Weather Alert in Arizona
Wind Advisory issued May 11 at 12:35AM PDT until May 12 at 11:00PM PDT by NWS Las Vegas NV
AREAS AFFECTED: Lake Mead National Recreation Area; Lake Mead National Recreation Area
DESCRIPTION: * WHAT...For the Lake Wind Advisory today, South winds 15 to 25 mph with gusts up to 35 mph and 2 to 3 foot waves expected. For the Wind Advisory on Monday, southwest winds 20 to 30 mph with gusts up to 45 mph and 2 to 4 foot waves expected. * WHERE...Lake Mead National Recreation Area. * WHEN...The Lake Wind Advisory is in effect from 8 AM PDT /8 AM MST/ this morning to 8 PM PDT /8 PM MST/ this evening. After a lull in the winds and waves tonight, the Wind Advisory is in effect from 8 AM PDT /8 AM MST/ to 11 PM PDT /11 PM MST/ Monday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Strong winds and rough waves on area lakes will create hazardous conditions for small craft. * ADDITIONAL DETAILS...After a lull in winds and waves Sunday night, gusty winds and choppy waves are expected again on Monday which may lead to additional hazardous boating conditions. Please check the forecast for updates if you have plans on Lake Mead or Lake Mohave on Monday.
INSTRUCTION: Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Secure outdoor objects. Strong winds and rough waves on area lakes will create hazardous conditions for small craft.
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Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - 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
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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