Weather Alert in New York
Flood Watch issued March 12 at 1:47PM EDT until March 12 at 5:00PM EDT by NWS Buffalo NY
AREAS AFFECTED: Jefferson; Lewis
DESCRIPTION: * WHAT...Flooding caused by rain and snowmelt continues to be possible. * WHERE...A portion of central New York, including the following counties, Jefferson and Lewis. * WHEN...Until 5 PM EDT this afternoon. * IMPACTS...Excessive runoff from snowmelt and rainfall may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Ice jams will also be possible in areas where significant ice remains. * ADDITIONAL DETAILS... - Rainfall amounts of three quarters of an inch to an inch and a half were observed over the last 36 hours. Warmer weather over the last few days has resulted in snow melt, with a deep snow pack in place across the Black River basin. This will continue to cause rises on the Black River, Moose River, Independence River, and Beaver River as well as other tributaries. There is a risk of flooding due to high flows or ice jams. - 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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