Weather Alert in Massachusetts
Coastal Flood Advisory issued August 20 at 3:14PM EDT until August 22 at 2:00AM EDT by NWS Boston/Norton MA
AREAS AFFECTED: Dukes; Nantucket
DESCRIPTION: * WHAT...For the High Surf Advisory, large breaking waves of 6 to 20 feet in the surf zone. For the first Coastal Flood Advisory, up to one half foot of inundation above ground level expected in low-lying areas near shorelines and tidal waterways (3.5 to 5.4 feet Mean Lower Low Water). For the second Coastal Flood Advisory, up to one half foot of inundation above ground level expected in low-lying areas near shorelines and tidal waterways (3.4 to 5.1 feet Mean Lower Low Water). * WHERE...Dukes MA and Nantucket MA Counties. * WHEN...For the High Surf Advisory, until 8 PM EDT Saturday. For the first Coastal Flood Advisory, from 10 PM Thursday to 2 AM EDT Friday. For the second Coastal Flood Advisory, from 10 PM Friday to 2 AM EDT Saturday. * IMPACTS...Roads remain passable. Low lying areas and roads near Nantucket Harbor, including Easy Street, may experience pockets of shallow flooding less than one foot deep. Dangerous swimming and surfing conditions and localized beach erosion.
INSTRUCTION: If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. Inexperienced swimmers should remain out of the water due to dangerous surf conditions.
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Weather Topic: What is Freezing Rain?
Home - Education - Precipitation - Freezing Rain
Next Topic: Graupel
Freezing rain is a condition where precipitation which has fallen in the form of
water droplets reaches temperatures which are below freezing and freezes upon
coming into contact
with surface objects. The result of this precipitation is a glaze of ice which
can be damaging to plants and man-made structures. A severe onset of freezing
rain which results in a very thick glaze of ice is known as an ice storm.
Next Topic: Graupel
Weather Topic: What is Hail?
Home - Education - Precipitation - Hail
Next Topic: Hole Punch Clouds
Hail is a form of precipitation which is recognized by large solid balls or
clumps of ice. Hail is created by thunderstorm clouds with strong updrafts of wind.
As the hailstones remain in the updraft, ice is deposited onto them until their
weight becomes heavy enough for them to fall to the earth's surface.
Hail storms can cause significant damage to crops, aircrafts, and man-made structures,
despite the fact that the duration is usually less than ten minutes.
Next Topic: Hole Punch Clouds
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