Station Name: DIFFICULT RUN NEAR GREAT FALLS, VA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 184 feet

Nearest Address:
9200 Old Dominion Dr
McLean, VA 22102
Fairfax County

GPS Coordinates: 38.97594346, -77.24581439

Nearby Water Temperatures

Wind Advisory issued February 7 at 6:25PM EST until February 7 at 10:00PM EST by NWS Baltimore MD/Washington DC

Effective: Sat February 7, 2026, 6:25 PM
Expires: Sun February 8, 2026, 2:30 AM

* WHAT...For the Extreme Cold Warning, dangerously cold wind chills as low as 10 below zero. For the Wind Advisory, northwest winds 20 to 30 mph with gusts up to 50 mph. * WHERE...The District of Columbia, central, northeast, northern, and southern Maryland, and northern Virginia. * WHEN...For the Wind Advisory, until 10 PM EST this evening. For the Extreme Cold Warning, until 10 AM EST Sunday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. The cold wind chills as low as 10 below zero could result in hypothermia if precautions are not taken. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Dress in layers including a hat, face mask, and gloves if you must go outside. Keep pets indoors as much as possible. Make sure outdoor animals have a warm, dry shelter, food, and unfrozen water. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside. If you do not have heat in your home or lack shelter, you can call 211 or visit your local county or city website for assistance locating appropriate shelter from the cold.

Extreme Cold Warning issued February 7 at 6:25PM EST until February 8 at 10:00AM EST by NWS Baltimore MD/Washington DC

Effective: Sat February 7, 2026, 6:25 PM
Expires: Sun February 8, 2026, 2:30 AM

* WHAT...For the Extreme Cold Warning, dangerously cold wind chills as low as 10 below zero. For the Wind Advisory, northwest winds 20 to 30 mph with gusts up to 50 mph. * WHERE...The District of Columbia, central, northeast, northern, and southern Maryland, and northern Virginia. * WHEN...For the Wind Advisory, until 10 PM EST this evening. For the Extreme Cold Warning, until 10 AM EST Sunday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. The cold wind chills as low as 10 below zero could result in hypothermia if precautions are not taken. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures.

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. Dress in layers including a hat, face mask, and gloves if you must go outside. Keep pets indoors as much as possible. Make sure outdoor animals have a warm, dry shelter, food, and unfrozen water. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside. If you do not have heat in your home or lack shelter, you can call 211 or visit your local county or city website for assistance locating appropriate shelter from the cold.

Extreme Cold Warning issued February 7 at 10:04PM EST until February 8 at 10:00AM EST by NWS Baltimore MD/Washington DC

Effective: Sat February 7, 2026, 10:04 PM
Expires: Sun February 8, 2026, 6:15 AM

* WHAT...Dangerously cold wind chills as low as 10 below zero. * WHERE...Portions of DC, central, northeast, northern, and southern Maryland, and northern Virginia. * WHEN...Until 10 AM EST Sunday. * IMPACTS...The cold wind chills as low as 10 below zero could result in hypothermia if precautions are not taken. Frostbite and hypothermia will occur if unprotected skin is exposed to these temperatures. * ADDITIONAL DETAILS...Wind chills are expected to remain below zero through late Sunday morning. Being outdoors for a prolonged period of time will be life-threatening.

Dress in layers including a hat, face mask, and gloves if you must go outside. Keep pets indoors as much as possible. Make sure outdoor animals have a warm, dry shelter, food, and unfrozen water. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside. If you do not have heat in your home or lack shelter, you can call 211 or visit or visit your local county or city website for assistance locating appropriate shelter from the cold.

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

Effective: Sun February 8, 2026, 1:29 AM
Expires: Sun February 8, 2026, 1:39 AM

Monitoring message only. Please disregard.

Monitoring message only. Please disregard.