Active Normal USGS

Long Green Creek At Glen Arm, MD

Updated August 3, 2026 at 06:15:00 PM EDT · ProvisionalUSGS real-time data that has not finished review. Values can be revised, corrected, or removed after approval. · Site 01584050

Current conditions

Historical trends

Full-year history is still loading for this station. Shorter ranges are available now; the 1 Year chart will fill in as we finish backfilling from USGS.

Hourly measurements

Detailed readings by hour, organized by day

Nearby stations

Other monitoring locations nearby

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Data courtesy of the U.S. Geological Survey.