Alert archive / Virginia / Flash Flood Watches in 2011

Flash Flood Watch 1, NWS Wakefield, VA

July 8, 20116 counties in Virginia; 4 counties in Maryland

NWS Wakefield, VA issued this flash flood watch at Jul 8, 2011, 3:56 AM EDT for 6 counties in Virginia; 4 counties in Maryland. It took effect at Jul 8, 2011, 3:00 PM EDT. It was in force for 9 hr.

The area

The counties it named.

The facts

Issued
Jul 8, 2011, 3:56 AM EDT (07:56 UTC)
In effect from
Jul 8, 2011, 3:00 PM EDT
Expired
Jul 8, 2011, 11:44 PM EDT
In force
9 hr
Issued by
NWS Wakefield, VA
Flood severity
None

Counties Dorchester County, MD, Somerset County, MD, Wicomico County, MD, Worcester County, MD, Caroline County, VA, Fluvanna County, VA, Goochland County, VA, Northumberland County, VA, Richmond County, VA, Westmoreland County, VA

The radar

The Norfolk radar (KAKQ), 124 km from the middle of the area, began a volume at 08:00 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, 7.9 hours before the alert went out and 119 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 2011-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 276 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 2011-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 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
276 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
2030 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
-11 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Wakefield, VA wrote its last area forecast discussion before this flash flood watch went out at Jul 7, 8:16 PM EDT, 7 hours 40 minutes earlier.

Area forecast discussion, Jul 7, 8:16 PM EDT, 7 hours 40 minutes before
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Hazardous weather outlook, Jul 7, 4:37 PM EDT, 11 hours 19 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE WAKEFIELD VA
437 PM EDT THU JUL 7 2011

MDZ021>025-NCZ012>017-030>032-102-VAZ048-049-060>100-082045-
DORCHESTER-WICOMICO-SOMERSET-INLAND WORCESTER-MARYLAND BEACHES-
NORTHAMPTON NC-HERTFORD-GATES-PASQUOTANK-CAMDEN-INLAND CURRITUCK-
BERTIE-CHOWAN-PERQUIMANS-OUTER BANKS CURRITUCK-FLUVANNA-LOUISA-
PRINCE EDWARD-CUMBERLAND-GOOCHLAND-HANOVER-CAROLINE-MECKLENBURG-
LUNENBURG-NOTTOWAY-AMELIA-POWHATAN-CHESTERFIELD-HENRICO-KING WILLIAM-
KING AND QUEEN-ESSEX-WESTMORELAND-RICHMOND-NORTHUMBERLAND-LANCASTER-
BRUNSWICK-DINWIDDIE-PRINCE GEORGE-CHARLES CITY-NEW KENT-GLOUCESTER-
MIDDLESEX-MATHEWS-GREENSVILLE-SUSSEX-SURRY-JAMES CITY-YORK-
SOUTHAMPTON-ISLE OF WIGHT-NEWPORT NEWS/HAMPTON-NORFOLK/PORTSMOUTH-
SUFFOLK-CHESAPEAKE-VIRGINIA BEACH-ACCOMACK-NORTHAMPTON VA-
437 PM EDT THU JUL 7 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE LOWER EASTERN SHORE OF
MARYLAND...COASTAL NORTHEAST NORTH CAROLINA...INTERIOR NORTHEAST
NORTH CAROLINA...THE NORTHERN OUTER BANKS OF NORTH
CAROLINA...CENTRAL VIRGINIA...EAST CENTRAL VIRGINIA...INTERIOR
SOUTHEAST VIRGINIA...SOUTH CENTRAL VIRGINIA...SOUTH HAMPTON ROADS
VIRGINIA...THE EASTERN SHORE OF VIRGINIA...THE MIDDLE PENINSULA OF
VIRGINIA...THE NORTHERN NECK OF VIRGINIA...THE PENINSULA OF
SOUTHEAST VIRGINIA AND THE PIEDMONT OF CENTRAL VIRGINIA.

.DAY ONE...TONIGHT.

