2025-12-17T18:00:00-07:00
The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 AM to 6 PM MST Wednesday. * AFFECTED AREA...Fire Weather Zone 241. * TIMING...From 11 AM to 6 PM MST Wednesday. * WINDS...West 15 to 30 mph, with gusts to 45 mph. * RELATIVE HUMIDITY...20 to 25 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire.
Summary
Total streamflow across the
Mattole River
was last observed at
297
cfs, and is expected to yield approximately
588
acre-ft of water today; about 93%
of normal.
Average streamflow for this time of year is
320 cfs,
with recent peaks last observed
on
2023-03-14 when daily discharge volume was observed at
38,900 cfs.
Maximum discharge along the river is currently at the
Mattole R Nr Petrolia Ca
reporting a streamflow rate of 264 cfs.
This is also the highest stage along the Mattole River, with a gauge stage of
12.15 ft at this location.
This river is monitored from 2 different streamgauging stations along the Mattole River, the highest being situated at an altitude of 599 ft, the
Mattole R Nr Ettersburg Ca.
River Details
| Last Updated | 2025-12-16 |
| Discharge Volume | 588 ACRE-FT |
| Streamflow |
296.7 cfs
+14.3 cfs (+5.06%) |
| Percent of Normal | 92.73% |
| Maximum |
38,900.0 cfs
2023-03-14 |
| Seasonal Avg | cfs |
River Streamflow Levels
| Streamgauge | Streamflow | Gauge Stage | 24hr Change (%) | % Normal | Minimum (cfs) | Maximum (cfs) | Air Temp | Elevation |
|---|---|---|---|---|---|---|---|---|
|
Mattole R Nr Ettersburg Ca
USGS 11468900 |
33 cfs | 9.2 ft | 7.57 | |||||
|
Mattole R Nr Petrolia Ca
USGS 11469000 |
264 cfs | 12.15 ft | 4.76 |
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile
Historically, the Mattole Valley was home to the indigenous Mattole people who lived along the river for thousands of years. The river is unique in that it is one of the few undammed rivers left in California, allowing for a relatively natural flow regime. The Mattole River watershed provides critical habitat for threatened and endangered species, including coho and Chinook salmon, steelhead trout, and the Pacific lamprey. There are no major reservoirs or dams on the river, and the water is primarily used for agriculture and recreational purposes such as fishing, swimming, and river rafting.