Forecast Details for Pomona, CA

Recent Locations: Thousand Oaks, CA Fort Lauderdale, FL Pomona, CA

Current Alerts for Pomona, CA: High Surf Advisory

Tonight: Patchy fog after 4am. Otherwise, increasing clouds, with a low around 50. West southwest wind around 5 mph becoming calm after midnight.

Saturday: Patchy fog before 10am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 77. Calm wind becoming west around 5 mph in the afternoon.

Saturday Night: Clear, with a low around 52. Northeast wind around 5 mph.

Sunday: Sunny, with a high near 81. North wind around 10 mph becoming west in the afternoon. Winds could gust as high as 15 mph.

Sunday Night: Clear, with a low around 52. Calm wind.

Monday: Mostly sunny, with a high near 76.

Monday Night: A 10 percent chance of rain after 4am. Mostly cloudy, with a low around 53.

Tuesday: A chance of rain, mainly after 10am. Mostly cloudy, with a high near 65.

Tuesday Night: A chance of rain, mainly before 10pm. Mostly cloudy, with a low around 48.

Wednesday: A chance of rain after 10am. Mostly cloudy, with a high near 67.

Wednesday Night: A slight chance of rain. Partly cloudy, with a low around 46.

Thursday: A slight chance of rain. Mostly sunny, with a high near 71.

Thursday Night: A slight chance of rain. Partly cloudy, with a low around 48.

Friday: A slight chance of rain. Mostly sunny, with a high near 69.

Want more detail? Get the Complete 7 Day and Night Detailed Forecast!

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).

National Weather Forecast--Current

The Current National Weather Forecast and National Weather Map are shown below.

National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

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.

Weather Topic: What are Contrails?

Home - Education - Cloud Types - Contrails

Next Topic: Cumulonimbus Clouds

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Cumulonimbus Clouds

Weather Topic: What are Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle