Alert archive / Virginia / Tornado Watches in 2013

Tornado Watch 293

June 10, 20137 states

The Storm Prediction Center issued this tornado watch at Jun 10, 2013, 2:02 PM EDT for 7 states. It was in force for 10 hr.

The area

The outline as issued.

The facts

Issued
Jun 10, 2013, 2:02 PM EDT (18:02 UTC)
Expired
Jun 11, 2013, 12:00 AM EDT
In force
10 hr
Issued by
the Storm Prediction Center
Largest hail expected
1 in
Strongest gust expected
60 kt
All 184 counties

Kent County, DE, New Castle County, DE, Sussex County, DE, Anne Arundel County, MD, Baltimore County, MD, Calvert County, MD, Caroline County, MD, Carroll County, MD, Cecil County, MD, Charles County, MD, City of Baltimore, MD, Dorchester County, MD, Frederick County, MD, Harford County, MD, Howard County, MD, Kent County, MD, Montgomery County, MD, Prince George's County, MD, Queen Anne's County, MD, Saint Mary's County, MD, Somerset County, MD, Talbot County, MD, Washington County, MD, Wicomico County, MD, Worcester County, MD, Alleghany County, NC, Bertie County, NC, Camden County, NC, Caswell County, NC, Chowan County, NC, Currituck County, NC, Gates County, NC, Hertford County, NC, Northampton County, NC, Pasquotank County, NC, Perquimans County, NC, Rockingham County, NC, Stokes County, NC, Surry County, NC, Wilkes County, NC, Yadkin County, NC, Atlantic County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ, Adams County, PA, Chester County, PA, Cumberland County, PA, Dauphin County, PA, Delaware County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA, Juniata County, PA, Lancaster County, PA, Lebanon County, PA, Mifflin County, PA, Montgomery County, PA, Perry County, PA, Philadelphia County, PA, York County, PA, Accomack County, VA, Albemarle County, VA, Alleghany County, VA, Amelia County, VA, Amherst County, VA, Appomattox County, VA, Arlington County, VA, Augusta County, VA, Bath County, VA, Bedford County, VA, Botetourt County, VA, Brunswick County, VA, Buckingham County, VA, Campbell County, VA, Caroline County, VA, Carroll County, VA, Charles City County, VA, Charlotte County, VA, Chesterfield County, VA, City of Alexandria, VA, City of Buena Vista, VA, City of Charlottesville, VA, City of Chesapeake, VA, City of Colonial Heights, VA, City of Covington, VA, City of Danville, VA, City of Emporia, VA, City of Fairfax, VA, City of Falls Church, VA, City of Franklin, VA, City of Fredericksburg, VA, City of Galax, VA, City of Hampton, VA, City of Harrisonburg, VA, City of Hopewell, VA, City of Lexington, VA, City of Lynchburg, VA, City of Manassas, VA, City of Manassas Park, VA, City of Martinsville, VA, City of Newport News, VA, City of Norfolk, VA, City of Petersburg, VA, City of Poquoson, VA, City of Portsmouth, VA, City of Radford, VA, City of Richmond, VA, City of Roanoke, VA, City of Salem, VA, City of Staunton, VA, City of Suffolk, VA, City of Virginia Beach, VA, City of Waynesboro, VA, City of Williamsburg, VA, City of Winchester, VA, Clarke County, VA, Craig County, VA, Culpeper County, VA, Cumberland County, VA, Dinwiddie County, VA, Essex County, VA, Fairfax County, VA, Fauquier County, VA, Floyd County, VA, Fluvanna County, VA, Franklin County, VA, Frederick County, VA, Gloucester County, VA, Goochland County, VA, Greene County, VA, Greensville County, VA, Halifax County, VA, Hanover County, VA, Henrico County, VA, Henry County, VA, Highland County, VA, Isle of Wight County, VA, James City County, VA, King and Queen County, VA, King George County, VA, King William County, VA, Lancaster County, VA, Loudoun County, VA, Louisa County, VA, Lunenburg County, VA, Madison County, VA, Mathews County, VA, Mecklenburg County, VA, Middlesex County, VA, Montgomery County, VA, Nelson County, VA, New Kent County, VA, Northampton County, VA, Northumberland County, VA, Nottoway County, VA, Orange County, VA, Page County, VA, Patrick County, VA, Pittsylvania County, VA, Powhatan County, VA, Prince Edward County, VA, Prince George County, VA, Prince William County, VA, Rappahannock County, VA, Richmond County, VA, Roanoke County, VA, Rockbridge County, VA, Rockingham County, VA, Shenandoah County, VA, Southampton County, VA, Spotsylvania County, VA, Stafford County, VA, Surry County, VA, Sussex County, VA, Warren County, VA, Westmoreland County, VA, York County, VA, Berkeley County, WV, Jefferson County, WV, Morgan County, WV

