Station Name: POTOMAC RIVER AT POINT OF ROCKS, MD
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 217 feet

Nearest Address:
3707 Canal Rd
Point of Rocks, MD 21777
Frederick County

GPS Coordinates: 39.2735833, -77.5431111

Nearby Water Temperatures

Severe Thunderstorm Watch issued June 11 at 7:53PM EDT until June 11 at 10:00PM EDT by NWS Baltimore MD/Washington DC

Effective: Thu June 11, 2026, 7:53 PM
Expires: Thu June 11, 2026, 10:00 PM

SEVERE THUNDERSTORM WATCH 315 REMAINS VALID UNTIL 10 PM EDT THIS EVENING FOR THE FOLLOWING AREAS THE DISTRICT OF COLUMBIA IN MARYLAND THIS WATCH INCLUDES 9 COUNTIES IN CENTRAL MARYLAND ANNE ARUNDEL HOWARD MONTGOMERY PRINCE GEORGES IN NORTH CENTRAL MARYLAND CARROLL FREDERICK IN NORTHERN MARYLAND BALTIMORE BALTIMORE CITY HARFORD IN VIRGINIA THIS WATCH INCLUDES 12 COUNTIES IN NORTHERN VIRGINIA ARLINGTON CITY OF ALEXANDRIA CITY OF FAIRFAX CITY OF FALLS CHURCH CITY OF MANASSAS CITY OF MANASSAS PARK CULPEPER FAIRFAX FAUQUIER LOUDOUN PRINCE WILLIAM IN NORTHWEST VIRGINIA RAPPAHANNOCK THIS INCLUDES THE CITIES OF ABERDEEN, ABINGDON, ADAMS MORGAN, ADEN, AIRLIE, ALEXANDRIA, ANNANDALE, ANNAPOLIS, ARLINGTON, ARNOLD, BALLENGER CREEK, BALLSTON, BALTIMORE, BARCROFT, BETHEL, BETHESDA, BOWIE, BOYDS, BUCKEYSTOWN, BURKE, BYNUM, CARDOVA, CATALPA, CATONSVILLE, CHANTILLY, CHERRYDALE, CHESTER GAP, CLARKSVILLE, CLINTON, COLLEGE PARK, COLUMBIA, COUNTRYSIDE, CULPEPER, DALE CITY, DULLES INTERNATIONAL AIRPORT, DUNDALK, EDGEWOOD, ELDERSBURG, ESSEX, FAIRFAX, FAIRFAX STATION, FALLS CHURCH, FELLS POINT, FOUR CORNERS, FREDERICK, GAITHERSBURG, GAMBER, GERMANTOWN, GLEEDSVILLE, GLEN BURNIE, GLENMONT, GREENBELT, HARFORD FURNACE, HICKORY, HISTORIC ELLICOTT CITY, INDEPENDENT HILL, LAKE RIDGE, LANGLEY, LEESBURG, LUCKETTS, MAGNOLIA, MANASSAS, MANASSAS PARK, MCLEAN, MONTCLAIR, MONTPELIER, OAK GROVE, PARK HEIGHTS, PARK MILLS, PARKVILLE, RANDALLSTOWN, RAPIDAN, REAGAN NATIONAL AIRPORT, RESTON, REVA, RIDGEWAY, RIVERCREST, ROSSLYN, SEVERN, SEVERNA PARK, SILVER SPRING, SIMPSONVILLE, SOUTH GATE, STERLING PARK, STEVENSBURG, SUITLAND-SILVER HILL, TANTALLON, TOWSON, TURNBULL, WARRENTON, WASHINGTON, WESTMINSTER, WINSTON, WOODBRIDGE, WOODLAWN, AND WOODSTOCK.

Severe Thunderstorm Warning issued June 11 at 8:29PM EDT until June 11 at 9:30PM EDT by NWS Baltimore MD/Washington DC

Effective: Thu June 11, 2026, 8:29 PM
Expires: Thu June 11, 2026, 9:30 PM

SVRLWX The National Weather Service in Sterling Virginia has issued a * Severe Thunderstorm Warning for... The District of Columbia... Baltimore City in northern Maryland... St. Marys County in southern Maryland... Howard County in central Maryland... Southeastern Montgomery County in central Maryland... Calvert County in southern Maryland... Baltimore County in northern Maryland... Prince Georges County in central Maryland... Eastern Carroll County in north central Maryland... Anne Arundel County in central Maryland... Harford County in northern Maryland... Cecil County in northeastern Maryland... Charles County in southern Maryland... Stafford County in northern Virginia... The City of Fredericksburg in central Virginia... Southeastern Fairfax County in northern Virginia... Southeastern Culpeper County in northern Virginia... Southeastern Prince William County in northern Virginia... King George County in central Virginia... Southeastern Arlington County in northern Virginia... The eastern City of Alexandria in northern Virginia... Northeastern Spotsylvania County in central Virginia... * Until 930 PM EDT. * At 827 PM EDT, severe thunderstorms were located along a line extending from near Shrewsbury to Elkridge to near Beltsville to near Waldorf to near Dahlgren, moving east at 40 mph. HAZARD...60 mph wind gusts. SOURCE...Emergency Management has reported many instances of trees down with this line of storms. IMPACT...Damaging winds will cause some trees and large branches to fall. This could injure those outdoors, as well as damage homes and vehicles. Roadways may become blocked by downed trees. Localized power outages are possible. Unsecured light objects may become projectiles. * Locations impacted include... Baltimore, Arlington, Alexandria, Stafford, Columbia, Waldorf, Bethesda, Bowie, Severn, Annapolis, Clinton, Olney, Pikesville, College Park, Crofton, Middle River, Fredericksburg, Fort Washington, Greenbelt, and Cockeysville.

For your protection move to an interior room on the lowest floor of a building.

This is only a test for monitoring of vital dissemination systems.

Effective: Thu June 11, 2026, 8:28 PM
Expires: Thu June 11, 2026, 8:38 PM

Monitoring message only. Please disregard.

Monitoring message only. Please disregard.

Heat Advisory issued June 11 at 3:16PM EDT until June 12 at 8:00PM EDT by NWS Baltimore MD/Washington DC

Effective: Thu June 11, 2026, 3:16 PM
Expires: Thu June 11, 2026, 11:30 PM

* WHAT...For both Heat Advisories, heat index values up to 107. * WHERE...Portions of DC, central, northeast, northern, and southern Maryland, and central and northern Virginia. * WHEN...For the first Heat Advisory, until 8 PM EDT this evening. For the second Heat Advisory, from 11 AM to 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

Heat Advisory issued June 11 at 8:11AM EDT until June 12 at 8:00PM EDT by NWS State College PA

Effective: Thu June 11, 2026, 8:11 AM
Expires: Fri June 12, 2026, 6:00 AM

* WHAT...Heat index values up to 103 degrees expected. * WHERE...Adams, Cumberland, Dauphin, Lancaster, Lebanon, and York Counties. * WHEN...Until 8 PM EDT Friday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Some showers and thunderstorms this afternoon and Friday may provide local relief from the heat, but it will remain very humid. It will then turn much less humid this weekend in the wake of a cold front, but temperatures will remain above normal.

Drink plenty of fluids, stay out of the sun, and stay in an air-conditioned room. Know the signs and symptoms of heat exhaustion and heat stroke. Review heat safety and preparedness information at weather.gov/safety/heat. Check up on relatives and neighbors, and provide pets with adequate water and shelter from the sun. Young children and pets should never be left unattended in vehicles under any circumstances. This is especially true during hot weather when car interiors can reach lethal temperatures in a matter of minutes. LOOK BEFORE YOU LOCK.