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

Elevation Above Sea Level: 226 feet / 69 meters

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

GPS Coordinates: 38.95977716, -77.1756743

Nearby Water Temperatures

Winter Weather Advisory issued December 1 at 9:30AM EST until December 2 at 10:00AM EST by NWS Baltimore MD/Washington DC

Effective: Mon December 1, 2025, 9:30 AM
Expires: Mon December 1, 2025, 5:30 PM

...FIRST WIDESPREAD WINTER EVENT OF THE SEASON... .Precipitation is expected to overspread the area after midnight tonight from southwest to northeast. While precipitation is likely to start as snow areawide, it is expected to mix with and change to sleet and freezing rain for most of the area. Locations along and south of US-50/I-66 likely end the event as rain as temperatures warm through the morning. Areas along the Mason-Dixon Line are most likely to remain all snow through the event, but that remains uncertain given exact low track. The Tuesday morning commute could be impacted for all areas in the Winter Weather Advisory. Updates to the forecast are likely, so please remain weather aware for the first widespread winter event of the season. * WHAT...Mixed precipitation expected. Total snow and sleet accumulations up to one inch and ice accumulations around a light glaze. * WHERE...Northwest Howard and Northwest Montgomery Counties. * WHEN...From 5 AM to 10 AM EST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Tuesday morning commute. * ADDITIONAL DETAILS...Precipitation will begin as a mix of snow, sleet, and freezing rain early Tuesday morning before transitioning to plain rain by late morning.

Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.

Winter Weather Advisory issued December 1 at 7:11AM EST until December 2 at 12:00PM EST by NWS Baltimore MD/Washington DC

Effective: Mon December 1, 2025, 7:11 AM
Expires: Mon December 1, 2025, 3:15 PM

...FIRST WIDESPREAD WINTER EVENT OF THE SEASON... .Precipitation is expected to overspread the area after midnight tonight from southwest to northeast. While precipitation is likely to start as snow areawide, it is expected to mix with and change to sleet and freezing rain for most of the area. Locations along and south of US-50/I-66 likely end the event as rain as temperatures warm through the morning. Areas along the Mason-Dixon Line are most likely to remain all snow through the event, but that remains uncertain given exact low track. The Tuesday morning commute could be impacted for all areas in the Winter Weather Advisory. Updates to the forecast are likely, so please remain weather aware for the first widespread winter event of the season. * WHAT...Mixed precipitation expected, with a majority of the precipitation expected in the form of freezing rain. Total snow and sleet accumulations up to one inch and ice accumulations around one tenth of an inch, with upwards of two tenths of an inch possible on the higher ridges. * WHERE...Portions of central, northern, northwest, and western Virginia and eastern West Virginia. * WHEN...From 1 AM to noon EST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Tuesday morning commute. * ADDITIONAL DETAILS...Precipitation is expected to overspread the area after midnight tonight. Precipitation is expected to start briefly as snow before mixing with and changing over to sleet and freezing rain.

Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.

Winter Weather Advisory issued December 1 at 9:30AM EST until December 2 at 12:00PM EST by NWS Baltimore MD/Washington DC

Effective: Mon December 1, 2025, 9:30 AM
Expires: Mon December 1, 2025, 5:30 PM

...FIRST WIDESPREAD WINTER EVENT OF THE SEASON... .Precipitation is expected to overspread the area after midnight tonight from southwest to northeast. While precipitation is likely to start as snow areawide, it is expected to mix with and change to sleet and freezing rain for most of the area. Locations along and south of US-50/I-66 likely end the event as rain as temperatures warm through the morning. Areas along the Mason-Dixon Line are most likely to remain all snow through the event, but that remains uncertain given exact low track. The Tuesday morning commute could be impacted for all areas in the Winter Weather Advisory. Updates to the forecast are likely, so please remain weather aware for the first widespread winter event of the season. * WHAT...Mixed precipitation expected, with a majority of the precipitation expected in the form of freezing rain. Total snow and sleet accumulations up to one inch and ice accumulations around one tenth of an inch, with upwards of two tenths of an inch possible on the higher ridges. * WHERE...Portions of central, northern, northwest, and western Virginia and eastern West Virginia. * WHEN...From 1 AM to noon EST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Tuesday morning commute. * ADDITIONAL DETAILS...Precipitation is expected to overspread the area after midnight tonight. Precipitation is expected to start briefly as snow before mixing with and changing over to sleet and freezing rain.

Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.

Winter Weather Advisory issued December 1 at 7:11AM EST until December 2 at 1:00PM EST by NWS Baltimore MD/Washington DC

Effective: Mon December 1, 2025, 7:11 AM
Expires: Mon December 1, 2025, 3:15 PM

...FIRST WIDESPREAD WINTER EVENT OF THE SEASON... .Precipitation is expected to overspread the area after midnight tonight from southwest to northeast. While precipitation is likely to start as snow areawide, it is expected to mix with and change to sleet and freezing rain for most of the area. Locations along and south of US-50/I-66 likely end the event as rain as temperatures warm through the morning. Areas along the Mason-Dixon Line are most likely to remain all snow through the event, but that remains uncertain given exact low track. The Tuesday morning commute could be impacted for all areas in the Winter Weather Advisory. Updates to the forecast are likely, so please remain weather aware for the first widespread winter event of the season. * WHAT...Mixed precipitation expected. Total snow and sleet accumulations of 1 to 2 inches, with locally higher amounts upwards of 4 inches possible near the Mason-Dixon Line and higher elevations such as Parr's Ridge. Ice accumulations up to one tenth of an inch. * WHERE...Portions of north central and northern Maryland and eastern West Virginia. * WHEN...From 3 AM to 1 PM EST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Tuesday morning commute. * ADDITIONAL DETAILS...Precipitation is expected to overspread the area after midnight tonight. Precipitation is expected to start as snow before mixing with sleet and freezing rain. Should precipitation stay all snow or snow for a longer period of time, locally higher snowfall amounts would be possible.

Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.

Winter Weather Advisory issued December 1 at 9:30AM EST until December 2 at 1:00PM EST by NWS Baltimore MD/Washington DC

Effective: Mon December 1, 2025, 9:30 AM
Expires: Mon December 1, 2025, 5:30 PM

...FIRST WIDESPREAD WINTER EVENT OF THE SEASON... .Precipitation is expected to overspread the area after midnight tonight from southwest to northeast. While precipitation is likely to start as snow areawide, it is expected to mix with and change to sleet and freezing rain for most of the area. Locations along and south of US-50/I-66 likely end the event as rain as temperatures warm through the morning. Areas along the Mason-Dixon Line are most likely to remain all snow through the event, but that remains uncertain given exact low track. The Tuesday morning commute could be impacted for all areas in the Winter Weather Advisory. Updates to the forecast are likely, so please remain weather aware for the first widespread winter event of the season. * WHAT...Mixed precipitation expected. Total snow and sleet accumulations of 1 to 2 inches, with locally higher amounts upwards of 4 inches possible near the Mason-Dixon Line and higher elevations such as Parr's Ridge. Ice accumulations up to one tenth of an inch. * WHERE...Portions of north central and northern Maryland and panhandle West Virginia. * WHEN...From 3 AM to 1 PM EST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Tuesday morning commute. * ADDITIONAL DETAILS...Precipitation is expected to overspread the area after midnight tonight. Precipitation is expected to start as snow before mixing with sleet and freezing rain. Should precipitation stay all snow or snow for a longer period of time, locally higher snowfall amounts would be possible.

Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.