Maryland River Levels & Streamflow
As of Oct 15, 2026, Maryland rivers are running at 493% of normal across 92 USGS gauges — the highest is 18,300 cfs on the Potomac River At Hancock. Live discharge, gauge height, and percent-of-normal for every USGS streamgauge in Maryland.
Maryland river map
See Maryland’s rivers on a live map
Every gauge, river and reservoir, one tap each:
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Maryland river conditions today
Where rivers are running versus normal, what’s spiking and what’s coming — refreshed daily from USGS and NOAA.
Streamflow levels across Maryland are currently 493% of normal, with the Potomac River At Hancock reporting the highest discharge in the state at 18,300 cfs and a gauge stage of 11.07 ft.
Meanwhile, the Potomac River At Hancock is seeing a spike today — up 810% since yesterday and currently running near peak.
Tap any gauge below for the full hydrograph, paired weather forecast, and historical context. Use the rivers panel to jump into Maryland's named rivers.
How Maryland’s rivers compare to normal
Every gauge placed by its own percent of normal, and three years of the statewide trend.
Where every gauge actually sits
One dot per Maryland streamgauge, placed by its own percent of normal. The state average is a single line through all of it.
Percent of normal compares today's discharge with the historical average for this calendar day. Tap any dot to open that gauge.
Maryland streamflow, three water years
Statewide percent of normal, every day since Oct 2023. The dotted line is normal.
799 daily readings from 92 reporting gauges. Percent of normal is today's statewide discharge against the historical average for the same calendar day — 100% is normal, not "good". The axis tops out at 250%: 44 readings above that — including the 585% peak in Oct 2026 — are drawn along the top edge, so a few flood days cannot flatten three years of everything else. The line breaks in 2 places where the record skips more than five days — those are gaps in reporting, not readings of zero.
Maryland flow report
| Streamgage | Streamflow | Gage height | Water temp | Air temp | Elevation | Watershed |
|---|---|---|---|---|---|---|
|
Susquehanna River At Conowingo, Md
1 day ago · USGS 01578310 |
48,400 cfs | 14.18 ft | · | 84°F | 21 ft | Lower Susquehanna |
|
Potomac River At Point Of Rocks, Md
1 day ago · USGS 01638500 |
24,400 cfs | 6.68 ft | 64°F | 87°F | 192 ft | Middle Potomac-Catoctin |
|
Potomac River Near Wash, Md
1 day ago · USGS 01646500 |
20,100 cfs | 4.92 ft | 45°F | 88°F | 43 ft | Middle Potomac-Catoctin |
|
Potomac River At Hancock, Md
1 day ago · USGS 01613000 |
8,600 cfs | 7.64 ft | · | 86°F | 396 ft | Conococheague-Opequon |
|
Potomac River At Paw Paw, Md
1 day ago · USGS 01610000 |
5,750 cfs | 8.33 ft | · | 87°F | 501 ft | Cacapon-Town |
|
North Branch Potomac River At Kitzmiller, Md
1 day ago · USGS 01595500 |
2,160 cfs | 5.52 ft | · | 80°F | 1,575 ft | North Branch Potomac |
|
Youghiogheny River At Friendsville, Md
1 day ago · USGS 03076500 |
939 cfs | 3.42 ft | 61°F | 78°F | 1,555 ft | Youghiogheny |
|
