Weather Alert in Massachusetts
Flood Warning issued May 10 at 10:00PM EDT until May 11 at 2:00PM EDT by NWS Boston/Norton MA
AREAS AFFECTED: Essex, MA; Middlesex, MA
DESCRIPTION: ...The Flood Warning is extended for the following rivers in Massachusetts...Connecticut... Connecticut River At Northampton affecting Hampshire and Hampden Counties. Connecticut River At Thompsonville affecting Hampden and Hartford Counties. ...The Flood Warning continues for the following rivers in Connecticut...Massachusetts...New Hampshire... Connecticut River At Middle Haddam affecting Middlesex County. Connecticut River At Hartford affecting Middlesex and Hartford Counties. Merrimack River At Lowell affecting Middlesex and Essex Counties. Nashua River At East Pepperell affecting Middlesex, Worcester and Hillsborough Counties. For the Connecticut River...including Montague, Northampton, Holyoke Dam, Holyoke, Springfield, Thompsonville, Hartford, Middle Haddam... Minor flooding is forecast. For the Merrimack River...including Lowell, Lawrence, Groveland... Minor flooding is forecast. For the Nashua River...including East Pepperell...Minor flooding is forecast. * WHAT...Minor flooding is forecast. * WHERE...Merrimack River at Lowell. * WHEN...From Sunday morning to early tomorrow afternoon. * IMPACTS...At 52.0 feet, Lowland flooding is likely along the Merrimack River. Most of the impact will be felt by businesses and mills where basement flooding is likely. * ADDITIONAL DETAILS... - At 9:30 PM EDT Saturday the stage was 51.5 feet. - Bankfull stage is 52.0 feet. - Forecast...The river will rise to flood stage tomorrow morning. It will then fall to 51.2 feet Monday morning. It will rise to 51.3 feet Monday evening. It will then fall again and remain below flood stage. - Flood stage is 52.0 feet. - http://www.weather.gov/safety/flood
INSTRUCTION: Caution is urged when walking near riverbanks. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov. The next statement will be issued Sunday morning at 1000 AM EDT.
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Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
Weather Topic: What is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
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