The radar

The Norfolk radar (KAKQ), 118 km from the middle of the area, began a volume at 18:05 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
60%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
80%
One or more gusts of 65 knots or more
5%
Ten or more severe hail reports
10%
One or more hailstones of 2 inches or more
5%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

38 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jun 10, 2:30 PM EDTFlash Flood WarningLWXFairfax, Prince William3 hr
Jun 10, 2:51 PM EDTFlash Flood WarningLWXBaltimore, City of Baltimore3 hr
Jun 10, 2:58 PM EDTFlash Flood WarningLWXArlington, Fairfax, City of Alexandria3 hr
Jun 10, 3:00 PM EDTSevere Thunderstorm WarningPHIKent, Sussex60 min
Jun 10, 3:15 PM EDTSevere Thunderstorm WarningRNKBedford, Botetourt45 min
Jun 10, 3:24 PM EDTTornado WarningLWXBaltimore, Harford36 min
Jun 10, 4:06 PM EDTFlash Flood WarningLWXHarford3 hr
Jun 10, 4:46 PM EDTTornado WarningPHINew Castle29 min
Jun 10, 4:55 PM EDTTornado WarningLWXFrederick, City of Winchester35 min
Jun 10, 5:13 PM EDTSevere Thunderstorm WarningRNKAppomattox, Campbell, Charlotte, Halifax, Pittsylvania47 min
Jun 10, 5:17 PM EDTSevere Thunderstorm WarningAKQAmelia, Cumberland, Nottoway, Prince Edward43 min
Jun 10, 5:22 PM EDTSevere Thunderstorm WarningLWXWashington23 min
Jun 10, 5:22 PM EDTTornado WarningAKQAmelia, Cumberland, Nottoway, Prince Edward38 min
Jun 10, 5:42 PM EDTSevere Thunderstorm WarningLWXFrederick, Washington48 min
Jun 10, 5:57 PM EDTSevere Thunderstorm WarningRNKAppomattox, Buckingham, Campbell, Charlotte48 min
Jun 10, 5:58 PM EDTTornado WarningAKQAmelia, Nottoway, Prince Edward32 min
Jun 10, 6:09 PM EDTSevere Thunderstorm WarningAKQCamden, Gates51 min
Jun 10, 6:14 PM EDTSevere Thunderstorm WarningAKQCumberland, Fluvanna, Goochland, Louisa46 min
Jun 10, 6:19 PM EDTTornado WarningAKQCamden, Gates26 min
Jun 10, 6:28 PM EDTTornado WarningAKQAmelia, Chesterfield, Powhatan32 min
Jun 10, 6:33 PM EDTSevere Thunderstorm WarningLWXCulpeper, Orange, Spotsylvania, Stafford, City of Fredericksburg42 min
Jun 10, 6:42 PM EDTTornado WarningAKQCity of Chesapeake, City of Suffolk33 min
Jun 10, 6:56 PM EDTTornado WarningLWXBaltimore, Carroll, Howard, Montgomery34 min
Jun 10, 7:13 PM EDTFlash Flood WarningLWXCarroll, Frederick, Howard, Montgomery3 hr
Jun 10, 7:14 PM EDTTornado WarningAKQCity of Chesapeake, City of Virginia Beach46 min
Jun 10, 7:24 PM EDTTornado WarningLWXBaltimore, Carroll36 min
Jun 10, 7:32 PM EDTFlash Flood WarningLWXFairfax, Prince William, City of Fairfax, City of Manassas, City of Manassas Park3 hr
Jun 10, 7:51 PM EDTSevere Thunderstorm WarningAKQCity of Chesapeake, City of Virginia Beach24 min
Jun 10, 7:53 PM EDTFlash Flood WarningLWXMontgomery, Prince George's3 hr
Jun 10, 7:57 PM EDTTornado WarningAKQCaroline, King and Queen, King William33 min
Jun 10, 8:04 PM EDTTornado WarningLWXBaltimore, Howard26 min
Jun 10, 8:15 PM EDTFlash Flood WarningLWXBaltimore, Howard, City of Baltimore3 hr
Jun 10, 8:33 PM EDTTornado WarningLWXCalvert, Charles, Prince George's27 min
Jun 10, 9:30 PM EDTTornado WarningLWXSaint Mary's30 min
Jun 10, 9:34 PM EDTFlash Flood WarningLWXAnne Arundel, Prince George's3 hr
Jun 10, 9:40 PM EDTFlash Flood WarningLWXHarford3 hr
Jun 10, 10:41 PM EDTTornado WarningAKQDorchester, Wicomico34 min
Jun 10, 11:00 PM EDTTornado WarningPHISussex30 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 6.0 hours before the alert went out and 139 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 12:00Z on 2013-06-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 9 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 12:00Z on 2013-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 171 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
9 J/kg
Mixed-layer CIN
-91 J/kg
Mixed-layer LCL
742 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
171 m²/s²
0-3 km storm-relative helicity
200 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