Monocacy River At Jug Bridge Near Frederick, Md
1 day ago · USGS 01643000 |
822 cfs | 3.27 ft | · | 86°F | 231 ft | Monocacy |
|
North Branch Potomac River Near Cumberland, Md
1 day ago · USGS 01603000 |
752 cfs | 2.97 ft | · | 85°F | 589 ft | North Branch Potomac |
|
Monocacy River At Monocacy Blvd At Frederick, Md
1 day ago · USGS 01642190 |
684 cfs | 3.00 ft | · | 86°F | 259 ft | Monocacy |
|
Conococheague Creek At Fairview, Md
1 day ago · USGS 01614500 |
578 cfs | 2.78 ft | · | 86°F | 438 ft | Conococheague-Opequon |
|
Youghiogheny River Near Oakland, Md
1 day ago · USGS 03075500 |
318 cfs | 2.95 ft | · | 61°F | 2,370 ft | Youghiogheny |
|
Patuxent River Near Bowie, Md
1 day ago · USGS 01594440 |
281 cfs | 5.31 ft | · | 88°F | 20 ft | Patuxent |
|
Wills Creek Near Cumberland, Md
1 day ago · USGS 01601500 |
237 cfs | 2.87 ft | · | 83°F | 703 ft | North Branch Potomac |
|
North Branch Potomac River At Steyer, Md
1 day ago · USGS 01595000 |
195 cfs | 2.89 ft | · | 76°F | 2,276 ft | North Branch Potomac |
|
Antietam Creek Near Sharpsburg, Md
1 day ago · USGS 01619500 |
170 cfs | 2.62 ft | · | 86°F | 367 ft | Conococheague-Opequon |
|
Deer Creek Near Darlington, Md
1 day ago · USGS 01580520 |
140 cfs | 1.60 ft | · | 84°F | 49 ft | Lower Susquehanna |
|
Seneca Creek At Dawsonville, Md
1 day ago · USGS 01645000 |
137 cfs | 2.34 ft | · | 86°F | 216 ft | Middle Potomac-Catoctin |
|
Patapsco River At Hollofield, Md
1 day ago · USGS 01589000 |
121 cfs | 1.78 ft | · | 85°F | 190 ft | Gunpowder-Patapsco |
|
Monocacy River At Bridgeport, Md
1 day ago · USGS 01639000 |
112 cfs | 3.36 ft | · | 84°F | 332 ft | Monocacy |
|
Casselman River At Grantsville, Md
1 day ago · USGS 03078000 |
110 cfs | 1.49 ft | · | 76°F | 2,135 ft | Youghiogheny |
|
Savage River Near Barton, Md
1 day ago · USGS 01596500 |
92 cfs | 1.70 ft | 57°F | 80°F | 1,659 ft | North Branch Potomac |
|
Bear Creek At Friendsville, Md
1 day ago · USGS 03076600 |
90 cfs | 2.14 ft | · | 78°F | 1,640 ft | Youghiogheny |
|
Patuxent River Below Brighton Dam Near Brighton, Md
1 day ago · USGS 01591610 |
86 cfs | 1.90 ft | 70°F | 84°F | 310 ft | Patuxent |
|
Gunpowder Falls At Glencoe, Md
1 day ago · USGS 01582500 |
85 cfs | · | · | 85°F | 247 ft | Gunpowder-Patapsco |
|
Zekiah Swamp Run Near Newtown, Md
1 day ago · USGS 01660920 |
82 cfs | 1.75 ft | · | 88°F | 37 ft | Lower Potomac |
|
Little Patuxent River At Savage, Md
1 day ago · USGS 01594000 |
73 cfs | 3.41 ft | · | 87°F | 126 ft | Patuxent |
|
Big Elk Creek At Elk Mills, Md
1 day ago · USGS 01495000 |
69 cfs | 3.54 ft | · | 83°F | 70 ft | Chester-Sassafras |
|
Deer Creek At Rocks, Md
1 day ago · USGS 01580000 |
63 cfs | 2.17 ft | · | 84°F | 262 ft | Lower Susquehanna |
|
Big Pipe Creek At Bruceville, Md
1 day ago · USGS 01639500 |
62 cfs | 1.27 ft | · | 84°F | 370 ft | Monocacy |
|
Savage Riv Bl Savage Riv Dam Near Bloomington, Md
1 day ago · USGS 01597500 |
60 cfs | · | 60°F | 81°F | 1,382 ft | North Branch Potomac |
|
Town Creek Near Oldtown, Md
1 day ago · USGS 01609000 |
58 cfs | 2.43 ft | · | 87°F | 567 ft | Cacapon-Town |
|
Western Branch At Upper Marlboro, Md
