Alert archive / Maryland / River Flood Warnings in 2016

River Flood Warning 15, NWS Baltimore/Washington

September 29, 2016Montgomery County, Maryland

NWS Baltimore/Washington issued this river flood warning at Sep 29, 2016, 9:52 AM EDT for Montgomery County, Maryland. It took effect at Sep 29, 2016, 10:52 PM EDT. It was in force for 16 hr.

The area

The counties it named.

The facts

Issued
Sep 29, 2016, 9:52 AM EDT (13:52 UTC)
In effect from
Sep 29, 2016, 10:52 PM EDT
Expired
Sep 30, 2016, 2:45 PM EDT
In force
16 hr
Issued by
NWS Baltimore/Washington
Area
Storm-based polygon
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 13:54 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 3.88 ft at Sep 29, 2016, 12:00 PM EDT.

actionminormoderate51009/2909/3010/01
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 Sep 29, 5:36 AM EDT, 4 hours 16 minutes earlier.

Area forecast discussion, Sep 29, 5:36 AM EDT, 4 hours 16 minutes before
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Hazardous weather outlook, Sep 29, 7:48 AM EDT, 2 hours 4 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
748 AM EDT THU SEP 29 2016

ANZ530>543-DCZ001-MDZ011-013-014-016>018-508-VAZ052>057-301200-
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-SOUTHERN BALTIMORE-PRINCE GEORGES-
ANNE ARUNDEL-CHARLES-ST. MARYS-CALVERT-SOUTHEAST HARFORD-
PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-
ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA-
KING GEORGE-
748 AM EDT THU SEP 29 2016

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...TODAY AND TONIGHT

A FLASH FLOOD WATCH IS IN EFFECT FOR THE ENTIRE OUTLOOK AREA.
PLEASE REFER TO FLASH FLOOD MESSAGE FOR MORE DETAILS.

A GALE WARNING IS IN EFFECT FOR THE MAIN CHANNEL OF THE CHESAPEAKE
BAY AND EASTERN INLETS THROUGH MID-MORNING.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THE FLASH FLOOD WATCH CONTINUES INTO FRIDAY MORNING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

MDZ003>006-501>507-VAZ025>031-036>040-050-051-501>508-WVZ050>053-
055-501>506-301200-
WASHINGTON-FREDERICK MD-CARROLL-NORTHERN BALTIMORE-
EXTREME WESTERN ALLEGANY-CENTRAL AND EASTERN ALLEGANY-
NORTHWEST MONTGOMERY-CENTRAL AND SOUTHEAST MONTGOMERY-
NORTHWEST HOWARD-CENTRAL AND SOUTHEAST HOWARD-NORTHWEST HARFORD-
AUGUSTA-ROCKINGHAM-SHENANDOAH-FREDERICK VA-PAGE-WARREN-CLARKE-
NELSON-ALBEMARLE-GREENE-MADISON-RAPPAHANNOCK-ORANGE-CULPEPER-
NORTHERN FAUQUIER-SOUTHERN FAUQUIER-WESTERN HIGHLAND-
EASTERN HIGHLAND-WESTERN LOUDOUN-EASTERN LOUDOUN-
NORTHERN VIRGINIA BLUE RIDGE-CENTRAL VIRGINIA BLUE RIDGE-
HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON-HARDY-WESTERN GRANT-
EASTERN GRANT-WESTERN MINERAL-EASTERN MINERAL-WESTERN PENDLETON-
EASTERN PENDLETON-
748 AM EDT THU SEP 29 2016

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...TODAY AND TONIGHT

A FLASH FLOOD WATCH IS IN EFFECT FOR THE AREA EXCEPT THE SOUTHERN
ALLEGHENY HIGHLANDS. PLEASE REFER TO THE FLASH FLOOD MESSAGE FOR
MORE DETAILS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THE FLASH FLOOD WATCH CONTINUES INTO FRIDAY MORNING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

