Forecast Details for San Francisco International Airport, CA

Recent Locations: San Francisco International Airport, CA  
Tonight: Rain likely, mainly before 10pm. Mostly cloudy, with a low around 54. Southeast wind 6 to 11 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Monday: A 30 percent chance of rain, mainly after 5pm. Mostly cloudy, with a high near 64. Light and variable wind becoming south 5 to 9 mph in the morning. New precipitation amounts of less than a tenth of an inch possible.
Monday Night: Rain, mainly after 10pm. Low around 52. South wind 16 to 18 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, mainly before 10am, then a chance of showers and thunderstorms after 10am. High near 59. West wind 14 to 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. West northwest wind 11 to 18 mph.
Christmas Day: Mostly sunny, with a high near 56.
Wednesday Night: A 30 percent chance of rain after 10pm. Mostly cloudy, with a low around 48.
Thursday: Rain likely, mainly before 4pm. Mostly cloudy, with a high near 60.
Thursday Night: Rain likely, mainly after 10pm. Mostly cloudy, with a low around 51.
Friday: Rain likely. Mostly cloudy, with a high near 60.
Friday Night: Rain likely. Cloudy, with a low around 54.
Saturday: Rain likely. Cloudy, with a high near 62.
Saturday Night: Rain likely. Mostly cloudy, with a low around 54.
Sunday: Rain likely. Mostly 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 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

Weather Topic: What is Condensation?

Home - Education - Precipitation - Condensation

Condensation Next Topic: Contrails

Condensation is the process which creates clouds, and therefore it is a crucial process in the water cycle. Condensation is the change of matter from a state of gas into a state of liquid, and it happens because water molecules release heat into the atmosphere and become organized into a more closely packed structure, what we might see as water droplets.

Water is always present in the air around us as a vapor, but it's too small for us to see. When water undergoes the process of condensation it becomes organized into visible water droplets. You've probably seen condensation happen before on the surface of a cold drink!

Next Topic: Contrails