Forecast Details for Mertztown, PA

Recent Locations: Mertztown, PA  
Overnight: Rain likely, mainly before 5am. Patchy fog. Otherwise, cloudy, with a low around 44. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday: A chance of rain. Patchy fog before 11am. Otherwise, cloudy, with a high near 50. North wind 5 to 10 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night: A slight chance of rain before 10pm. Cloudy during the early evening, then gradual clearing, with a low around 35. Northwest wind 10 to 15 mph. Chance of precipitation is 20%.
Friday: Sunny, with a high near 52. Breezy, with a northwest wind 10 to 20 mph, with gusts as high as 35 mph.
Friday Night: Mostly clear, with a low around 34. Northwest wind 10 to 15 mph.
Saturday: A chance of showers after 2pm. Mostly sunny, with a high near 56. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night: A chance of showers before 8pm. Mostly cloudy, with a low around 41. Chance of precipitation is 30%.
Sunday: Partly sunny, with a high near 59.
Sunday Night: A chance of rain after 2am. Mostly cloudy, with a low around 40. Chance of precipitation is 40%.
Monday: A chance of rain. Mostly cloudy, with a high near 51. Chance of precipitation is 50%.
Monday Night: Rain likely. Mostly cloudy, with a low around 42. Chance of precipitation is 70%.
Tuesday: Rain. High near 53. Chance of precipitation is 80%.
Tuesday Night: Rain likely. Mostly cloudy, with a low around 41. Chance of precipitation is 60%.
Wednesday: A chance of rain. Mostly cloudy, with a high near 51. Breezy. Chance of precipitation is 40%.

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

Want to Receive our Free Daily Forecast Emails in your inbox by 5 a.m.?
There are no ads! Learn More
We respect your privacy and will not share or sell your email with anyone.

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

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

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 are Fractus Clouds?

Home - Education - Cloud Types - Fractus Clouds

Fractus Clouds Next Topic: Freezing Rain

A fractus cloud (scud) is a fragmented, tattered cloud which has likely been sheared off of another cloud. They are accessory clouds, meaning they develop from parent clouds, and are named in a way which describes the original cloud which contained them.

Fractus clouds which have originated from cumulus clouds are referred to as cumulus fractus, while fractus clouds which have originated from stratus clouds are referred to as stratus fractus. Under certain conditions a fractus cloud might merge with another cloud, or develop into a cumulus cloud, but usually a fractus cloud seen by itself will dissipate rapidly.

They are often observed on the leading and trailing edges of storm clouds, and are a display of wind activity.

Next Topic: Freezing Rain

Weather Topic: What is Graupel?

Home - Education - Precipitation - Graupel

Graupel Next Topic: Hail

Graupel is a form of precipitation that is created by atmospheric conditions which cause supercooled water droplets to contact snow crystals and freeze to their surface.

Sometimes known as soft hail or snow pellets, graupel is delicate and easily destroyed by touch. Whereas hail usually falls during severe weather, graupel doesn't require such conditions to form, and can form in mild precipitation similar to situations which produce snowfall.

Next Topic: Hail