Forecast Details for San Francisco, CA

Recent Locations: San Francisco, CA  
Current Alerts for San Francisco, CA: Coastal Flood Warning High Surf Advisory
High Surf Warning
This Afternoon: A 10 percent chance of rain after 4pm. Mostly cloudy, with a high near 64. West wind around 6 mph becoming south.
Tonight: Rain likely before 3am, then a slight chance of rain after 4am. Mostly cloudy, with a low around 56. South wind 3 to 7 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday: A 10 percent chance of rain after 4pm. Mostly cloudy, with a high near 64. Calm wind becoming south 5 to 7 mph in the morning.
Monday Night: Rain, mainly after 10pm. Low around 53. South wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Tuesday: Showers and possibly a thunderstorm before 10am, then a chance of showers and thunderstorms after 10am. High near 60. West wind 9 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night: Mostly clear, with a low around 46.
Christmas Day: Mostly sunny, with a high near 57.
Wednesday Night: Rain, mainly after 4am. Mostly cloudy, with a low around 50.
Thursday: Rain. Mostly cloudy, with a high near 60.
Thursday Night: Rain likely. Mostly cloudy, with a low around 52.
Friday: Rain likely. Mostly cloudy, with a high near 60.
Friday Night: Rain. Cloudy, with a low around 55.
Saturday: Rain likely. Cloudy, with a high near 62.

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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

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 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