Rivermatics

USGS Streamgage 11355500

Hat C near Hat Creek, CA

Hat C near Hat Creek, CA is USGS streamgage 11355500 in California, monitoring river discharge in hydrologic subbasin 18020003. It sits on the Hat C, alongside 2 other gauges Rivermatics tracks on the same river. It drains a watershed of about 162 square miles. Discharge records at this site go back to 1926. Typical flow runs near 132 cfs in July and 141.3 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, alongside daily high and low water-temperature forecasts.

View live conditions & forecast →

Gauge details

State
California
Drainage area
162 sq mi
Gauge elevation
4,294 ft
Subbasin (HUC-8)
18020003
Coordinates
40.68911, -121.42281
USGS site number
11355500
Records begin
1926-07-07 (100 years)
Rivermatics forecast
14-day flow outlook + water temperature

14-day flow forecast

Based on observations through for Hat C near Hat Creek, CA. 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
117 119 120
115 119 122
112 118 122
110 118 123
108 117 123
107 117 123
105 117 124
104 117 124
102 116 124
99.7 116 125
98.5 116 125
98.6 116 126
98.9 116 126
99.2 116 126

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 100 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 90.3 128.4 164.1
February 88.1 130.5 164.8
March 96.8 129.5 167.1
April 104.9 141.3 179.4
May 124.8 174.5 239.2
June 116.7 167.9 265.3
July 89.8 132 193.8
August 86.1 124.9 161.9
September 84.4 121 157.7
October 88.1 123.5 163.7
November 88.3 127.1 169.1
December 89 130.2 162.5

All values in cubic feet per second (cfs).

Common questions

When does Hat C near Hat Creek, CA normally run highest?
May, on the long-term record. The median daily flow that month is about 174.5 cfs, against 121 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 Hat C near Hat Creek, CA?
It depends on the month. In January, half of days historically fall near 128.4 cfs, with the middle 80% of days between 90.3 and 164.1 cfs. The month-by-month table on this page gives the full range.
How long has Hat C near Hat Creek, CA been measured?
Discharge records at USGS site 11355500 begin in 1926, about 100 years, covering roughly 3,591 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Hat C near Hat Creek, CA?
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. A companion model forecasts each day's water-temperature high and low. 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 Hat C near Hat Creek, CA?
The gauge sits at 40.68911, -121.42281, in California, in hydrologic subbasin 18020003, at an elevation of about 4,294 feet, draining roughly 162 square miles.
Can I use Hat C near Hat Creek, CA 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 Hat C

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

Other gauges in this subbasin