In the hours before

Local storm report, Sep 29, 5:27 AM EDT, 4 hours 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
527 AM EDT THU SEP 29 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0250 AM     FLASH FLOOD      2 ENE BETHEL            39.04N  78.00W
09/29/2016                   CLARKE             VA   911 CALL CENTER

            ROUTE 50 WESTBOUND CLOSED NEAR SWIFT SHOALS ROAD DUE TO
            FLOODING

&&

EVENT NUMBER LWX1604896

RCM
Local storm report, Sep 29, 5:30 AM EDT, 4 hours 22 minutes before
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Local storm report, Sep 29, 5:32 AM EDT, 4 hours 20 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
532 AM EDT THU SEP 29 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0500 AM     FLOOD            1 ESE SPRING VALLEY     38.33N  77.45W
09/29/2016                   STAFFORD           VA   911 CALL CENTER

            HARRELL ROAD CLOSED DUE TO FLOODING

&&

EVENT NUMBER LWX1604898

RCM
Local storm report, Sep 29, 5:42 AM EDT, 4 hours 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
542 AM EDT THU SEP 29 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0530 AM     FLOOD            2 WSW BURKE             38.77N  77.31W
09/29/2016                   FAIRFAX            VA   911 CALL CENTER

            BURKE LAKE ROAD CLOSED NEAR JEREMIAH COURT DUE TO
            FLOODING

&&

EVENT NUMBER LWX1604899

RCM
Local storm report, Sep 29, 8:12 AM EDT, 1 hour 40 minutes before
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Local storm report, Sep 29, 8:35 AM EDT, 1 hour 17 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Sep 28, 9:00 PM EDTCoastal Flood AdvisoryLWXArlington, Fairfax, King George, Stafford, City of Alexandria, City of Fairfax and 1 more4 days
Sep 28, 9:04 PM EDTSpecial Marine WarningLWX116 min
Sep 29, 1:46 AM EDTGale WarningLWX8 hr
Sep 29, 1:46 AM EDTSmall Craft AdvisoryLWX56 hr
Sep 29, 1:59 AM EDTAreal Flood WarningLWXClarke, Fauquier, Frederick, Loudoun, Rappahannock, Warren and 1 more6 hr
Sep 29, 2:34 AM EDTFlash Flood WarningLWXClarke, Fauquier, Frederick, Loudoun, Rappahannock, Warren and 1 more5 hr
Sep 29, 4:46 AM EDTAreal Flood WarningLWXArlington, Culpeper, Fairfax, Fauquier, King George, Prince William and 7 more6 hr
Sep 29, 5:12 AM EDTAreal Flood WarningLWXFrederick, City of Winchester6 hr
Sep 29, 10:11 AM EDTRiver Flood WatchLWXCulpeper, Fauquier52 hr
Sep 29, 10:11 AM EDTRiver Flood WatchLWXStafford, City of Fredericksburg52 hr
Sep 29, 5:28 PM EDTAreal Flood WarningLWXFauquier, Frederick, Madison, Page, Rappahannock, Shenandoah and 1 more6 hr
Sep 29, 5:55 PM EDTGale WarningLWX4 hr
Sep 29, 5:55 PM EDTSmall Craft AdvisoryLWX30 hr
Sep 29, 4:55 AM EDTAreal Flood WarningLWXAnne Arundel, Carroll, Howard, Montgomery, Prince George's7 hr
Sep 29, 7:19 AM EDTAreal Flood WarningLWXAnne Arundel, Calvert, Charles, Prince George's, Saint Mary's6 hr
Sep 29, 8:04 AM EDTAreal Flood WarningLWXAnne Arundel, Baltimore, City of Baltimore6 hr
Sep 29, 2:50 PM EDTCoastal Flood WarningLWXAnne Arundel, Saint Mary's53 hr
Sep 29, 9:51 AM EDTRiver Flood WarningLWXBerkeley, Jefferson65 hr
Sep 29, 10:04 AM EDTRiver Flood WatchLWXMorgan64 hr

Nearby

River Flood Warnings in Maryland, 2016Every river flood warning in 2016

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.