Alert archive / Maryland / River Flood Warnings in 2011

River Flood Warning 16, NWS Baltimore/Washington

March 10, 2011Montgomery County, Maryland

NWS Baltimore/Washington issued this river flood warning at Mar 10, 2011, 2:46 PM EST for Montgomery County, Maryland. It took effect at Mar 10, 2011, 10:16 PM EST. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Mar 10, 2011, 2:46 PM EST (19:46 UTC)
In effect from
Mar 10, 2011, 10:16 PM EST
Expired
Mar 11, 2011, 3:46 AM EST
In force
6 hr
Issued by
NWS Baltimore/Washington
Flood severity
Minor

County Montgomery County, MD

The radar

The Sterling radar (KLWX), 30 km from the middle of the area, began a volume at 19:47 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The river

Written for the forecast point Seneca Creek at Dawsonville (DAWM2). The gauge peaked at 7.51 ft at Mar 10, 2011, 11:00 PM EST.

actionminormoderate51003/1003/1103/12
Action stage
5 ft
Minor stage
7.5 ft
Moderate stage
11 ft
Major stage
16 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01645000, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Baltimore/Washington wrote its last area forecast discussion before this river flood warning went out at Mar 10, 1:35 PM EST, 1 hour 11 minutes earlier.

Area forecast discussion, Mar 10, 1:35 PM EST, 1 hour 11 minutes before
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Hazardous weather outlook, Mar 10, 1:32 PM EST, 1 hour 14 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
132 PM EST THU MAR 10 2011

ANZ530>543-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057-
111000-
CHESAPEAKE BAY NORTH OF POOLES ISLAND MD-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD-
CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD-
TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
CHESTER RIVER TO QUEENSTOWN MD-EASTERN BAY-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
PATUXENT RIVER TO BROOMES ISLAND MD-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH
ISLAND-DISTRICT OF COLUMBIA-NORTHERN BALTIMORE-HARFORD-
SOUTHERN BALTIMORE-PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS-
CALVERT-PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-
ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA-
KING GEORGE-
132 PM EST THU MAR 10 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE MARYLAND PORTION OF THE
CHESAPEAKE BAY...TIDAL POTOMAC RIVER...AND ADJACENT COUNTIES IN
CENTRAL MARYLAND AND NORTHERN VIRGINIA AS WELL AS THE DISTRICT OF
COLUMBIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 8 PM FOR
SPOTSYLVANIA...STAFFORD AND KING GEORGE COUNTIES. IF THUNDERSTORMS
HOLD TOGETHER...THIS MAY EVENTUALLY NEED TO BE EXPANDED INTO
SOUTHERN MARYLAND. SCATTERED THUNDERSTORMS THIS AFTERNOON AND
EARLY EVENING WILL BE CAPABLE OF PRODUCING DAMAGING WIND GUSTS.
THERE IS ALSO THE POSSIBILITY OF AN ISOLATED TORNADO.

A COASTAL FLOOD WARNING IS IN EFFECT FOR AREAS ALONG THE TIDAL
POTOMAC RIVER AND WESTERN SIDE OF THE CHESAPEAKE BAY THROUGH
TONIGHT.

A FLOOD WATCH IS IN EFFECT FOR THE OUTLOOK AREA THROUGH THIS
EVENING. PLEASE REFER TO THE LATEST HAZARD MESSAGE /WBCFFALWX/
FOR FURTHER DETAILS.

A GALE WARNING IS IN EFFECT FOR THE LOWER TIDAL POTOMAC RIVER AND
MUCH OF THE MARYLAND CHESAPEAKE BAY THROUGH THIS EVENING.
OTHERWISE...A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE WATERS
THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE MARYLAND CHESAPEAKE
BAY AND TIDAL POTOMAC RIVER THROUGH FRIDAY MIDDAY.

