Northwest Montgomery Severe Watches & Warnings NOAA Weather Radio

Watches & Warnings

Flood Warning
Issued: 5:23 PM EDT Mar. 21, 2019 – National Weather Service

The National Weather Service in Sterling VA has issued a
* Flood Warning for
the Seneca Creek at Dawsonville.
* From this evening until Friday afternoon.
* At 5 PM Thursday the stage was 6.5 feet and rising.
* Flood stage is 7.5 feet.
* Minor flooding is forecast.
* Forecast... rise above flood stage by early this evening and crest
near 9.1 feet by overnight tonight. The river will fall below flood
stage by late tomorrow morning .
* Impact... at 7.5 feet... portions of the Seneca Creek Greenway are
flooded. A small portion of Berryville Road west of Darnestown
begins to flood.
* Flood history... this crest compares to a previous crest of 8.9 feet
on Jul 29 2017.



River flood observed 1pm 7pm 1am 7am crest
location stage stg day time Thu Thu Fri Fri stg day time

Seneca Creek
Dawsonville 7.5 6.5 Thu 5 PM 7.6 9.1 8.6 9.1 Fri 2 am

Lat... Lon 3914 7736 3914 7730 3912 7729 3909 7730
      3907 7731 3907 7736 3910 7736




Areal Flood Watch
Issued: 5:41 PM EDT Mar. 21, 2019 – National Weather Service

... Flood Watch now in effect until 4 am EDT Friday...

The Flood Watch is now in effect for

* portions of Maryland, the District of Columbia, and northern
Virginia, including the following areas, in Maryland, Anne
Arundel, Carroll, central and southeast Howard, central and
southeast Montgomery, Frederick MD, northern Baltimore,
northwest Harford, northwest Howard, northwest Montgomery,
Prince Georges, southeast Harford, and southern Baltimore. The
District of Columbia. In northern Virginia, Arlington/Falls
Church/Alexandria, eastern Loudoun, Fairfax, northern
Fauquier, Prince William/Manassas/Manassas Park, southern
Fauquier, and western Loudoun.

* Until 4 am EDT Friday

* a widespread soaking rain around 2 inches is expected. Isolated
amounts of around 3 inches are possible. The steadiest rain is
expected through 10 PM this evening, with residual runoff persisting
through tonight.

* These rainfall amounts may cause small streams and creeks to
go out of their banks, as well as cause flooding of low-lying,
urban and poor drainage areas.

Precautionary/preparedness actions...

A Flood Watch means there is a potential for flooding based on
current forecasts.

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.



Dhof


Hydrologic Statement
Issued: 4:19 PM EDT Mar. 21, 2019 – National Weather Service

* at 4 PM Thursday the stage was 5.4 feet.
* Flood stage is 7.5 feet.
* No flooding is currently forecast.
* Forecast... the river will rise to near 7.4 feet overnight tonight.
* Impact... at 7.5 feet... portions of the Seneca Creek Greenway are
flooded. A small portion of Berryville Road west of Darnestown
begins to flood.
* Flood history... this crest compares to a previous crest of 7.6 feet
on Feb 4 2016.



River flood observed 1pm 7pm 1am 7am crest
location stage stg day time Thu Thu Fri Fri stg day time

Seneca Creek
Dawsonville 7.5 5.4 Thu 4 PM 5.8 7.4 7.2

Lat... Lon 3914 7736 3914 7730 3912 7729 3909 7730
      3907 7731 3907 7736 3910 7736




Areal Flood Watch
Issued: 5:41 PM EDT Mar. 21, 2019 – National Weather Service

... Flood Watch now in effect until 4 am EDT Friday...

The Flood Watch is now in effect for

* portions of Maryland, the District of Columbia, and northern
Virginia, including the following areas, in Maryland, Anne
Arundel, Carroll, central and southeast Howard, central and
southeast Montgomery, Frederick MD, northern Baltimore,
northwest Harford, northwest Howard, northwest Montgomery,
Prince Georges, southeast Harford, and southern Baltimore. The
District of Columbia. In northern Virginia, Arlington/Falls
Church/Alexandria, eastern Loudoun, Fairfax, northern
Fauquier, Prince William/Manassas/Manassas Park, southern
Fauquier, and western Loudoun.

* Until 4 am EDT Friday

* a widespread soaking rain around 2 inches is expected. Isolated
amounts of around 3 inches are possible. The steadiest rain is
expected through 10 PM this evening, with residual runoff persisting
through tonight.

* These rainfall amounts may cause small streams and creeks to
go out of their banks, as well as cause flooding of low-lying,
urban and poor drainage areas.

Precautionary/preparedness actions...

A Flood Watch means there is a potential for flooding based on
current forecasts.

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.



Dhof


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