| USGS Gage Name |
Time, Date |
Stage
(feet) |
Flow
(c.f.s.) |
Flow Change
(c.f.s./hr) |
| North Fork Snoqualmie River
(external link) |
9:15 PM, 5/25/2013 |
3.55 |
520 |
-4 |
| Middle Fork Snoqualmie River
(external link) |
9:15 PM, 5/25/2013 |
3.46 |
1180 |
-20 |
| South Fork Snoqualmie River
(external link) |
9:15 PM, 5/25/2013 |
11.10 |
388 |
+4 |
|
Sum of Snoqualmie River Forks |
9:15 PM, 5/25/2013 |
n/a |
2088 |
-20 |
| Snoqualmie River near Snoqualmie
(external link) |
9:30 PM, 5/25/2013 |
5.93 |
2540 |
0 |
| Snoqualmie River near Carnation
(external link) |
9:15 PM, 5/25/2013 |
47.31 |
3440 |
-10 |
| Snoqualmie River at Duvall
(external link) |
9:00 PM, 5/25/2013 |
28.75 |
n/a |
0 (stage, in feet) |
Notes:
This data was requested from USGS at 5/25/2013 9:32:05 PM. The flood phases of the Snoqualmie River are based on the sum of flow for the North, Middle and South forks. The sum of the Forks as of 9:15 PM on 5/25/2013 is 2088.00 c.f.s. (cubic feet per second) based on USGS provisional data. The sum of the forks represents the most recent flows available from three independent gages providing the best available flood warning information. If a gage has an older sampling time than others, its most recent measurement is used in calculating the sum of the forks. c.f.s. = cubic feet per second.
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
|
| Snoqualmie River Flood Phases
|
|
Phase
|
Phase Threshold (sum of the Forks)
|
Description
|
Roads that may overtop and close
|
| 1 |
6,000 c.f.s. |
Internal Alert |
|
| 2 |
12,000 c.f.s. |
Lowland flooding |
Neal Rd, SE Reinig Rd, West Snoqualmie River
Rd NE (Walker Rd) Snoqualmie Meadowbrook Rd, Mill Pond Rd. |
| 3 |
20,000 c.f.s. |
Flooding of varied depths occurs in the
entire Snoqualmie Valley |
Fall City -Carnation Rd, Tolt Hill Rd, NE 124th St. |
| 4 |
38,000 c.f.s. |
Some residential areas may experience dangerous
high velocities and flooding of homes. |
Woodinville-Duvall Rd, SR 203 between Duvall
and Carnation, Moon Valley Rd, South Fork Rd |
| Recent High Flow Data |
| High Flow Event |
Sum of the Forks |
Snoqualmie River near Snoqualmie |
Snoqualmie River
near Carnation |
| January 16-17, 2011 |
34,740 c.f.s. |
37,900 c.f.s. |
51,600 c.f.s. |
59.32 ft |
| January 7-8, 2009 |
54,110 c.f.s. |
60,700 c.f.s. |
82,900 c.f.s. |
62.21 ft |
| November 6-7, 2006 |
53,500 c.f.s. |
55,000 c.f.s. |
71,800 c.f.s. |
61.28 ft |
| February, 1996 |
43,740 c.f.s. |
51,700 c.f.s. |
61,600 c.f.s. |
60.34 ft |
| November, 1995 |
47,960 c.f.s. |
50,200 c.f.s. |
62,400 c.f.s. |
60.30 ft |
| November, 1990 |
48,250 c.f.s. |
78,800 c.f.s. |
65,200 c.f.s. |
60.70 ft |
The U.S. Army Corps of Engineers also provides access to the provisional
gage data:
North
Fork Snoqualmie River (external link)
Middle
Fork Snoqualmie River (external link)
South
Fork Snoqualmie River (external link)
Snoqualmie
River near Snoqualmie (external link)
Snoqualmie
River near Carnation (external link)
Snoqualmie
River at Duvall (external link)
Snohomish County Flood Warning Information (external link), 425-388-5060
More Snoqualmie Valley Flood Documentation
Flood Photo Viewer
Video of the Election Day Flood, November, 2006:
Photos of
phase 4 flood, November, 2006
Aerial photos of
phase 4 flood, December, 1995
Snoqualmie
River Flood Reduction Project 205
Lower
Tolt River Floodplain Restoration
» Return to the The Flood Warning
System Page
» Return to King
County Flooding Services
» See other Snoqualmie Basin Topics
|