A COASTAL FLOOD ADVISORY COULD BE NECESSARY ON FRIDAY FOR AREAS
ADJACENT TO THE TIDAL POTOMAC RIVER AND CHESAPEAKE BAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED FOR SEVERE WEATHER THIS AFTERNOON.
RAINFALL TOTALS ARE APPRECIATED TODAY.

MDZ003>005-009-010-501-502-VAZ025>031-036>040-042-050-051-501>504-
WVZ050>053-055-501>506-111000-
WASHINGTON-FREDERICK MD-CARROLL-MONTGOMERY-HOWARD-
EXTREME WESTERN ALLEGANY-CENTRAL AND EASTERN ALLEGANY-AUGUSTA-
ROCKINGHAM-SHENANDOAH-FREDERICK VA-PAGE-WARREN-CLARKE-NELSON-
ALBEMARLE-GREENE-MADISON-RAPPAHANNOCK-LOUDOUN-ORANGE-CULPEPER-
NORTHERN FAUQUIER-SOUTHERN FAUQUIER-WESTERN HIGHLAND-
EASTERN HIGHLAND-HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON-HARDY-
WESTERN GRANT-EASTERN GRANT-WESTERN MINERAL-EASTERN MINERAL-
WESTERN PENDLETON-EASTERN PENDLETON-
132 PM EST THU MAR 10 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN WEST VIRGINIA...
NORTHERN AND CENTRAL VIRGINIA...AND CENTRAL AND WESTERN MARYLAND
WITH THE EXCEPTION OF GARRETT COUNTY.

.DAY ONE...THIS AFTERNOON AND TONIGHT

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 8 PM FROM HIGHLAND
COUNTY VIRGINIA EAST THROUGH THE CENTRAL SHENANDOAH VALLEY AND
INTO PORTIONS OF THE NORTHERN VIRGINIA PIEDMONT. SCATTERED THUNDERSTORMS
THIS AFTERNOON AND EARLY EVENING WILL BE CAPABLE OF PRODUCING
DAMAGING WIND GUSTS. THERE IS ALSO THE POSSIBILITY OF AN ISOLATED
TORNADO.

A FLOOD WATCH IS IN EFFECT THROUGH THIS EVENING FOR THE OUTLOOK
AREA. PLEASE REFER TO THE LATEST HAZARD MESSAGE /WBCFFALWX/ FOR
FURTHER DETAILS.

ACCUMULATING SNOWFALL IS EXPECTED ACROSS THE WESTERN SLOPES OF
THE ALLEGHENY FRONT TONIGHT. A WINTER WEATHER ADVISORY MAY BE
NEEDED.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

DEPENDING ON HOW MUCH RAINFALL IS RECEIVED TODAY...MAIN STEM
RIVER FLOODING ACROSS THE POTOMAC...SHENANDOAH...AND RAPPAHANNOCK
RIVERS IS POSSIBLE FRIDAY INTO SATURDAY.

ACCUMULATING SNOWFALL IS EXPECTED ACROSS THE WESTERN SLOPES OF THE
ALLEGHENY FRONT FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED FOR SEVERE WEATHER THIS AFTERNOON.
RAINFALL TOTALS ARE APPRECIATED.

