Casselman River at Markleton, PA

Somerset County, Pennsylvania · USGS gauge 03079000 · NWS MAKP1 · Pennsylvania river levels

Is Casselman River at Markleton, PA flooding right now?

Casselman River at Markleton, PA measured 1.30 ft on 2026-09-11 01:30:00 UTC. That observation was 7.7 ft below its 9 ft flood stage. This is the latest available reading, not a guarantee of current conditions.

Gauge height

1.30 ft

as of 55 min ago

Streamflow

186 cfs

data refreshed 7 min ago

Minor flooding here begins at 9 ft. The highest crest on record was 16.4 ft on Tue, Mar 17, 1936.

Streamflow outlook

NOAA National Water Model forecast, issued 14 hours ago. The NWM models discharge for every river reach in the country, including the many gauges the National Weather Service does not forecast individually. It is a model, not an official NWS river forecast, and it predicts flow rather than water level.

Flood stages at this gauge

Category	Stage	Current distance
Action	9 ft	7.7 ft below
Minor flood	9 ft	7.7 ft below

New to these numbers? What does flood stage mean? · How to read a river gauge · Why is the river rising?

Highest crests on record

Stage	Date
16.4 ft	1936-03-17
13.26 ft	1996-01-19
11.63 ft	2025-05-13

Nearby gauges

Gauge	Distance	County
Laurel Hill Creek at Ursina, PA	5.6 mi	Somerset County
Youghiogheny River below Confluence, PA	7.9 mi	Fayette County
Youghiogheny River at Youghiogheny River Dam, PA	8.1 mi	Somerset County
Casselman River at Grantsville, MD	11.9 mi	Garrett County
Mill Run at Mineral Spring, MD	12.7 mi	Garrett County

Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.

Sources: USGS monitoring location · NWS gauge & forecast