1 day ago · USGS 01594526 |
57 cfs | 2.32 ft | · | 88°F | 9 ft | Patuxent |
|
Bennett Creek At Park Mills, Md
1 day ago · USGS 01643500 |
52 cfs | 1.80 ft | · | 86°F | 304 ft | Monocacy |
|
Sideling Hill Creek Near Bellegrove, Md
1 day ago · USGS 01610155 |
48 cfs | 1.10 ft | · | 86°F | 482 ft | Cacapon-Town |
|
Gwynns Falls At Washington Blvd At Baltimore, Md
1 day ago · USGS 01589352 |
45 cfs | 2.58 ft | · | 88°F | 18 ft | Gunpowder-Patapsco |
|
Georges Creek At Franklin, Md
1 day ago · USGS 01599000 |
43 cfs | 2.40 ft | · | 85°F | 975 ft | North Branch Potomac |
|
Antietam Creek Near Waynesboro, Md
1 day ago · USGS 01619000 |
40 cfs | 2.29 ft | · | 84°F | 547 ft | Conococheague-Opequon |
|
Mattawoman Creek Near Pomonkey, Md
1 day ago · USGS 01658000 |
38 cfs | 2.69 ft | 73°F | 88°F | 46 ft | Lower Potomac |
|
Tuckahoe Creek Near Ruthsburg, Md
1 day ago · USGS 01491500 |
37 cfs | · | · | 89°F | 14 ft | Choptank |
|
Western Run At Western Run, Md
1 day ago · USGS 01583500 |
35 cfs | 1.02 ft | · | 85°F | 265 ft | Gunpowder-Patapsco |
|
Beaverdam Run At Cockeysville, Md
1 day ago · USGS 01583600 |
34 cfs | 2.95 ft | · | 85°F | 245 ft | Gunpowder-Patapsco |
|
Choptank River Near Greensboro, Md
1 day ago · USGS 01491000 |
34 cfs | 2.61 ft | 65°F | 88°F | 5 ft | Choptank |
|
Little Falls At Blue Mount, Md
1 day ago · USGS 01582000 |
33 cfs | · | · | 84°F | 306 ft | Gunpowder-Patapsco |
|
Little Patuxent River At Guilford, Md
1 day ago · USGS 01593500 |
31 cfs | 2.33 ft | · | 86°F | 267 ft | Patuxent |
|
Gunpowder Falls Near Parkton, Md
1 day ago · USGS 01581920 |
30 cfs | 1.49 ft | 55°F | 84°F | 352 ft | Gunpowder-Patapsco |
|
Patuxent River Near Unity, Md
1 day ago · USGS 01591000 |
27 cfs | 2.26 ft | · | 84°F | 383 ft | Patuxent |
|
Winters Run Near Benson, Md
1 day ago · USGS 01581700 |
27 cfs | 1.39 ft | · | 85°F | 190 ft | Gunpowder-Patapsco |
|
Catoctin Creek Near Middletown, Md
1 day ago · USGS 01637500 |
26 cfs | 1.76 ft | · | 85°F | 436 ft | Middle Potomac-Catoctin |
|
North Branch Patapsco River At Cedarhurst, Md
1 day ago · USGS 01586000 |
25 cfs | 1.43 ft | · | 84°F | 423 ft | Gunpowder-Patapsco |
|
Pocomoke River Near Willards, Md
1 day ago · USGS 01485000 |
22 cfs | 5.20 ft | · | 88°F | 22 ft | Pocomoke |
|
Little Gunpowder Falls At Laurel Brook, Md
1 day ago · USGS 01584500 |
21 cfs | 1.16 ft | · | 85°F | 260 ft | Gunpowder-Patapsco |
|
North East Branch Anacostia River At Riverdale, Md
1 day ago · USGS 01649500 |
21 cfs | · | 66°F | 88°F | 14 ft | Middle Potomac-Anacostia-Occoquan |
|
Gwynns Falls At Villa Nova, Md
1 day ago · USGS 01589300 |
19 cfs | · | · | 85°F | 367 ft | Gunpowder-Patapsco |
|
Patuxent Riv Near Laurel, Md
1 day ago · USGS 01592500 |
18 cfs | 4.30 ft | · | 86°F | 160 ft | Patuxent |
|
Cattail Creek Near Glenwood, Md
1 day ago · USGS 01591400 |
18 cfs | · | · | 84°F | 382 ft | Patuxent |
|
Hawlings River Near Sandy Spring, Md
1 day ago · USGS 01591700 |
16 cfs | · | · | 85°F | 307 ft | Patuxent |
|
Gunpowder Falls At Hoffmanville, Md
1 day ago · USGS 01581810 |
15 cfs | 1.20 ft | · | 83°F | 550 ft | Gunpowder-Patapsco |
|