The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 9, 9:26 PM ESTRiver Flood WarningLWXSpotsylvania, Stafford, City of Fredericksburg30 hr
Mar 9, 9:26 PM ESTRiver Flood WarningLWXLoudoun30 hr
Mar 10, 9:46 AM ESTCoastal Flood WarningLWXArlington, Fairfax, King George, Stafford, City of Alexandria, City of Fairfax and 1 more17 hr
Mar 10, 1:06 PM ESTGale WarningLWX8 hr
Mar 10, 1:06 PM ESTSmall Craft AdvisoryLWX37 hr
Mar 10, 2:35 PM ESTFlash Flood WarningLWXAlbemarle, Augusta, Nelson, City of Charlottesville, City of Staunton, City of Waynesboro4 hr
Mar 10, 2:57 PM ESTSpecial Weather StatementLWXAlbemarle, Augusta, Nelson, City of Charlottesville, City of Staunton, City of Waynesboro48 min
Mar 10, 3:04 PM ESTAreal Flood WarningLWXArlington, Fairfax, Prince William, Stafford, City of Alexandria, City of Fairfax and 1 more3 hr
Mar 10, 3:25 PM ESTWinter Weather AdvisoryLWXHighland24 hr
Mar 10, 3:58 PM ESTSpecial Marine WarningLWX92 min
Mar 10, 4:28 PM ESTSpecial Weather StatementLWXCulpeper, Orange, Spotsylvania, Stafford, City of Fredericksburg32 min
Mar 10, 4:34 PM ESTSpecial Weather StatementLWXGreene, Madison, Orange, Page, Rappahannock, City of Charlottesville26 min
Mar 10, 4:36 PM ESTFlash Flood WarningLWXAlbemarle, Culpeper, Fauquier, Greene, King George, Madison and 5 more3 hr
Mar 10, 5:02 PM ESTAreal Flood WarningLWXAugusta, Culpeper, Greene, Madison, Page, Rappahannock and 2 more3 hr
Mar 10, 5:02 PM ESTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Madison, Page, Rappahannock, Warren58 min
Mar 10, 5:18 PM ESTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Madison, Orange, Spotsylvania, Stafford and 1 more57 min
Mar 10, 5:24 PM ESTSpecial Weather StatementLWXClarke, Frederick, City of Winchester36 min
Mar 10, 5:26 PM ESTAreal Flood WarningLWXClarke, Frederick, Page, Shenandoah, Warren, City of Winchester3 hr
Mar 10, 5:28 PM ESTSpecial Marine WarningLWX92 min
Mar 10, 5:34 PM ESTSevere Thunderstorm WarningLWXClarke, Fauquier, Frederick, Loudoun, Warren, City of Winchester41 min
Mar 10, 5:48 PM ESTFlash Flood WarningLWXArlington, Fairfax, Fauquier, King George, Loudoun, Prince William and 6 more4 hr
Mar 10, 6:04 PM ESTSpecial Weather StatementLWXFauquier, Prince William, City of Manassas26 min
Mar 10, 6:07 PM ESTFlash Flood WarningLWXLoudoun3 hr
Mar 10, 6:10 PM ESTSevere Thunderstorm WarningLWXCulpeper, Fairfax, Fauquier, King George, Loudoun, Orange and 7 more65 min
Mar 10, 6:14 PM ESTTornado WarningLWXFauquier, Prince William31 min
Mar 10, 6:20 PM ESTSpecial Weather StatementLWXLoudoun25 min
Mar 10, 6:38 PM ESTAreal Flood WarningLWXFrederick3 hr
Mar 10, 6:58 PM ESTTornado WarningLWXFairfax, Loudoun, Prince William, City of Manassas, City of Manassas Park32 min
Mar 10, 12:37 PM ESTAreal Flood WarningLWXAnne Arundel, Baltimore, Harford, Howard, City of Baltimore6 hr
Mar 10, 4:06 PM ESTAreal Flood WarningLWXAnne Arundel, Montgomery, Prince George's4 hr
Mar 10, 6:06 PM ESTSpecial Weather StatementLWXWashington24 min
Mar 10, 6:29 PM ESTFlash Flood WarningLWXAnne Arundel, Baltimore, Carroll, Frederick, Harford, Howard and 2 more4 hr
Mar 9, 9:26 PM ESTRiver Flood WarningLWXHampshire47 hr
Mar 10, 3:32 PM ESTSpecial Weather StatementLWXHampshire, Hardy, Mineral28 min
Mar 10, 3:57 PM ESTFlash Flood WarningLWXHampshire, Hardy3 hr

Nearby

River Flood Warnings in Maryland, 2011Every river flood warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.