2025-12-20T00:00:00-07:00
...CRITICAL FIRE WEATHER CONDITIONS THURSDAY AND FRIDAY... Strong northwest winds will spread across the northeast plains after sunrise today, with gusts 45 to 65 mph creating critical fire weather conditions despite somewhat marginal humidity values near 20%. Early Friday, westerly downslope winds will bring strong gusts to the Front Range mountains and foothills, with potential for these to spread into wind-favored portions of the adjacent lower elevations. Peak gusts of 70-90 mph are increasing in likelihood for the windiest locations (considerably lower for areas along and east of I-25). With a warmer and drier air mass in place, humidity values in the teens look to extend into much of the foothills, and certainly across the lower elevations. Such conditions may be a longer duration than usual, with potential for low humidity to extend into the evening hours prior to the arrival of a front. The National Weather Service in Denver has issued a Fire Weather Watch for wind and low relative humidity, which is in effect from Friday morning through Friday evening. * AFFECTED AREA...Fire Weather Zones 215, 216, 241, 243, 245, 246 and 247. * TIMING...From Friday morning through late Friday evening. * WINDS...West 25 to 35 mph with gusts up to 80 mph in and near the foothills. West 15 to 25 mph with gusts up to 45 mph for areas roughly along and east of I-25. * RELATIVE HUMIDITY...As low as 10 to 15%. * 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
Casselman River
was last observed at
174
cfs, and is expected to yield approximately
345
acre-ft of water today; about 22%
of normal.
River levels are low and may signify a drought.
Average streamflow for this time of year is
791 cfs,
with recent peaks last observed
on
2025-05-14 when daily discharge volume was observed at
29,280 cfs.
Maximum discharge along the river is currently at the
Casselman River At Markleton
reporting a streamflow rate of 89.5 cfs.
However, the streamgauge with the highest stage along the river is the
Casselman River At Grantsville
with a gauge stage of 1.65 ft.
This river is monitored from 2 different streamgauging stations along the Casselman River, the highest being situated at an altitude of 2,135 ft, the
Casselman River At Grantsville.
River Details
| Last Updated | 2025-12-15 |
| Discharge Volume | 345 ACRE-FT |
| Streamflow |
173.9 cfs
-70.1 cfs (-28.73%) |
| Percent of Normal | 21.97% |
| Maximum |
29,280.0 cfs
2025-05-14 |
| Seasonal Avg | 791 cfs |
River Streamflow Levels
| Streamgauge | Streamflow | Gauge Stage | 24hr Change (%) | % Normal | Minimum (cfs) | Maximum (cfs) | Air Temp | Elevation |
|---|---|---|---|---|---|---|---|---|
|
Casselman River At Grantsville
USGS 03078000 |
84 cfs | 1.65 ft | -23.27 | |||||
|
Casselman River At Markleton
USGS 03079000 |
90 cfs | 1.39 ft | -33.21 |
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile
The Casselman River is a 56.5-mile-long (90.9 km) tributary of the Youghiogheny River in western Maryland and Pennsylvania in the United States.The Casselman River rises in Garrett County atop the plateau of western Maryland as two branches, the south one east of Meadow Mountain, the north one farther west, between Meadow Mountain and Negro Mountain. The two branches flow northward combining just southwest of Grantsville, Maryland. The river then continues north into Pennsylvania, following a great arc across the Laurel Highlands of Somerset County, Pennsylvania to the community of Confluence, where Laurel Hill Creek joins a few meters above the Youghiogheny River.The river has been used for transportation across the Allegheny Mountains, between the cities of Baltimore and Washington, D.C. in the east and Pittsburgh in the west. Two railroads followed the Casselman River from Meyersdale, Pennsylvania to Confluence. First is the B&O Railroad, running between Baltimore and Pittsburgh, which was completed in 1827, and is currently owned by CSX. Second is the Western Maryland Railway, which ran from Cumberland, Maryland to Connellsville, Pennsylvania. Although the Western Maryland was abandoned in the 1980s, the right-of-way has been converted into the Great Allegheny Passage, a rail trail bicycle and hiking path.