Public Information Statement
Issued by NWS Binghamton, NY

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Public Information Statement
National Weather Service Binghamton NY
800 AM EDT Wed Mar 28 2018

...Pennsylvania Flood Awareness Week Continues...
This week has been declared Pennsylvania`s Flood Awareness Week
by the National Weather Service office`s serving Pennsylvania.

The National Weather Service in Binghamton will feature information
about a different flood topic each day this week.

Today`s topic: Flood Hazards

Flooding is a coast-to-coast threat to the United States during
every month of the year. Flooding typically occurs when prolonged
rain occurs over several days, or when intense rain falls over a
short period of time, or when an ice jam causes a river or a stream
to overflow into the surrounding area. Flooding can also result in
the failure of a water controled structure, such as a levee or dam.
The most common form of flooding is rain and snowmelt that
accumulates faster than the soil can absorb it, or the rivers can
carry it away. Approximately seventy-five percent of all
Presidential Disaster declarations are associated with flooding.
More information about these flood hazards can be found on the
NWS flood safety website at:

The following will describe different forms of flooding:

Flash Flooding:
Flash flooding are floods that happen in a flash. This type of
flood generally develops within six hours of the immediate cause.
Causes can include heavy rain, ice jams, levee or dam failures.
Flash floods are rapid rises of streams or creeks which flood
roads, bridges, homes and businesses.

Tropical systems and Inland flooding:
Tropical storms, hurricanes and their remnants can bring
devastating floods well inland. Pennsylvania has a long history of
destructive floods from tropical systems which includes Connie and
Diane in 1955, Agnes in 1972, Eloise in 1975, Ivan in 2004, Irene
and Lee in 2011. These storms producing widespread disasterous
flooding to parts of Pennsylvania. It is also important to remember
than most deaths related to tropical storms and hurricanes come
from flooding inland well away from the coast. So, residents in
northeast Pennsylvania need to pay close attention anytime a
hurricane or tropical storm is approaching.

River flooding:
River flooding occurs when river levels rise and overflow their
banks or the edges of their main channel to inundate areas that
are normally dry. River flooding can be caused by heavy rainfall,
dam failures, rapid snowmelt and ice jams. River flooding is
classified as Minor, Moderate, or Major based on pre-determined
water height thresholds and impacts near the river.

The three stages of river flooding are:
Minor: low-lying areas adjacent to the stream or river; mainly
rural areas, farmland and secondary roadways.

Moderate: Water levels rise high enough to impact homes and
businesses near the river. Some evacuations may be needed.

Major: Extensive rural and/or urban flooding is expected. Usually
with significant water depths and destruction to property in,
and near the floodway.

Understanding the different types of flood hazards and knowing the
actions to take before, during, and after, can help you protect
your life, the lives of your loved ones, pets, and your property.
Prepare now by visiting

David J. Nicosia
Warning Coordination Meteorologist
National Weather Service Binghamton, NY is the U.S. government's official web portal to all federal, state and local government web resources and services.