St Marys River At Great Mills, Md
1 day ago · USGS 01661500 |
13 cfs | 1.59 ft | · | 87°F | 13 ft | Lower Potomac |
|
Morgan Run Near Louisville, Md
1 day ago · USGS 01586610 |
12 cfs | 1.46 ft | · | 83°F | 430 ft | Gunpowder-Patapsco |
|
Piscataway Creek At Piscataway, Md
1 day ago · USGS 01653600 |
12 cfs | 2.57 ft | · | 89°F | 16 ft | Middle Potomac-Anacostia-Occoquan |
|
Nassawango Creek Near Snow Hill, Md
1 day ago · USGS 01485500 |
11 cfs | 1.89 ft | · | 89°F | 21 ft | Pocomoke |
|
Jones Falls At Sorrento, Md
1 day ago · USGS 01589440 |
10 cfs | 7.88 ft | · | 86°F | 236 ft | Gunpowder-Patapsco |
|
Marsh Run At Grimes, Md
1 day ago · USGS 01617800 |
9 cfs | 1.15 ft | · | 85°F | 405 ft | Conococheague-Opequon |
|
Georges Run Near Beckleysville, Md
1 day ago · USGS 01581870 |
8 cfs | · | · | 84°F | 521 ft | Gunpowder-Patapsco |
|
Unicorn Branch Near Millington, Md
1 day ago · USGS 01493000 |
7 cfs | 1.87 ft | · | 87°F | 8 ft | Chester-Sassafras |
|
St Clement Creek Near Clements, Md
1 day ago · USGS 01661050 |
7 cfs | · | · | 87°F | 11 ft | Lower Potomac |
|
Morgan Creek Near Kennedyville, Md
1 day ago · USGS 01493500 |
7 cfs | 1.40 ft | · | 88°F | 4 ft | Chester-Sassafras |
|
Chicamacomico River Near Salem, Md
1 day ago · USGS 01490000 |
7 cfs | · | · | 88°F | 2 ft | Blackwater-Wicomico |
|
Bynum Run At Bel Air, Md
1 day ago · USGS 01581500 |
7 cfs | · | · | 85°F | 260 ft | Gunpowder-Patapsco |
|
Nw Branch Anacostia River Near Colesville, Md
1 day ago · USGS 01650500 |
6 cfs | 1.53 ft | · | 86°F | 271 ft | Middle Potomac-Anacostia-Occoquan |
|
Piney Run At Dover, Md
1 day ago · USGS 01583100 |
6 cfs | 1.50 ft | · | 84°F | 380 ft | Gunpowder-Patapsco |
|
Beetree Run At Bentley Springs, Md
1 day ago · USGS 01581960 |
6 cfs | · | · | 83°F | 491 ft | Gunpowder-Patapsco |
|
Beaver Run Near Finksburg, Md
1 day ago · USGS 01586210 |
6 cfs | · | · | 84°F | 431 ft | Gunpowder-Patapsco |
|
Long Green Creek At Glen Arm, Md
1 day ago · USGS 01584050 |
5 cfs | 1.06 ft | · | 85°F | 290 ft | Gunpowder-Patapsco |
|
Sawmill Creek At Glen Burnie, Md
1 day ago · USGS 01589500 |
4 cfs | 1.91 ft | · | 87°F | 34 ft | Gunpowder-Patapsco |
|
Grave Run Near Beckleysville, Md
1 day ago · USGS 01581830 |
4 cfs | · | · | 83°F | 560 ft | Gunpowder-Patapsco |
|
Plumtree Run Near Bel Air, Md
1 day ago · USGS 01581752 |
3 cfs | 1.20 ft | 63°F | 85°F | 187 ft | Gunpowder-Patapsco |
|
Sallie Harris Creek Near Carmichael, Md
1 day ago · USGS 01492500 |
3 cfs | · | · | 88°F | 14 ft | Chester-Sassafras |
|
Dead Run At Franklintown, Md
1 day ago · USGS 01589330 |
3 cfs | · | · | 85°F | 313 ft | Gunpowder-Patapsco |
|
Manokin Branch Near Princess Anne, Md
1 day ago · USGS 01486000 |
2 cfs | 1.64 ft | · | 87°F | 14 ft | Pocomoke |
|
Minebank Run Near Glen Arm, Md
1 day ago · USGS 0158397967 |
2 cfs | 4.14 ft | · | 85°F | 225 ft | Gunpowder-Patapsco |
|
Gwynns Falls Near Delight, Md
1 day ago · USGS 01589197 |
1 cfs | · | · | 84°F | 536 ft | Gunpowder-Patapsco |
|
Whitemarsh Run At White Marsh, Md
1 day ago · USGS 01585100 |
1 cfs | 2.96 ft | · | 87°F | 42 ft | Gunpowder-Patapsco |
|
Whitemarsh Run Near Fullerton, Md
