Rivermatics

USGS Streamgage 12120600

Issaquah Creek near Hobart, WA

Issaquah Creek near Hobart, WA is USGS streamgage 12120600 in Washington, monitoring river discharge in hydrologic subbasin 17110012. It sits on the Issaquah Creek, alongside 1 other gauge Rivermatics tracks on the same river. It drains a watershed of about 18 square miles. Discharge records at this site go back to 1985. Typical flow runs near 14.4 cfs in July and 47.6 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.

View live conditions & forecast →

Gauge details

State
Washington
Drainage area
18 sq mi
Gauge elevation
337 ft
Subbasin (HUC-8)
17110012
Coordinates
47.4573, -122.0051
USGS site number
12120600
Records begin
1985-12-14 (41 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Issaquah Creek near Hobart, WA. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.

Forecast daily mean discharge in cubic feet per second, by date
Date Low p10 Expected p50 High p90 Range
10 10.3 10.5
15.7 25.8 56.1
12 16.8 27.6
11 13.2 17.5
10.5 11.7 14
10.1 11.2 12.8
9.8 10.8 12.3
9.6 10.6 11.9
9.5 10.5 11.7
9.3 10.3 11.5
9.3 10.3 11.4
9.6 10.9 13.1
10.3 12.6 17.4
10.1 12.2 16

All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 40 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January 33.3 69 181.3
February 33.1 59.4 141.1
March 32.9 59.8 128.6
April 27.8 47.6 104
May 19.7 31.3 68.7
June 14.3 23.3 64.3
July 9.9 14.4 26
August 8.2 10.8 16.5
September 8.1 10.7 18
October 9.6 15.7 48.1
November 16.8 48.8 150.4
December 26.6 59.8 161.9

All values in cubic feet per second (cfs).

Common questions

When does Issaquah Creek near Hobart, WA normally run highest?
January, on the long-term record. The median daily flow that month is about 69 cfs, against 10.7 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Issaquah Creek near Hobart, WA?
It depends on the month. In January, half of days historically fall near 69 cfs, with the middle 80% of days between 33.3 and 181.3 cfs. The month-by-month table on this page gives the full range.
How long has Issaquah Creek near Hobart, WA been measured?
Discharge records at USGS site 12120600 begin in 1985, about 41 years, covering roughly 9,200 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Issaquah Creek near Hobart, WA?
Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
Where is Issaquah Creek near Hobart, WA?
The gauge sits at 47.4573, -122.0051, in Washington, in hydrologic subbasin 17110012, at an elevation of about 337 feet, draining roughly 18 square miles.
Can I use Issaquah Creek near Hobart, WA data for flood or safety decisions?
No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.

Upstream and downstream on the Issaquah Creek

Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Issaquah Creek in full.

Other gauges in this subbasin