Weather Alert in Massachusetts
Coastal Flood Advisory issued August 21 at 1:03PM EDT until August 22 at 10:00PM EDT by NWS Boston/Norton MA
AREAS AFFECTED: Southern Bristol; Washington; Newport
DESCRIPTION: * WHAT...Large breaking waves of 10 to 15 feet. Flooding of up to one foot deep on vulnerable coastal roads and some debris on roadways around high tide Friday morning and Friday evening. * WHERE...Massachusetts and Rhode Island South Coast. * WHEN...For the High Surf Advisory, until 8 PM EDT Saturday. For the Coastal Flood Advisory, for high tides Friday morning and Friday evening. * IMPACTS...Flooding up to one foot deep occurs along the most vulnerable shoreline locales in Newport, Portsmouth and Middletown. This includes flooding at parking lots near beaches in Newport, and a portion of Hazard Road. Shallow flooding also occurs on several streets in the Common Fence Point area. Dangerous swimming and surfing conditions and significant beach erosion.
INSTRUCTION: Do not drive around barricades or through water of unknown depth during high tide. Take the necessary actions to protect flood- prone property. Many ocean beaches are closed. Stay out out of the water due to dangerous surf conditions. Only view surf at a safe distance, not from jetties or piers.
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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
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
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