Public Information Statement
Issued by NWS Albany, NY

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NOUS41 KALY 041200
PNSALY

Public Information Statement
National Weather Service Albany NY
800 AM EDT Fri May 4 2018

...Severe Weather Awareness Week Continues...

Today the focus is on flash floods.

Flash flooding is a rapid rise, typically within six hours, of water
 along a stream or in a low lying urban area. During the summer, the
most common cause of flash flooding is downpours associated with
thunderstorms. However, flash floods can also result from dam breaks
or heavy rain from tropical storms. Flash flooding is meant to imply
the threat is urgent.

Eastern New York and western New England are particularly susceptible
to flash floods because of topography. Heavy rain falling on steep
terrain creates an ideal situation as water rapidly moves down steep
hill sides. Sometimes steep hill sides get so water logged that they
slip and mud slides or debris flows occur. Flash flooding presents a
threat to the urban motorist too. Underpasses can fill rapidly with
water. Driving into a flooded underpass can quickly put you in five
or six feet of water.

In 2017, the Village of Hoosick falls in New York was hit by
devastating flash flooding. In 2011, Tropical Storm Irene and
the remnants of Tropical Storm Lee brought widespread flash
flooding to the region.

Flash flooding can be deadly. Never underestimate the power of water.
Half of all flash flood related deaths occur in automobiles. Two feet
of flowing water will cause most cars to float. Flooding hazards are
increased at night when visibility is reduced. The National Weather
Service urges you to respect all barriers that warn of flooded roads.
Turn around, dont drown.

Those with interests along rivers, creeks and streams should remain
alert for flash flooding. Campers are particularly at risk. A
normally placid stream can swell to a 10 foot deep raging river in
less than an hour if thunderstorm downpours inundate an area upstream.
Remember, six inches of flowing water is often enough to knock a
person off their feet. When outdoors, keep alert for, muddy rapidly
rising streams, or a loud roaring sound upstream. If observed, head
for higher ground immediately.

NOAA Weather Radio offers one way to receive immediate relay of flash
flood warnings. Many local television and radio stations also broadcast
weather alerts. Computers and wireless devices can receive warnings.
National weather service flash flood warnings are relayed as wireless
emergency alerts to wireless phones by FEMA.

For more information on Severe Weather Awareness Week, go to our web
site www.weather.gov/albany or visit us on social media @NWSAlbany.

Tomorrow we conclude Severe Weather Awareness Week with a look back
at the key points from this week concerning severe weather.
$$
NWS Albany Staff



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