Weather Alert in North Carolina
High Surf Advisory issued August 20 at 7:37PM EDT until August 23 at 12:00AM EDT by NWS Newport/Morehead City NC
AREAS AFFECTED: Northern Outer Banks; Ocracoke Island; Hatteras Island
DESCRIPTION: * WHAT...For the Beach Hazards Statement, dangerous rip currents in the surf zone. For the High Surf Advisory, large breaking waves of 10 to 20+ feet in the surf zone. * WHERE...The beaches from Duck to Hatteras Island. * WHEN...For the Beach Hazards Statement, through Thursday evening. For the High Surf Advisory, until midnight EDT Friday night. * IMPACTS...Extreme beach and coastal damage is likely along the oceanside, resulting in a significant threat to life and property. Large dangerous waves will likely inundate and destroy protective dune structures. Severe flooding will likely extend inland from the waterfront causing flooding of many homes and businesses with some structural damage possible. Numerous roads will likely be impassable under several feet of water and vehicles will likely be submerged. Actions will need to be taken to protect life and property. Extremely dangerous swimming and surfing conditions expected, as well as the wave action resulting in significant beach erosion. * ADDITIONAL DETAILS...A Storm Surge Warning remains in effect for the Outer Banks. This is expected to be a prolonged duration event, with the potential for portions of NC-12 and secondary roads along the Outer Banks, in particular on Hatteras and Ocracoke Islands, to be impassable and/or inaccessible through the end of the week due to significant wave run up.
INSTRUCTION: Inexperienced swimmers should remain out of the water due to dangerous surf conditions. Life-threatening rip currents. If caught in a rip current, remain calm. Swim in a direction following the shoreline. If tired, float or tread water until out of the rip current. If unable to escape, face the shore and call or wave for help.
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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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