Station Name: DEAD RUN AT WHANN AVENUE NEAR MCLEAN, VA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 226 feet

Nearest Address:
800 Whann Ave
McLean, VA 22101
Fairfax County

GPS Coordinates: 38.95977716, -77.1756743

Nearby Water Temperatures

Freeze Watch issued April 18 at 11:59PM EDT until April 21 at 10:00AM EDT by NWS Baltimore MD/Washington DC

Effective: Sat April 18, 2026, 11:59 PM
Expires: Sun April 19, 2026, 8:00 AM

* WHAT...Sub-freezing temperatures as low as 29 to 32 degrees possible, especially northwest of I-95. * WHERE...In Maryland, Central and Southeast Howard, Central and Southeast Montgomery, Southeast Harford, and Southern Baltimore Counties. In Virginia, Albemarle, Nelson, Spotsylvania, Central and Southeast Prince William/Manassas/Manassas Park, Fairfax, and Stafford Counties. * WHEN...From late Monday night through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.

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

Effective: Sun April 19, 2026, 2:29 AM
Expires: Sun April 19, 2026, 2:39 AM

Monitoring message only. Please disregard.

Monitoring message only. Please disregard.

Freeze Watch issued April 18 at 11:59PM EDT until April 21 at 10:00AM EDT by NWS Baltimore MD/Washington DC

Effective: Sat April 18, 2026, 11:59 PM
Expires: Sun April 19, 2026, 8:00 AM

* WHAT...Sub-freezing temperatures as low as 26 to 30 degrees possible. * WHERE...Portions of central, north central, northeast, and northern Maryland, central, northern, northwest, and western Virginia, and panhandle West Virginia. * WHEN...From late Monday night through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold.

Coastal Flood Advisory issued April 18 at 10:40PM EDT until April 19 at 10:00AM EDT by NWS Baltimore MD/Washington DC

Effective: Sat April 18, 2026, 10:40 PM
Expires: Sun April 19, 2026, 6:45 AM

* WHAT...Up to one foot of inundation above ground level in low lying areas due to tidal flooding. * WHERE...Shoreline in Anne Arundel County. * WHEN...From 3 AM to 10 AM EDT Sunday, especially around the time of high tide. * IMPACTS...At 2.8 feet, flooding of some of the parking area near Dock Street in Annapolis may occur, with water surrounding the Alex Haley Memorial. * ADDITIONAL DETAILS...Tides one to one and a half feet above normal. The next high tide at Annapolis U.S. Naval Academy is at 7:26 AM and 7:20 PM.

If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.