Forecast Details for San Francisco International Airport, CA

Recent Locations: San Francisco International Airport, CA  
This Afternoon: Rain likely. Cloudy, with a high near 64. South wind 17 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tonight: Rain likely. Cloudy, with a low around 56. South southeast wind 11 to 16 mph, with gusts as high as 33 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday: Rain. High near 64. South southeast wind 15 to 20 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Friday Night: Rain. Low around 51. Breezy, with a southwest wind 16 to 23 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Saturday: Rain likely, mainly before 10am. Partly sunny, with a high near 60. West southwest wind around 10 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 47.
Sunday: Rain likely, mainly after 10am. Mostly cloudy, with a high near 59. Chance of precipitation is 60%.
Sunday Night: Rain likely. Mostly cloudy, with a low around 49.
Monday: Rain. Mostly cloudy, with a high near 60.
Monday Night: Rain. Mostly cloudy, with a low around 49.
Tuesday: Rain likely. Mostly cloudy, with a high near 60.
Tuesday Night: A chance of rain. Mostly cloudy, with a low around 46.
Wednesday: A slight chance of rain. Mostly sunny, with a high near 60.

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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)

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 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

Weather Topic: What are Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

Next Topic: Precipitation