Weather Alert in California

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Dense Smoke Advisory issued September 7 at 3:12PM PDT until September 8 at 11:00AM PDT by NWS Reno NV

AREAS AFFECTED: Mono

DESCRIPTION: * WHAT...Dense smoke reducing visibility to 1 mile or less at times. Smoke will also lead to degraded air quality. * WHERE...Mono County. * WHEN...Until 11 AM PDT Monday. * IMPACTS...Hazardous travel due to reduced visibility, especially along US-395 and over southern Mono County. Poor air quality may cause health issues for those with respiratory illnesses. * ADDITIONAL DETAILS...For details on health impacts and recommended precautions, please consult the Great Basin Unified Air Pollution Control District at GBUAPCD.org and AirNow.gov.

INSTRUCTION: Persons with respiratory illnesses should remain indoors to avoid inhaling smoke.

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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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