277 
WWUS20 KWNS 101809
SEL3  
SPC WW 101809
DCZ000-DEZ000-MDZ000-NCZ000-NJZ000-PAZ000-VAZ000-WVZ000-CWZ000-11020
0-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 293
NWS STORM PREDICTION CENTER NORMAN OK
200 PM EDT MON JUN 10 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  DISTRICT OF COLUMBIA
  DELAWARE
  MUCH OF MARYLAND
  NORTHERN NORTH CAROLINA
  SOUTHERN NEW JERSEY
  SOUTHEAST PENNSYLVANIA
  MUCH OF VIRGINIA
  THE EASTERN PANHANDLE OF WEST VIRGINIA
  COASTAL WATERS

* EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 200 PM UNTIL
  1000 PM EDT.

* PRIMARY THREATS INCLUDE...
  SEVERAL TORNADOES LIKELY
  NUMEROUS DAMAGING WIND GUSTS TO 70 MPH LIKELY

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 105 STATUTE
MILES EAST AND WEST OF A LINE FROM 40 MILES SOUTHWEST OF SOUTH
HILL VIRGINIA TO 30 MILES NORTHWEST OF WILMINGTON DELAWARE.  FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU3).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 292...

DISCUSSION...TSTMS EXPECTED TO DEVELOP/PERSIST THROUGH THIS EVE
ALONG THE NRN EXTENSIONS OF THE SAME THE CONFLUENCE AXES RESPONSIBLE
FOR STORMS NOW IN THE CAROLINAS. WHILE MID-LVL LAPSE RATES WILL
REMAIN MODEST...SFC HEATING AND FAIRLY RICH LOW-LVL MOISTURE SHOULD
YIELD SUFFICIENT BUOYANCY FOR SUSTAINED STORMS AND POSSIBLE
SUPERCELLS GIVEN STRENGTHENING MID-LVL FLOW /WITH SWLY 500 MB FLOW
AROUND 50 KTS/ AND ASCENT EXPECTED WITH THE CONTINUED EWD MOVEMENT
OF TN VLY UPR TROUGH. POTENTIAL FOR LOW-LVL MESOCYCLONES MAY BE
ENHANCED NEAR DIFFUSE WARM FRONT IN SE PA/NE MD/DE.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 23030.


...CORFIDI

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 10, 12:56 PM EDTMesoscale DiscussionSPCKent, New Castle, Sussex2 hr
Jun 10, 4:38 PM EDTMesoscale DiscussionSPCKent, New Castle, Sussex97 min
Jun 10, 6:49 PM EDTMesoscale DiscussionSPCAnne Arundel, Baltimore, Calvert, Caroline, Charles, Dorchester and 10 more86 min
Jun 10, 11:31 AM EDTMesoscale DiscussionSPCAnson, Cabarrus, Chatham, Cleveland, Cumberland, Davidson and 18 more119 min
Jun 10, 1:18 PM EDTTornado WatchSPCAlamance, Alexander, Anson, Bladen, Brunswick, Burke and 47 more9 hr
Jun 10, 4:03 PM EDTMesoscale DiscussionSPCAlamance, Anson, Chatham, Cumberland, Davidson, Durham and 20 more87 min
Jun 10, 5:47 PM EDTMesoscale DiscussionSPCBeaufort, Bertie, Brunswick, Chowan, Columbus, Craven and 14 more58 min
Jun 10, 6:27 PM EDTMesoscale DiscussionSPCGraham93 min
Jun 10, 7:20 PM EDTMesoscale DiscussionSPCBladen, Brunswick, Columbus, Craven, Cumberland, Duplin and 14 more85 min
Jun 10, 2:32 PM EDTMesoscale DiscussionSPCLee88 min
Jun 10, 3:02 PM EDTSevere Thunderstorm WatchSPCBuchanan, Dickenson, Lee, Russell, Scott, Washington and 3 more7 hr

Nearby

Tornado Watches in Virginia, 2013Tornado Watches in Maryland, 2013Tornado Watches in North Carolina, 2013Every tornado watch in 2013

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.