Local forecast by
"City, St" or Zip Code |
|
Search by city or zip code. Press enter or select the go button to submit request
|
|
The following Public Information Statement is an announcement for changes to the
Cannonsville and Neversink Reservoir flood stages on the National Weather Service (NWS)
Advanced Hydrologic Prediction Services (AHPS)
web site.
On Friday December 29, 2006, the flood stages posted on the National Weather Service (NWS) Binghamton`s
Advanced Hydrologic Prediction Services (AHPS)
for Cannonsville
and Neversink reservoirs will change. These new reservoir flood stages will provide a
better indication when minor flooding is developing downstream of the New York City water supply
reservoirs at
Cannonsville
and
Neversink.
At Cannonsville,
the reservoir begins spilling at an elevation of 1150.0 feet above mean sea level (msl). the present
Advanced Hydrologic Prediction Services (AHPS)
flood stage is 1152.0 ft msl. At 1152.0 ft msl,
the discharge over the spillway into the West Branch Delaware is 2200 cubic feet per second (cfs).
The new
AHPS
flood stage will become 1153.0 ft msl. This new flood stage is a discharge of 4200 cfs
into the West Branch Delaware below the dam. This discharge does not cause flooding, but it is
significant, especially when there is local runoff from heavy rain or snowmelt occurring below the
reservoir.
At Neversink,
the reservoir begins spilling at an elevation of 1440.0 feet mean sea level (msl). The present
Advanced Hydrologic Prediction Services (AHPS)
flood stage is 1441.0 ft msl. at 1441.0 ft msl, the
discharge over the spillway into the Neversink River is 1800 cubic feet per second (cfs). The new
AHPS
flood stage will become 1441.5 ft msl. This new flood stage is a discharge of 3400 cfs into the
Neversink River below the dam. This discharge does not cause flooding, but it is significant,
especially when there is local runoff from heavy rain or snowmelt occurring below the reservoir.
At
Pepacton Reservoir, the
Advanced Hydrologic Prediction Services (AHPS)
flood stage will not change. The reservoir begins spilling at 1280.0 feet mean sea level
(msl) elevation. The present AHPS
flood stage is 1281.0 feet msl. At 1281.0 ft, the discharge over the spillway into the
East Branch Delaware is 2500 cubic feet per second (cfs). When
Pepacton Reservoir
reaches 1281.1 feet or 3000 cfs, Island Road in Shinhopple begins to flood, therefore no change
is needed to the AHPS flood stage at Pepacton reservoir.
For further information about these flood stage changes contact, John Chiaramonte, Service Hydrologist, at john.chiaramonte@noaa.gov or 607-770-9531 extension 234. Your questions and comments are appreciated.
|
|
weather.gov 
