Alert archive / Virginia / Flash Flood Warnings in 2006

Flash Flood Warning 82, NWS Baltimore/Washington

June 27, 20065 counties in Virginia

NWS Baltimore/Washington issued this flash flood warning at Jun 27, 2006, 8:17 PM EDT for 5 counties in Virginia. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 27, 2006, 8:17 PM EDT (00:17 UTC)
Expired
Jun 28, 2006, 2:15 AM EDT
In force
6 hr
Issued by
NWS Baltimore/Washington
Area
Counties, with a storm outline in the text

Counties City of Fairfax, VA, City of Manassas, VA, City of Manassas Park, VA, Fairfax County, VA, Prince William County, VA

The radar

The Sterling radar (KLWX), 23 km from the middle of the area, began a volume at 00:19 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 nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.3 hours before the alert went out and 19 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Washington/Dulle, VA at 00:00Z on 2006-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 408 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 00:00Z on 2006-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 91 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
408 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
632 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
91 m²/s²
0-3 km storm-relative helicity
108 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash 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 flash flood warning went out at Jun 27, 6:21 PM EDT, 1 hour 56 minutes earlier.

Area forecast discussion, Jun 27, 6:21 PM EDT, 1 hour 56 minutes before
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Hazardous weather outlook, Jun 27, 6:32 PM EDT, 1 hour 45 minutes before
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In the hours before

Local storm report, Jun 27, 3:45 PM EDT, 4 hours 32 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
345 PM EDT TUE JUN 27 2006

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

0145 PM     FLASH FLOOD      SPOTSYLVANIA            38.20N 77.59W
06/27/2006                   SPOTSYLVANIA       VA   LAW ENFORCEMENT

            DEBRIS OVER THE ROAD NEAR JEFFERSON DAVIS HGWY AND
            SPOTSYLVANIA PARKWAY.

0125 PM     FLASH FLOOD      MONTEREY                38.41N 79.58W
06/27/2006                   HIGHLAND           VA   LAW ENFORCEMENT

            SEVERAL LOW WATER CROSSINGS COVERED WITH WATER
            COUNTYWIDE.

&&

SMZ
Local storm report, Jun 27, 3:58 PM EDT, 4 hours 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
358 PM EDT TUE JUN 27 2006

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

0330 PM     FLASH FLOOD      HAGERSTOWN              39.64N 77.72W
06/27/2006                   WASHINGTON         MD   FIRE DEPT/RESCUE

            SEVERAL ROAD CLOSURES IN HAGERSTOWN. BASEMENT FLOODING
            REPORTED.

&&

SMZ
Local storm report, Jun 27, 4:59 PM EDT, 3 hours 18 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
459 PM EDT TUE JUN 27 2006

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

0453 PM     FLASH FLOOD      INWOOD                  39.35N 78.05W
06/27/2006                   BERKELEY           WV   TRAINED SPOTTER

            INTERSECTION OF US 11 AND RT 51 HAS BETWEEN 9 TO 12
            INCHES WATER.

&&

SMZ
Local storm report, Jun 27, 6:16 PM EDT, 2 hours 1 minute before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 27, 8:31 PM EDTFlash Flood WarningLWXAlbemarle, Greene, Madison, City of Charlottesville6 hr
Jun 27, 8:54 PM EDTFlash Flood WarningLWXPage, Rappahannock, Warren6 hr
Jun 27, 9:10 PM EDTFlash Flood WarningLWXClarke, Fauquier, Loudoun, Spotsylvania, Stafford, City of Fredericksburg6 hr
Jun 27, 9:25 PM EDTFlash Flood WarningLWXFrederick, Shenandoah, City of Winchester6 hr
Jun 27, 9:54 PM EDTFlash Flood WarningLWXAugusta, Nelson, Rockingham6 hr
Jun 27, 10:12 PM EDTFlash Flood WarningLWXCulpeper, Orange6 hr
Jun 27, 11:04 PM EDTDense Fog AdvisoryLWXClarke, Culpeper, Frederick, Greene, Madison, Nelson and 13 more5 hr
Jun 28, 3:32 PM EDTSevere Thunderstorm WarningLWXFrederick58 min
Jun 28, 6:15 PM EDTSpecial Marine WarningLWX90 min
Jun 27, 8:58 PM EDTFlash Flood WarningLWXAnne Arundel, Baltimore, Harford, City of Baltimore6 hr
Jun 27, 11:19 PM EDTFlash Flood WarningLWXCarroll, Frederick, Montgomery6 hr
Jun 27, 11:27 PM EDTFlash Flood WarningLWXWashington6 hr
Jun 28, 12:19 AM EDTFlash Flood WarningLWXMontgomery4 hr
Jun 28, 2:54 AM EDTFlash Flood WarningLWXBaltimore, Harford, City of Baltimore3 hr
Jun 28, 4:15 AM EDTFlash Flood WarningLWXMontgomery6 hr
Jun 28, 10:00 AM EDTFlash Flood WarningLWXMontgomery4 hr
Jun 28, 2:00 PM EDTFlash Flood WarningLWXMontgomery6 hr

Nearby

Flash Flood Warnings in Virginia, 2006Every flash flood warning in 2006

Sources

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