Weather Alert in Idaho
Hydrologic Outlook issued March 11 at 10:22AM MDT by NWS Missoula MT
AREAS AFFECTED: Clearwater, ID; Idaho, ID
DESCRIPTION: ESFMSO Idaho and Clearwater Counties A prolonged Atmospheric River is expected to impact north central Idaho through Saturday, bringing moderate to heavy precipitation. Snow levels will be ranging from 3000 to 6000 feet during the event. The most likely rainfall scenario forecasts 1.25 to 2.75 inches for the valleys of Idaho and Clearwater counties in north central Idaho, and 3.00 to 5.00 inches expected in the mountains, but precipitation will be mainly in the form of snow of 2 to 6 feet. The rainfall will increase the risk of rock and landslides across north central Idaho. Continue to monitor the latest forecast updates as this system approaches.
INSTRUCTION: N/A
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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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