Weather Alert in Massachusetts
Severe Thunderstorm Warning issued September 6 at 3:31PM EDT until September 6 at 4:30PM EDT by NWS Boston/Norton MA
AREAS AFFECTED: Franklin, MA; Hampden, MA; Hampshire, MA; Worcester, MA
DESCRIPTION: SVRBOX The National Weather Service in Boston/Norton has issued a * Severe Thunderstorm Warning for... Worcester County in central Massachusetts... East central Hampshire County in western Massachusetts... Southeastern Franklin County in western Massachusetts... Southeastern Hampden County in western Massachusetts... * Until 430 PM EDT. * At 330 PM EDT, a severe thunderstorm was located over West Brookfield, or 18 miles west of Worcester, moving east at 35 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to trees and power lines. * Locations impacted include... Worcester, Leominster, Shrewsbury, Milford, Hudson, Westborough, Grafton, Holden, Webster, Southbridge, Auburn, Northbridge, Northborough, Oxford, Clinton, Uxbridge, Millbury, Charlton, Palmer, and Spencer.
INSTRUCTION: For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways.
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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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