hotbed for deadly tornadoes.

Wall clouds are formed by air flowing into the cumulonimbus clouds, which can result in the wall cloud descending from the base of the cumulonimbus cloud, or rising fractus clouds which join to the base of the storm cloud as the wall cloud takes shape.

Wall clouds can be very large, and in the Northern Hemisphere they generally form at the southern edge of cumulonimbus clouds.

Next Topic: Altocumulus Clouds