Flood Statement
Issued by NWS San Francisco Bay Area, CA

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000
WGUS86 KMTR 211245
FLSMTR

Flood Advisory
National Weather Service San Francisco CA
445 AM PST SAT JAN 21 2017

CAC069-085-222345-
/O.CON.KMTR.FA.Y.0023.000000T0000Z-170122T2345Z/
/00000.N.DR.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Santa Clara CA-San Benito CA-
445 AM PST SAT JAN 21 2017

...THE FLOOD ADVISORY FOR A DAM FLOODGATE RELEASE REMAINS IN EFFECT
UNTIL 345 PM PST SUNDAY FOR SOUTHEASTERN SANTA CLARA AND NORTHWESTERN
SAN BENITO COUNTIES...

* Local Water District and County Emergency Management personnel
  have indicated that limited portions of the spillway structure for
  Pacheco Lake have been compromised from prior storm activity and
  spillway releases this winter. Specifically, there is concern that
  renewed spillway releases anticipated in response to forecast
  rainfall through the remainder of this weekend could cause
  additional erosion of the spillway structure, which could lead to
  excessive sediment and/or runoff to enter Pacheco Creek
  downstream. Excessive runoff and sediment could cause or increase
  flooding downstream.

* NWS Monterey is forecasting an additional 1-2" of rainfall this
  weekend in the Pacheco Creek watershed that feeds the reservoir.
  Development of post-frontal convective thunderstorms over the
  watershed could increase local precipitation totals over the
  weekend.  Rainfall this weekend will likely be accompanied by
  increased releases over the spillway, but it is currently not
  expected that additional releases would pose additional risk to
  the spillway or downstream areas.

* Engineers from the local Water District as well as California
  Division of Safety of Dams and California Department of Water
  Resources engineers are on-site conducting inspections and
  assessing the level of risk posed by current and expected
  conditions. County Emergency Managers are aware of the situation
  and are taking appropriate action and following necessary
  protocols.

* There is no expectation at this time that a dam breach or failure
  would occur. The dam itself is not compromised; it is only the
  spillway structure that is under investigation.

* Should the situation worsen and elevate the threat to human life
  and property, either prior to or during storm activity this
  weekend, a Flash Flood Warning will be issued for affected areas.
  Stay tuned to your wireless emergency alerts via cellular phone,
  Emergency Alert System interruptions on local radio and television
  stations, NOAA Weather Radio, Twitter (@NWSBayArea), Facebook
  (NWSBayArea), and other local news and notification services
  should a Flash Flood Warning be necessary.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3710 12127 3704 12127 3697 12133 3687 12136
      3687 12145 3689 12150 3690 12157 3696 12154
      3699 12149 3699 12144 3697 12141 3709 12131

$$

RGass



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