Weather Alert in California

Recent Locations: Fremont, CA  

High Wind Warning issued May 11 at 10:28AM PDT until May 12 at 11:00PM PDT by NWS Las Vegas NV

AREAS AFFECTED: Eastern Sierra Slopes of Inyo County; Owens Valley

DESCRIPTION: * WHAT...Southwest winds 35 to 45 mph with gusts up to 70 mph. * WHERE...Eastern Sierra Slopes and Owens Valley. * WHEN...Until 11 PM PDT Monday. * IMPACTS...Damaging winds will blow down trees and power lines. Widespread power outages are expected. Travel will be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...3:00 pm PDT to 11:00 pm PDT today is the most likely window for gusty downslope winds to impact Highway 395 in the northern half of the Owens Valley (north of Lone Pine). South of Lone Pine, CA the window for downslope winds will be from 3:00 pm PDT this afternoon through 5:00 am PDT Monday morning.

INSTRUCTION: Watch for falling debris, tree limbs and downed power lines or poles. Use extra caution if you must drive.

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Weather Topic: What are Cirrus Clouds?

Home - Education - Cloud Types - Cirrus Clouds

Cirrus Clouds Next Topic: Condensation

Cirrus clouds are high-level clouds that occur above 20,000 feet and are composed mainly of ice crystals. They are thin and wispy in appearance.

What do they indicate?
They are often the first sign of an approaching storm.

Next Topic: Condensation

Weather Topic: What are Contrails?

Home - Education - Cloud Types - Contrails

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

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