ISOLATED TO WIDELY SCATTERED THUNDERSTORMS WILL REMAIN POSSIBLE THIS
EVENING. A FEW OF THE STORMS MAY PRODUCE GUSTY WINDS AND LOCALLY
HEAVY DOWNPOURS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

THERE IS A SLIGHT RISK FOR SEVERE WEATHER FRIDAY AFTERNOON AND
EVENING. THE PRIMARY THREAT WILL BE FROM DAMAGING WINDS...WITH
LARGE HAIL ALSO POSSIBLE. IN ADDITION TO THE SEVERE THREAT...A
WARM AND HUMID AIRMASS WILL BE FAVORABLE FOR VERY HEAVY RAINFALL...
AND LOCALIZED FLOODING FROM LATE FRIDAY AFTERNOON THROUGH SATURDAY
MORNING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED FRIDAY AFTERNOON AND EVENING.

ANZ630>634-650-652-654-656-658-082045-
CHESAPEAKE BAY FROM SMITH POINT TO WINDMILL POINT VA-
CHESAPEAKE BAY FROM WINDMILL POINT TO NEW POINT COMFORT VA-
CHESAPEAKE BAY FROM NEW POINT COMFORT TO LITTLE CREEK VA-
CURRITUCK SOUND-
CHESAPEAKE BAY FROM LITTLE CREEK TO CAPE HENRY VA...INCLUDING THE
CHESAPEAKE BAY BRIDGE TUNNEL-
COASTAL WATERS FROM FENWICK ISLAND DE TO CHINCOTEAGUE VA OUT TO
20 NM-
COASTAL WATERS FROM CHINCOTEAGUE TO PARRAMORE ISLAND VA OUT TO 20 NM-
COASTAL WATERS FROM PARRAMORE ISLAND TO CAPE CHARLES LIGHT VA OUT TO
20 NM-
COASTAL WATERS FROM CAPE CHARLES LIGHT VA TO NC VA BORDER OUT TO
20 NM-
COASTAL WATERS FROM NC VA BORDER TO CURRITUCK BEACH LIGHT NC OUT TO
20 NM-
437 PM EDT THU JUL 7 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE CENTRAL CHESAPEAKE
BAY...THE SOUTHERN CHESAPEAKE BAY...THE MID ATLANTIC COASTAL WATERS
AND CURRITUCK SOUND.

.DAY ONE...TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

HURLEY

The office that day

Everything else NWS Wakefield, VA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 8, 5:36 AM EDTSpecial Weather StatementAKQBrunswick39 min
Jul 8, 5:37 AM EDTSpecial Weather StatementAKQSussex38 min
Jul 8, 6:22 AM EDTSpecial Weather StatementAKQGloucester, Lancaster, Mathews, Middlesex, City of Williamsburg53 min
Jul 8, 6:42 AM EDTSpecial Weather StatementAKQDinwiddie63 min
Jul 8, 7:54 AM EDTSpecial Weather StatementAKQSurry, York, City of Williamsburg21 min
Jul 8, 8:16 AM EDTAreal Flood AdvisoryAKQGloucester, Isle of Wight, James City, King and Queen, Surry, York and 2 more59 min
Jul 8, 9:28 AM EDTAreal Flood AdvisoryAKQGloucester, Isle of Wight, James City, King and Queen, Mathews, Surry and 5 more62 min
Jul 8, 2:36 PM EDTAreal Flood AdvisoryAKQGloucester, James City, Mathews, Surry, York, City of Williamsburg84 min
Jul 8, 3:12 PM EDTSpecial Weather StatementAKQDinwiddie, City of Petersburg78 min
Jul 8, 3:42 PM EDTSpecial Weather StatementAKQLouisa33 min
Jul 8, 4:09 PM EDTSpecial Weather StatementAKQChesterfield, Henrico, King William, New Kent, City of Colonial Heights, City of Hopewell and 2 more81 min
Jul 8, 5:33 PM EDTSpecial Weather StatementAKQCaroline, Fluvanna, Goochland, Hanover, Louisa57 min
Jul 8, 5:44 PM EDTSpecial Weather StatementAKQCaroline46 min
Jul 8, 6:01 PM EDTSpecial Weather StatementAKQDorchester, Somerset, Wicomico74 min

Nearby

Flash Flood Watches in Virginia, 2011Flash Flood Watches in Maryland, 2011Every flash flood watch 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.