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Elev 367 ft, 38.95 °N, 77.41 °W

Herndon, VA Severe Weather Alertstar_ratehome

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Current Station
Personal Weather Station
Location: Herndon, VA
Elevation: 367ft
Nearby Weather Stations

Active Weather Alerts

Small Craft Advisory
Issued: 5:02 PM May. 13, 2025 – National Weather Service
...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 4 AM EDT WEDNESDAY...

* WHAT...Southeast winds 10 to 20 kt with gusts up to 30 kt.

* WHERE...Tidal Potomac River from Key Bridge to Cobb Island MD.

* WHEN...Until 4 AM EDT Wednesday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

Flood Watch
Issued: 4:08 PM May. 13, 2025 – National Weather Service
...FLOOD WATCH REMAINS IN EFFECT THROUGH LATE TONIGHT...

* WHAT...Flooding caused by excessive rainfall continues to be
possible.

* WHERE...Portions of DC, including the following , District of
Columbia, Maryland, including the following areas, Central and
Eastern Allegany, Central and Southeast Montgomery, Eastern
Garrett, Extreme Western Allegany, Frederick MD, Northwest
Montgomery and Washington, Virginia, including the following
areas, Arlington/Falls Church/Alexandria, Central and Southeast
Prince William/Manassas/Manassas Park, Clarke, Culpeper, Eastern
Loudoun, Fairfax, Frederick VA, King George, Northern Fauquier,
Northwest Prince William, Orange, Southern Fauquier, Spotsylvania,
Stafford and Western Loudoun, and West Virginia, including the
following areas, Berkeley, Eastern Mineral, Hampshire, Jefferson,
Morgan and Western Mineral.

* WHEN...Through late tonight.

* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Low-water crossings may be flooded.

* ADDITIONAL DETAILS...
- A prolonged period of moderate to heavy rain showers with
embedded thunderstorms is expected through late tonight.
Rainfall amounts of 2 to 4 inches are likely, with locally
higher amounts possible along the eastern slopes of the Blue
Ridge and Allegheny Mountains. This rainfall may lead to
scattered instances of flooding.
- Please visit www.weather.gov/safety/flood for flood safety
and preparedness information

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.

&&

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