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WA - puget sound

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wgus86 ksew 192227
flssew
772 

flood statement
national weather service seattle wa
327 pm pdt sat apr 19 2014

flood bulletin no. 33

wac061-242345-
/o.con.ksew.fa.w.0003.000000t0000z-140424t2345z/
/00000.0.er.000000t0000z.000000t0000z.000000t0000z.oo/
snohomish-
327 pm pdt sat apr 19 2014

...the flood warning remains in effect until 445 pm pdt thursday for
north central snohomish county...

* flood warning for the north fork stillaguamish river east of the   
  state route 530 slide in north central snohomish county...

* until 445 pm pdt april 24.

* flooding continues on the north fork of the stillaguamish river
  upstream of the sr 530 slide due to debris from the state route   
  530 slide partially blocking the river and the resulting pooling   
  of water behind the  debris dam. we will be updating the flood   
  warning on a day to day basis.

* the oso area has received only 0.08 inches of rain in the past 24 
hours ending at 3 pm. but heavy showers are expected to produce 
between 0.75 and 1.5 inches of rain in the slide area through about 
midnight saturday night. at 300 pm pdt saturday...the north fork 
of the stillaguamish river near arlington was at 4.5 feet or 2700 
cfs. the north fork of the stillaguamish near arlington is expected 
to rise overnight...cresting near 6.5 feet or 6012 cfs early sunday 
morning. the north fork of the stillaguamish near oso was at 216.4 
feet...or 1820 cfs. the north fork of the stillaguamish near oso is 
expected to rise...cresting near 218.2 feet or 3500 cfs early monday 
morning. the north fork of the stillaguamish is expected to fall 
sunday through monday. 

* at 300 pm pdt saturday...the pool elevation was not available. due 
to heavy showers tonight...the pool elevation is forecast to rise 
about 2 feet above current values by early sunday afternoon before 
resuming a slow fall sunday night into monday. there continues to be 
a great amount of uncertainty in the forecast pool elevation due in 
part to limited knowledge of how much water the new stream channel 
through the slide debris will be able to convey.


precautionary/preparedness actions...

a flood warning means flooding is occurring or imminent. most flood
related deaths occur in automobiles. do not attempt to cross water
covered bridges...dips...or low water crossings. never try to cross a
flowing stream...even a small one...on foot. to escape rising water
move up to higher ground.


&&

lat...lon 4825 12181 4829 12185 4829 12177 4829 12166
      4824 12165 4826 12174

$$

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