MARYLAND FLOW REPORT
Last Updated: December 19, 2025
River aficionados and water enthusiasts in Maryland, take heed: recent streamflow data reveals a state experiencing significantly lower than normal water levels across its rivers, with potential implications for recreational activities as well as local ecosystems. Specifically, the Susquehanna River at Conowingo and the Patuxent River near Bowie are flowing at rates 82.49% and 82.98% below normal, respectively. Notable too is the Potomac River, a vital waterway for the region, showing a concerning low streamflow at multiple points, including near Washington, D.C. (92.19% below normal), Point of Rocks (89.33% below normal), and at Paw Paw (87.75% below normal). Such drastic decreases can affect not only water availability but also the quality of river-based recreation, including the popular whitewater trails along the Youghiogheny River near Friendsville.
In contrast to the overall trend, Deer Creek near Darlington and the Youghiogheny River displayed a significant 24-hour increase in streamflow of 44.75 cfs and 49.58 cfs, respectively. While these surges are noteworthy, they do not indicate a high probability of flooding, given the current gage heights of 1.46 feet for Deer Creek and 3.02 feet for the Youghiogheny River. These fluctuations, however, could signal the onset of flow variability which is of interest for those monitoring seasonal trends and preparing for the potential impacts on whitewater activities, fish habitats, and water resources management. It's important for communities along these rivers, including the areas surrounding Darlington, Bowie, Cumberland, and Frederick, to stay informed about the current state of their waterways.
Maryland's flow conditions are heavily influenced by its location along the Atlantic coast and the Chesapeake Bay, as well as its varied topography. The state experiences a humid subtropical climate, with hot and humid summers and mild winters. Major surface flows include the Potomac and Patuxent Rivers, which feed into the Chesapeake Bay. Reservoirs and dams such as the Conowingo Dam and Loch Raven Reservoir also contribute to the state's hydrology. The state's watershed includes the Chesapeake Bay watershed, which covers 64,000 square miles and includes six states and the District of Columbia. Snowpack in the Appalachian Mountains can also impact flow conditions in the state. Overall, Maryland's flow conditions are complex and influenced by a variety of factors.
Winter Storm Warnings
December 19 2025
Residents of Maryland should brace for a range of hazardous weather conditions today. The National Weather Service has issued a High Wind Warning with west winds of 25 to 40 mph and gusts up to 65 mph, potentially causing tree and power line damage and widespread outages, particularly in Eastern Garrett and Extreme Western Allegany counties. A Winter Weather Advisory is also in effect for Garrett County with 2 to 4 inches of snow and gusts up to 60 mph expected, which could lead to slippery roads and impact visibility. Additionally, a High Surf Advisory warns of large breaking waves of 8 to 10 feet at Maryland Beaches County, posing risks of dangerous swimming conditions and beach erosion. Wind Advisories have been declared across several counties, including Dorchester, Worcester, and Wicomico, with gusts up to 50 mph capable of knocking down tree limbs and causing power outages. Residents, especially in the mentioned areas, should secure outdoor objects and exercise caution when commuting or engaging in outdoor activities.