Alert archive / Virginia / River Flood Warnings in 2008

River Flood Warning 13, NWS Baltimore/Washington

May 11, 2008Loudoun County, Virginia

NWS Baltimore/Washington issued this river flood warning at May 11, 2008, 11:20 PM EDT for Loudoun County, Virginia. It took effect at May 12, 2008, 3:00 AM EDT. It was in force for 33 hr.

The area

The counties it named.

The facts

Issued: May 11, 2008, 11:20 PM EDT (03:20 UTC)
In effect from: May 12, 2008, 3:00 AM EDT
Expired: May 13, 2008, 11:41 AM EDT
In force: 33 hr
Issued by: NWS Baltimore/Washington
Flood severity: Minor

County Loudoun County, VA

The radar

The Sterling radar (KLWX), 18 km from the middle of the area, began a volume at 03:22 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 Goose Creek near Leesburg (LEEV2).

Action stage: 10 ft
Minor stage: 12 ft
Moderate stage: 15 ft
Major stage: 18 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 01644000, 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 May 11, 9:54 PM EDT, 1 hour 26 minutes earlier.

Area forecast discussion, May 11, 9:54 PM EDT, 1 hour 26 minutes before

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Hazardous weather outlook, May 11, 10:15 PM EDT, 1 hour 5 minutes before

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In the hours before

Local storm report, May 11, 7:25 PM EDT, 3 hours 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
725 PM EDT SUN MAY 11 2008

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

0723 PM     FLOOD            ALDIE                   38.98N 77.64W
05/11/2008                   LOUDOUN            VA   TRAINED SPOTTER

            FLOODING ON ROUTE 50 IN ALDIE

&&

SAR

Local storm report, May 11, 9:00 PM EDT, 2 hours 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
900 PM EDT SUN MAY 11 2008

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

0840 PM     FLOOD            POOLESVILLE             39.14N 77.41W
05/11/2008                   MONTGOMERY         MD   EMERGENCY MNGR

            WATER RESUCE AT WESTERLY ROAD AND EDWARDS FERRY ROAD

0855 PM     FLOOD            CHANTILLY               38.88N 77.41W
05/11/2008                   FAIRFAX            VA   EMERGENCY MNGR

            WATER RESCUE REPORTED IN CHANTILLY

&&

SAR

Local storm report, May 11, 10:47 PM EDT, 33 minutes before

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Local storm report, May 11, 11:01 PM EDT, 19 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 9:00 PM EDT	Areal Flood Warning	LWX	King George, Spotsylvania, City of Fredericksburg	6 hr
May 11, 11:20 PM EDT	River Flood Warning	LWX	Culpeper, Fauquier	34 hr
May 11, 11:24 PM EDT	Areal Flood Warning	LWX	Loudoun	18 hr
May 11, 11:27 PM EDT	Areal Flood Warning	LWX	Fauquier, Prince William, City of Manassas	18 hr
May 11, 11:31 PM EDT	Areal Flood Warning	LWX	Arlington, Fairfax, City of Alexandria, City of Fairfax, City of Falls Church	18 hr
May 11, 11:34 PM EDT	Areal Flood Warning	LWX	Stafford	12 hr
May 12, 12:02 AM EDT	Coastal Flood Warning	LWX	Arlington, Fairfax, Stafford, City of Alexandria, City of Fairfax, City of Falls Church	6 hr
May 12, 12:14 AM EDT	Areal Flood Warning	LWX	Clarke	12 hr
May 12, 12:22 AM EDT	Areal Flood Warning	LWX	Culpeper, Rappahannock	12 hr
May 12, 2:58 AM EDT	Areal Flood Warning	LWX	Spotsylvania	4 hr
May 12, 11:47 AM EDT	Areal Flood Warning	LWX	Stafford	6 hr
May 12, 3:30 PM EDT	River Flood Warning	LWX	Loudoun	37 hr
May 12, 3:30 PM EDT	River Flood Warning	LWX	Fairfax	37 hr
May 11, 8:12 PM EDT	Areal Flood Warning	LWX	Anne Arundel, Howard, Montgomery, Prince George's	6 hr
May 11, 8:50 PM EDT	Areal Flood Warning	LWX	Carroll, Frederick	6 hr
May 11, 9:02 PM EDT	Areal Flood Warning	LWX	Charles	6 hr
May 11, 9:04 PM EDT	Areal Flood Warning	LWX	Baltimore, Harford, City of Baltimore	8 hr
May 11, 9:21 PM EDT	Wind Advisory	LWX	Anne Arundel, Baltimore, Calvert, Saint Mary's, City of Baltimore	7 hr
May 11, 10:13 PM EDT	Areal Flood Warning	LWX	Calvert, Saint Mary's	16 hr
May 11, 11:20 PM EDT	River Flood Warning	LWX	Frederick	43 hr
May 11, 11:20 PM EDT	River Flood Warning	LWX	Montgomery	16 hr
May 11, 11:20 PM EDT	River Flood Warning	LWX	Washington	43 hr
May 12, 12:54 AM EDT	Areal Flood Warning	LWX	Washington	5 hr
May 12, 2:18 AM EDT	Areal Flood Warning	LWX	Anne Arundel, Montgomery, Prince George's	16 hr
May 12, 2:41 AM EDT	Areal Flood Warning	LWX	Frederick	18 hr
May 12, 4:44 AM EDT	Areal Flood Warning	LWX	Carroll, Howard	12 hr
May 12, 4:59 AM EDT	Areal Flood Warning	LWX	Charles	12 hr
May 12, 2:34 PM EDT	Areal Flood Warning	LWX	Calvert, Saint Mary's	6 hr
May 11, 11:20 PM EDT	River Flood Warning	LWX	Berkeley	46 hr
May 11, 11:45 PM EDT	Areal Flood Warning	LWX	Jefferson	12 hr
May 12, 1:12 AM EDT	Areal Flood Warning	LWX	Berkeley	10 hr
May 12, 11:52 AM EDT	Areal Flood Warning	LWX	Jefferson	6 hr

Nearby

River Flood Warnings in Virginia, 2008 Every river flood warning in 2008

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.