Weather Alert in New York
Flood Watch issued March 9 at 1:52PM EDT until March 12 at 2:00PM EDT by NWS Burlington VT
AREAS AFFECTED: Northern St. Lawrence; Northern Franklin; Eastern Clinton; Southeastern St. Lawrence; Southern Franklin; Western Clinton; Western Essex; Eastern Essex; Southwestern St. Lawrence; Grand Isle; Western Franklin; Orleans; Essex; Western Chittenden; Lamoille; Caledonia; Washington; Western Addison; Orange; Western Rutland; Eastern Franklin; Eastern Chittenden; Eastern Addison; Eastern Rutland; Western Windsor; Eastern Windsor
DESCRIPTION: Warm temperatures may melt snowpack and increase river flows. * WHAT...Flooding caused by a combination of rain, snowmelt, and ice jams is possible. * WHERE...All of northern New York and northern and central Vermont. * WHEN...Through Thursday afternoon. * IMPACTS...Excessive runoff from snowmelt and rainfall will cause sharp river rises, likely resulting in river ice break up. Ice jams will be possible, along with rapid onset flooding. Flooding of rivers, creeks, streams, and other low-lying and flood-prone locations will be possible and creeks and streams may rise out of their banks. * ADDITIONAL DETAILS... - Mild temperatures will lead to rapid rises on area rivers through early this week. This will be followed by widespread rain Wednesday into Thursday. Rising rivers will cause river ice to break up and flow, potentially resulting in ice jams and associated flooding. As rain moves in Wednesday, the threat will turn more toward open water flooding for those waterways that have lost their ice. Any open water flooding will likely persist through Thursday. - http://www.weather.gov/safety/flood
INSTRUCTION: You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
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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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