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

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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 Stratocumulus Clouds?

Home - Education - Cloud Types - Stratocumulus Clouds

Stratocumulus Clouds Next Topic: Stratus Clouds

Stratocumulus clouds are similar to altocumulus clouds in their fluffy appearance, but have a slightly darker shade due to their additional mass.

A good way to distinguish the two cloud types is to hold your hand out and measure the size of an individual cloud; if it is the size of your thumb it is generally an altocumulus cloud, if it is the size of your hand it is generally a stratocumulus cloud.

It is uncommon for stratocumulus clouds to produce precipitation, but if they do it is usually a light rain or snow.

Next Topic: Stratus Clouds

Weather Topic: What are Wall Clouds?

Home - Education - Cloud Types - Wall Clouds

Wall Clouds Next Topic: Altocumulus Clouds

A wall cloud forms underneath the base of a cumulonimbus cloud, and can be a hotbed for deadly tornadoes.

Wall clouds are formed by air flowing into the cumulonimbus clouds, which can result in the wall cloud descending from the base of the cumulonimbus cloud, or rising fractus clouds which join to the base of the storm cloud as the wall cloud takes shape.

Wall clouds can be very large, and in the Northern Hemisphere they generally form at the southern edge of cumulonimbus clouds.

Next Topic: Altocumulus Clouds