Forecast Details for Johnstown, PA

Recent Locations: Fairbanks, AK Lexington, IN 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%.

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

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).

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 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