Red Flag Warning
2026-04-23T00:00:00-06:00

The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 10 AM Wednesday to midnight MDT Wednesday night. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 214, 216, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250 and 251. * TIMING...From 10 AM Wednesday to midnight MDT Wednesday night. * WINDS...Southwest 15 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...4 to 9 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.

Marys River

Last Updated: April 21, 2026

Total streamflow across the Marys River was last observed at 404 cfs, and is expected to yield approximately 801 acre-ft of water today; about 72% of normal. Average streamflow for this time of year is 561 cfs, with recent peaks last observed on 2012-01-19 when daily discharge volume was observed at 8,922 cfs.

Maximum discharge along the river is currently at the Marys River Near Philomath reporting a streamflow rate of 333 cfs. This is also the highest stage along the Marys River, with a gauge stage of 5.95 ft at this location. This river is monitored from 3 different streamgauging stations along the Marys River, the highest being situated at an altitude of 5,950 ft, the Marys River Below Orange Bridge Nr Charleston Nv.

The Marys River is a river in western Oregon that flows for approximately 41 miles from the Coast Range to the Willamette River.


15-Day Long Term Forecast


River Details

Last Updated 2026-04-20
Discharge Volume 801 ACRE-FT
Streamflow 403.7 cfs
Past 24 Hours: -70.6 cfs (-14.89%)
Percent of Normal 72.02%
Maximum 8,922.0 cfs
2012-01-19
Seasonal Avg 561 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Marys River Below Orange Bridge Nr Charleston Nv
USGS 10313400
8 cfs 1.58 ft
Marys R Ab Hot Springs C Nr Deeth
USGS 10315500
31 cfs 1.96 ft -4.66
Marys River Near Philomath
USGS 14171000
333 cfs 5.95 ft -15.68
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The St. Marys River (named Saint Marys River by the USGS, and sometimes misspelled as St. Mary's River) is a 126-mile-long (203 km) river in the southeastern United States. From near its source in the Okefenokee Swamp, to its mouth at the Atlantic Ocean, it forms a portion of the border between the U.S. states of Georgia and Florida. The river also serves as the southernmost point in the state of Georgia.
The St. Marys River rises as a tiny stream, River Styx, flowing from the western edge of Trail Ridge, the geological relic of a barrier island/dune system, and into the southeastern Okefenokee Swamp. Arching to the northwest, it loses its channel within the swamp, then turns back to the southwest and reforms a stream, at which point it becomes the St. Marys River. Joined by another stream, Moccasin Creek, the river emerges from Okefenokee Swamp at Baxter, Florida/Moniac, Georgia. It then flows south, then east, then north, then east-southeast, finally emptying its waters into the Atlantic, near St. Marys, Georgia and Fernandina Beach, Florida.