Forecast Details for Arcata, CA

Recent Locations: Arcata, CA  
Tonight: Areas of drizzle before 11pm. Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 44. Calm wind.
Friday: Patchy fog before 11am. Otherwise, partly sunny, with a high near 61. Calm wind becoming west southwest around 6 mph in the afternoon.
Friday Night: Rain. The rain could be heavy at times. Low around 43. Light and variable wind becoming southwest 5 to 9 mph in the evening. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Saturday: Rain likely before 11am, then a chance of showers and thunderstorms after 11am. Mostly cloudy, with a high near 51. West northwest wind around 7 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night: A 20 percent chance of showers and thunderstorms before 11pm. Mostly cloudy, with a low around 39. North wind 5 to 10 mph.
Sunday: Mostly sunny, with a high near 56. East northeast wind 5 to 8 mph becoming west in the morning.
Sunday Night: Mostly cloudy, with a low around 42.
Monday: A slight chance of rain. Mostly cloudy, with a high near 57.
Monday Night: Mostly cloudy, with a low around 41.
Tuesday: Mostly sunny, with a high near 57.
Tuesday Night: Mostly clear, with a low around 41. Breezy.
Wednesday: Sunny, with a high near 59.
Wednesday Night: Partly cloudy, with a low around 42. Breezy.
Thursday: Sunny, with a high near 64.

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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

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Today's National Weather Map

National Weather Forecast for Tomorrow

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Tomorrows National Weather Map

North America Water Vapor (Moisture)

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North American Water Vapor Map

Weather Topic: What are Altostratus Clouds?

Home - Education - Cloud Types - Altostratus Clouds

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

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