Weather Alert in California
Winter Weather Advisory issued February 17 at 3:00PM PST until February 18 at 4:00PM PST by NWS Eureka CA
AREAS AFFECTED: Coastal Del Norte; Northern Humboldt Coast
DESCRIPTION: ...PERIODS OF RAIN AND SNOW SHOWERS WILL CONTINUE THROUGH THURSDAY MORNING... .Rain, snow and small hail showers are expected to diminish tonight and Wednesday with another round of low snow, rain and small hail Wednesday night evening through early Thursday morning. * WHAT...Widespread small hail showers are occurring, resulting in ice accumulation and extremely slippery driving conditions. Conditions may rapidly change from rain to hail. Snow levels may briefly drop to 500 feet overnight. * WHERE...Del Norte and Northern Humboldt Coast. * WHEN...Until 4 PM PST Wednesday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous due to small hail. Plan on slippery road conditions. The hazardous conditions will impact the Tuesday evening and Wednesday morning commutes.
INSTRUCTION: Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. Dark clouds ahead may indicate showers containing small hail. Slow down and allow extra time if driving.
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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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