Weather Alert in California

Recent Locations: San Francisco, CA  
Current Alerts for San Francisco, CA: Special Weather Statement

Wind Advisory issued March 30 at 10:06PM PDT until April 2 at 2:00AM PDT by NWS San Diego CA

AREAS AFFECTED: Coachella Valley; San Gorgonio Pass Near Banning

DESCRIPTION: * WHAT...West winds 20 to 30 mph with gusts to 60 mph, except locally to 70 mph near San Gorgonio Pass Monday and Tuesday. Most widespread winds will be Tuesday. * WHERE...Coachella Valley and San Gorgonio Pass near Banning. * WHEN...Until 2 AM PDT Wednesday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Reduced visibility in blowing dust in the desrts. * ADDITIONAL DETAILS...Gusty winds will occur at times through Wednesday, especially during the afternoons and nights.

INSTRUCTION: Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.

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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

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