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 Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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