Green River Flooding Information
USGS gage data, map, and
alert phases, and recent high flows
» 2009-2010 Green River Valley preparation information
» River Conditions for Mobile Devices
» King County Flood Alerts
| USGS Gage Name |
Time, Date |
Stage
(feet) |
Flow
(c.f.s.) |
Flow Change
(c.f.s./hr) |
| Green River near Palmer (external link) |
5:00 AM, 2/9/2010 |
5.35 |
464 |
0 |
| Green River near Auburn (external link) |
5:45 AM, 2/9/2010 |
54.40 |
922 |
-7 |
Notes:
This data was requested from USGS at 2/9/2010 6:02:38 AM. King County provides funding to the United States Geological Survey (USGS) to support the operation and maintenance of river and stream gages and related systems. The term "gage" is defined as an instrument for measuring or testing. USGS uses the term "streamgage" to describe their equipment that obtains estimates of the amount of water flowing in streams and rivers. More information about USGS streamgages
|
|
Flood Phase Information
|
|
Phase
|
Green River gage at Auburn (measured or expected flow) *
|
Description
|
Condition
|
|
1
|
5,000 c.f.s.
|
Internal Alert
|
|
|
2
|
7,000 c.f.s.
|
Minor Flooding
|
Lowland flooding in valley upstream of Auburn.
|
|
3
|
9,000 c.f.s.
|
Moderate Flooding
|
Flooding of varied depths occurs in valley upstream of Auburn and
lower Mill Creek basin. SE Green Valley Rd and West Valley Rd may overtop.
|
|
4
|
12,000 c.f.s.
|
Extreme Flooding
|
Conditions at the Howard Hanson
Dam may cause flows on the Green
to greatly exceed channel capacity.
Critical flood control levees may
overtop and may weaken from
saturation. Sudden changes in
flood conditions are possible,
especially in levee-protected areas.
These changes may include rapidly
rising water, widespread
inundation, road closures, and
utility disruptions. Be alert for
evacuation orders and prepare to
respond quickly.
|
|
* Phase is determined by current Auburn gage reading or the expected flow based
on Howard Hanson dam operations information from the U.S. Army Corps of Engineers.
|
Recent High Flow Data:
Green River at Auburn
|
| January 9, 2009 |
11,100 c.f.s. * |
| November 7, 2006 |
12,200 c.f.s. |
| November, 1999 |
9,200 c.f.s. |
| December, 1998 |
9,580 c.f.s. |
| February, 1996 |
12,400 c.f.s. |
| November, 1995 |
11,200 c.f.s. |
| November, 1990 |
11,500 c.f.s. |
*provisional data
National Weather Service: Green River/Howard Hanson Dam Monitoring
(external link)
The U.S. Army Corps of Engineers has provided the following information related to the Howard Hanson Dam:
flood
scenario mapping of the Lower Green River Valley (external link)
Additional USGS gages: (external links)
Additional U.S. Army Corps of Engineers gage data: (external links)
Northwest River Forecast Center data and forecast information
Howard Hanson Reservoir (external link)
More Green-Duwamish River Flood Related Information
Near-real-time photos (webcam) of the Green River near Auburn (external link)
Flood Photo Viewer
» Return to the The Flood Warning System
Page
» Visit King
County Flooding Services
» See other Green River Topics