1 day ago · USGS 01585090 |
1 cfs | 1.15 ft | · | 87°F | 138 ft | Gunpowder-Patapsco |
|
Honeygo Run Near White Marsh, Md
1 day ago · USGS 01585104 |
1 cfs | · | · | 86°F | 25 ft | Gunpowder-Patapsco |
|
Birch Branch At Showell, Md
1 day ago · USGS 0148471320 |
1 cfs | 3.53 ft | · | 88°F | 6 ft | Chincoteague |
|
East Branch Herbert Run At Arbutus, Md
1 day ago · USGS 01589100 |
1 cfs | · | · | 87°F | 49 ft | Gunpowder-Patapsco |
|
West Branch Herring Run At Idlewylde, Md
1 day ago · USGS 01585200 |
1 cfs | · | · | 86°F | 286 ft | Gunpowder-Patapsco |
|
Baisman Run At Broadmoor, Md
1 day ago · USGS 01583580 |
0 cfs | 1.12 ft | · | 84°F | 333 ft | Gunpowder-Patapsco |
|
Cranberry Branch Near Westminster, Md
1 day ago · USGS 01585500 |
0 cfs | 1.24 ft | · | 83°F | 672 ft | Gunpowder-Patapsco |
|
South Fork Jabez Branch At Millersville, Md
1 day ago · USGS 01589795 |
0 cfs | 3.16 ft | · | 87°F | 60 ft | Severn |
About Maryland streamflow
What are river levels like in Maryland right now?
As of October 15, 2026, Maryland rivers are running at 493% of normal across 92 USGS streamgauges, and the Potomac River At Hancock is reporting the highest discharge at 18,300 cfs. The full sortable gauge table is below.
Which Maryland river is running highest right now?
As of October 15, 2026, the highest discharge in Maryland is 18,300 cfs on the Potomac River At Hancock. See the sortable gauge table for the full statewide ranking.
Are Maryland rivers high or low right now?
Compare the statewide percent-of-normal on this page: above 100% means Maryland rivers are running higher than the seasonal average for the date, below 100% means lower (a dry spell or drought). Each gauge also shows its own percent of median.
Where does the Maryland streamflow data come from?
The U.S. Geological Survey National Water Information System. USGS streamgauges report continuously (every 15 minutes) and the data is the canonical real-time record for U.S. rivers. Snoflo pulls the latest readings and joins them to a 7-day NOAA weather forecast for each station.
What is cfs?
Cubic feet per second — the standard unit for streamflow. One cfs is about 7.5 gallons per second. Small creeks run at single-digit cfs; the Mississippi at hundreds of thousands.
What does Gauge Height mean?
The water level at the gauge in feet above the reference datum. Used together with discharge to track river state. Flood stage and runnable levels are typically expressed in gauge height (e.g., "flood at 16 ft").
How fresh is the Maryland data?
USGS streamgauges report every 15 minutes; Snoflo re-pulls throughout the day. The AI briefing regenerates daily.
Can I get a flow alert for a Maryland gauge?
Yes. Save any USGS gauge as a favorite in the Snoflo iOS app, set a discharge or stage threshold (e.g. "alert me when discharge crosses 2,000 cfs"), and you'll get a push the moment it crosses.
Is this a substitute for an NWS flood warning?
No. Snoflo is informational. For flood life-safety decisions always follow guidance from your local NWS forecast office and state emergency management. Snoflo data is one input among several.