Weather Alert in Idaho

Recent Locations: Moreno Valley, CA   Columbus, NC   Viola, ID  
Current Alerts for Viola, ID: Air Quality Alert

Air Quality Alert issued August 22 at 2:20PM PDT by NWS Spokane WA

AREAS AFFECTED: Latah, ID; Lewis, ID; Nez Perce, ID

DESCRIPTION: An Air Quality Alert has been issued by the following agencies: Idaho Department of Environmental Quality in Lewiston Nez Perce Tribe ERWM Air Quality Program * WHAT...Air Quality Advisory due to smoke from wildfires. Air Quality Index is forecast to be Unhealthy. * WHERE...Latah and Nez Perce Counties, and the Nez Perce Reservation. * WHEN...Until Monday morning August 25th. * IMPACTS...Those who experience health effects from smoke include children under 18, elders, pregnant women, people with asthma or have difficulty breathing, diabetes, heart problems or otherwise compromised health, and people who have high exposure (those who work, exercise, or spend extensive time outdoors).

INSTRUCTION: Under the most severe pollution level, sensitive groups should avoid outdoor exposure and limit indoor activities, and everyone should restrict their outdoor activities. Idaho Department of Health and Welfare https://healthandwelfare.idaho.gov/health-wellness/environmental- health/idaho-wildfire-and-smoke-information Idaho Smoke Information Hotline: 1-800-345-1007 Idaho DEQ Lewiston Regional Office - (208)-799-4370

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Weather Topic: What are Shelf Clouds?

Home - Education - Cloud Types - Shelf Clouds

Shelf Clouds Next Topic: Sleet

A shelf cloud is similar to a wall cloud, but forms at the front of a storm cloud, instead of at the rear, where wall clouds form.

A shelf cloud is caused by a series of events set into motion by the advancing storm; first, cool air settles along the ground where precipitation has just fallen. As the cool air is brought in, the warmer air is displaced, and rises above it, because it is less dense. When the warmer air reaches the bottom of the storm cloud, it begins to cool again, and the resulting condensation is a visible shelf cloud.

Next Topic: Sleet

Weather Topic: What is Snow?

Home - Education - Precipitation - Snow

Snow Next Topic: Stratocumulus Clouds

Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake, has unique characteristics, but all of them grow in a hexagonal structure. Snowfall can last for sustained periods of time and result in significant buildup of snow on the ground.

On the earth's surface, snow starts out light and powdery, but as it begins to melt it tends to become more granular, producing small bits of ice which have the consistency of sand. After several cycles of melting and freezing, snow can become very dense and ice-like, commonly known as snow pack.

Next Topic: Stratocumulus Clouds

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