Weather Alert in Idaho
Air Quality Alert issued August 28 at 12:05PM PDT by NWS Spokane WA
AREAS AFFECTED: Lewis, ID; Nez Perce, ID
DESCRIPTION: An Air Quality Alert has been issued by the following agencies: Nez Perce Tribe * WHAT...Air Quality Advisory due to smoke from wildfires. Wildfire smoke may move in and out of the area depending on fire and wind activity; some areas may be more impacted than others. Air quality is currently in the Moderate to Unhealthy for Sensitive Groups categories of the Air Quality Index (AQI). No EPA/NPT burn permits will be approved. For the latest air quality readings head to https://fire.airnow.gov or visit the Idaho Smoke Blog at www.idsmoke.blogspot.com * WHERE...Nez Perce Reservation. * WHEN...Until 1000 AM PDT Tuesday, September 2. * IMPACTS...Those who experience greater health effects from smoke includechildren 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: Those individuals who are sensitive to increased particulate matter or smoke are encouraged to avoid prolonged or strenuous outdoor activity during this advisory. It is also recommended that all other individuals limit prolonged or strenuous activity outdoors. Idaho Smoke Information Hotline: (800)-345-1007
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Weather Topic: What are Cirrus Clouds?
Home - Education - Cloud Types - 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
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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