Weather Alert in Massachusetts
High Surf Advisory issued August 22 at 2:21AM EDT until August 23 at 8:00PM EDT by NWS Boston/Norton MA
AREAS AFFECTED: Eastern Essex; Eastern Plymouth
DESCRIPTION: * WHAT...Large breaking waves of 10 to 15 feet on ocean beaches. Some splashover on vulnerable coastal roads around high tide tonight through Friday night. * WHERE...Eastern Essex MA and Eastern Plymouth MA Counties. * WHEN...For the High Surf Advisory, until 8 PM EDT Saturday. For the Coastal Flood Statement, through late tonight. * IMPACTS...Roads remain passable. Shallow pockets of flooding less than one foot deep affect more vulnerable coastal roads along the North Shore from Salem and Gloucester to Newburyport. Rough surf will likely cause some splashover onto coastal roads around the time of high tide. Dangerous swimming and surfing conditions and localized beach erosion.
INSTRUCTION: Do not drive through flooded roadways. Inexperienced swimmers should remain out of the water due to dangerous surf conditions.
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Weather Topic: What are Wall Clouds?
Home - Education - Cloud Types - Wall Clouds
Next Topic: Altocumulus Clouds
A wall cloud forms underneath the base of a cumulonimbus cloud,
and can be a hotbed for deadly tornadoes.
Wall clouds are formed by air flowing into the cumulonimbus clouds, which can
result in the wall cloud descending from the base of the cumulonimbus cloud, or
rising fractus clouds which join to the base of the storm cloud as the wall cloud
takes shape.
Wall clouds can be very large, and in the Northern Hemisphere they generally
form at the southern edge of cumulonimbus clouds.
Next Topic: Altocumulus Clouds
Weather Topic: What are Altostratus Clouds?
Home - Education - Cloud Types - Altostratus Clouds
Next Topic: Cirrocumulus Clouds
Altostratus clouds form at mid to high-level altitudes
(between 2 and 7 km) and are created by a warm, stable air mass which causes
water vapor
to condense as it rise through the atmosphere. Usually altostratus clouds are
featureless sheets characterized by a uniform color.
In some cases, wind punching through the cloud formation may give it a waved
appearance, called altostratus undulatus. Altostratus clouds
are commonly seen with other cloud formations accompanying them.
Next Topic: Cirrocumulus Clouds
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