Forecast Details for Pasadena, CA

Recent Locations: Grand Rapids, MI   Billings, MT   Pasadena, CA  
Current Alerts for Pasadena, CA: High Surf Advisory
Tonight: Mostly cloudy, with a low around 49. East southeast wind around 5 mph.
Friday: Partly sunny, with a high near 71. Calm wind becoming south around 5 mph in the afternoon.
Friday Night: Mostly clear, with a low around 46. Calm wind.
Saturday: Sunny, with a high near 76. Calm wind becoming west southwest around 5 mph in the afternoon.
Saturday Night: Clear, with a low around 48. North northeast wind around 5 mph.
Sunday: Sunny, with a high near 81.
Sunday Night: Clear, with a low around 54.
Monday: Mostly sunny, with a high near 77.
Monday Night: A slight chance of rain after 4am. Mostly cloudy, with a low around 52.
Tuesday: A chance of rain, mainly after 10am. Mostly cloudy, with a high near 69.
Tuesday Night: A chance of rain. Mostly cloudy, with a low around 47.
Wednesday: A chance of rain. Partly sunny, with a high near 64.
Wednesday Night: A chance of rain. Mostly cloudy, with a low around 44.
Thursday: A slight chance of rain. Mostly sunny, with a high near 69.

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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 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

Weather Topic: What are Cumulonimbus Clouds?

Home - Education - Cloud Types - Cumulonimbus Clouds

Cumulonimbus Clouds Next Topic: Cumulus Clouds

The final form taken by a growing cumulus cloud is the cumulonimbus cloud, which is very tall and dense. The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although most commonly they stop growing at an altitude of 6 km.

Even small cumulonimbus clouds appear very large in comparison to other cloud types. They can signal the approach of stormy weather, such as thunderstorms or blizzards.

Next Topic: Cumulus Clouds

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