Thursday, October 15, 2009

NWS Issues Special Weather Statement for Oregon

The National Weather Service issued a special weather statement today for Northern Oregon and Southern Washington. Heavy rain is expected over the next 48 hours, bringing between 1 and 5 inches depending upon location.

Rivers are not expected to flood, but heavy rains in the coastal range often cause mudslides and localized flooding of streams. We recommend the following:

  • Make sure your emergency kit is ready and you have extra food and water, especially if you are in a remote location and can be stranded by flooding or slides
  • Pay attention to nearby hills and streams in the event of a mudslide or flood
  • If you do drive in the heavy rain, drive slowly and avoid standing water - pools of dirty water are usually much deeper then they appear.
  • If you have to go out on foot, do not ever attempt to cross running flood waters or mud slides, they are very dangerous and can wash away anyone.

    Statement as of 2:29 PM PDT on October 15, 2009

    ... Heavy rain expected Friday night and Saturday...

    An unusually wet early season system is expected to dump
    several inches of rain over the area early this weekend. The bulk
    of the rain will fall from late Friday afternoon through Saturday
    as the system taps into a tropical air mass. Models are in
    agreement on bringing the front onshore and then stalling it...
    although details on where the heaviest rain will fall are still
    evolving. As the front stalls the system will usher in a warm and
    moist air mass and consequently wring it out over northwest
    Oregon and southwest Washington. Rainfall accumulations are
    expected to be 2 to 5 inches in the Coast Range... 1 to 2 inches
    northern portions of Willamette Valley... 2 to 4 inches in the
    South Washington and north Oregon Cascades... and around an inch

    Since this system is coming early in the year when rivers are near
    their Summer lows... river flooding should not be much of a
    concern. However... local areas may see higher than expected
    accumulations and therefore local flooding of small streams
    remains a possibility. Remember to maintain a higher awareness
    level and keep informed on this developing scenario.

    Monitor NOAA Weather Radio or weather.Gov/Portland for the latest
    information... forecasts... and warnings.
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