Forecast Details for Johnstown, PA

Recent Locations: Doylesburg, PA Secretary, MD Johnstown, PA

Current Alerts for Johnstown, PA: Flood Watch

Overnight: Showers. Patchy fog before 3am, then patchy fog after 5am. Low around 41. Southeast wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Friday: Showers likely, mainly before 8am. Patchy fog between 8am and 9am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 60. Southeast wind 9 to 13 mph becoming west in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Friday Night: A slight chance of rain showers and sleet before 10pm, then a slight chance of rain showers, snow showers, and sleet between 10pm and 1am. Mostly cloudy, with a low around 33. West wind around 10 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.

Saturday: Partly sunny, with a high near 44. West wind 6 to 10 mph, with gusts as high as 23 mph.

Saturday Night: A chance of rain and snow showers between 1am and 4am, then a chance of snow showers after 4am. Mostly cloudy, with a low around 31. Calm wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

Sunday: Snow showers. High near 37. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

Sunday Night: Snow showers, mainly before 1am. Low around 26. Chance of precipitation is 80%.

Monday: A chance of snow showers. Mostly cloudy, with a high near 34. Chance of precipitation is 50%.

Monday Night: Mostly cloudy, with a low around 18.

Tuesday: Partly sunny, with a high near 31.

Tuesday Night: Mostly cloudy, with a low around 21.

Wednesday: A chance of rain and snow showers. Mostly cloudy, with a high near 43. Chance of precipitation is 50%.

Wednesday Night: Showers likely. Mostly cloudy, with a low around 32. Chance of precipitation is 60%.

Thursday: A chance of showers. Mostly cloudy, with a high near 42. Chance of precipitation is 40%.

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North America Water Vapor (Moisture)

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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

Weather Topic: What are Hole Punch Clouds?

Home - Education - Cloud Types - Hole Punch Clouds

Hole Punch Clouds Next Topic: Mammatus Clouds

A hole punch cloud is an unusual occurrence when a disk-shaped hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.

When part of the cloud forms ice crystals, water droplets in the surrounding area of the cloud evaporate. The effect of this process produces a large elliptical gap in the cloud. The hole punch cloud formation is rare, but it is not specific to any geographic area.

Other names which have been used to describe this phenomena include fallstreak hole, skypunch, and cloud hole.

Next Topic: Mammatus Clouds