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Posted at 9:50 AM ET, 03/14/2010

Minor to moderate flooding with rivers still rising

By Dan Stillman

* Full Forecast | Flood Warnings for rivers across the area *
* Coastal Flood Warning for Tidal Potomac & Chesapeake Bay *
* Radar & more: Weather Wall | Did you change your clocks? *

The heaviest rains have finished. But there's been enough since Thursday night (around 1-3" in most spots, over 3.5" at BWI) to cause some minor flooding along the Potomac in Alexandria, Va. yesterday, as well as in urban areas and near small streams in Frederick and Loudoun counties. More significant localized flooding, mainly from overflowing rivers, is expected across the region today into tomorrow.

Flood Warnings and Coastal Flood Warnings are in effect for rivers throughout the area as they continue to rise, and also along the Chesapeake Bay. Mostly minor to moderate is already happening or forecast between tonight and Tuesday along the metro area portions of the Potomac. Waters downstream of Harpers Ferry are predicted to crest Sunday night into Monday.

According to the National Weather Service...

* THE FLOOD WARNING CONTINUES FOR
THE SOUTH BRANCH POTOMAC NEAR SPRINGFIELD.
* AT 5:30 AM SUNDAY THE STAGE WAS 19.1 FEET.
* FLOOD STAGE IS 15.0 FEET.
* MODERATE FLOODING IS OCCURRING AND MINOR FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO BELOW FLOOD STAGE BY LATE THIS AFTERNOON.


* THE FLOOD WARNING CONTINUES FOR
THE POTOMAC RIVER AT POINT OF ROCKS.
* AT 5:45 AM SUNDAY THE STAGE WAS 21.2 FEET.
* FLOOD STAGE IS 16.0 FEET.
* MODERATE FLOODING IS OCCURRING AND MAJOR FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL CONTINUE RISING TO NEAR 25.5 FEET BY TOMORROW MORNING. THE RIVER WILL FALL BELOW FLOOD STAGE TUESDAY EVENING.


THE FLOOD WARNING CONTINUES FOR
THE POTOMAC RIVER NEAR LITTLE FALLS.
* AT 5:45 AM SUNDAY THE STAGE WAS 10.8 FEET.
* FLOOD STAGE IS 10.0 FEET.
* MINOR FLOODING IS OCCURRING AND MODERATE FLOODING IS FORECAST.
* FORECAST...THE RIVER WILL CONTINUE RISING TO NEAR 12.6 FEET BY TOMORROW EARLY AFTERNOON. THE RIVER WILL FALL BELOW FLOOD STAGE TUESDAY EARLY AFTERNOON. AT 12.0 FEET, WATER WILL BEGIN TO INUNDATE THE C&O TOWPATH, ALONG THE MARYLAND SIDE OF THE RIVER. DOWNSTREAM IN THE DISTRICT OF COLUMBIA AT WISCONSIN AVENUE, THE TIDAL POTOMAC RIVER WILL NEAR ITS 7 FOOT FLOOD STAGE AT TIME OF HIGH TIDE.


THE FLOOD WARNING CONTINUES FOR
THE GOOSE CREEK NEAR LEESBURG.
* AT 6:15 AM SUNDAY THE STAGE WAS 12.2 FEET.
* FLOOD STAGE IS 12.0 FEET.
* MINOR FLOODING IS OCCURRING.
* FORECAST...THE RIVER WILL CONTINUE TO FALL TO BELOW FLOOD STAGE BY THIS MORNING. AT 13.0 FEET, WATER FLOODS MAINLY LOW LYING AREAS.

See all flood warnings here, and graphical flood forecasts for specific locations using the map here.

By Dan Stillman  | March 14, 2010; 9:50 AM ET
Categories:  Floods, Forecasts  
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Next: Forecast: Gray & damp, improvement by Tuesday

Comments

Um...First

Posted by: OMGPonies | March 13, 2010 10:47 PM | Report abuse

Question: Why was BWI's 2009-10 seasonal snowfall reduced from 80.4" to 77" a couple of days ago? Which BWI data needed to be adjusted?

Not only does the NWS blow the weather forecasts (as happened with this weekend's predicted D.C. monsoon), but some of their climatological data is now suspect. Many of us recall how IAD snowfall data was misreported in February, the excuse being that the NWS was fatigued by the snow. Is that the rationale being offered for the BWI inaccuracy?

And was somebody was snoozing when the DCA's woeful Snowmaggedon snow measurements were taken. Maybe the NWS needs to go back and carefully scrutinize the measurements in Washington's snowfall Death Valley for that storm.

Thankfully, enough CWG posters took measurements and confirmed that 70"-plus inches was the reality for this past winter's total snowfall in metro D.C.

Posted by: JerryFloyd1 | March 13, 2010 11:09 PM | Report abuse

They took some off the December storm, probably per the same reason they lowered the storm total in Feb at BWI.. clearing the measurement surface too often. Here's some discussion on it.

Posted by: Ian-CapitalWeatherGang | March 14, 2010 12:18 AM | Report abuse

Anyone awoken by the thunderstorms to our south (Fredericksburg area)?? And, dont forget SET YOUR CLOCKS AHEAD ONE HOUR at 2am.

Posted by: Camden-CapitalWeatherGang | March 14, 2010 12:36 AM | Report abuse

Camden, yes, I was just awakened by the thunderstorm and was surprised to see it pouring outside despite the forecast for only light rain. Looking at the radar, we might get at least another inch from this storm. Simply amazing....

Posted by: david_in_stafford | March 14, 2010 1:36 AM | Report abuse

The comments to this entry are closed.

 
 
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