Minor Flood
9 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Action Stage
9 ft
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Mar 16, 1936 | 16.4 ft | 35,800 cfs |
| Jan 18, 1996 | 13.26 ft | 45,000 cfs |
| May 12, 2025 | 11.63 ft | — |
About This Gauge
USGS Site
NWS LID
MAKP1
River
Casselman River
County
Somerset, PA
Coordinates
39.8597°N, 79.2278°W
Get Flood Alerts for Casselman River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Casselman River at Markleton?
The Casselman River at Markleton gauge is maintained by USGS (site 03079000) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Casselman River at Markleton?
The NWS-defined flood stage for Casselman River at Markleton is 9 feet. Action stage begins at 9 feet. Moderate flooding starts at N/A feet, and major flooding at N/A feet.
How do I get alerts when Casselman River rises?
Download StormCast free on Google Play, go to River Gauges, and add Casselman River at Markleton to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Casselman River at Markleton gauge located?
The gauge is located in Somerset County, Pennsylvania at coordinates 39.8597°N, 79.2278°W. USGS site number: 03079000. Data is provided by the U.S. Geological Survey and the National Weather Service.
On This River
Upstream: Casselman River at Grantsville
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey