Alert archive / Virginia / Tornado Watches in 2002

Tornado Watch 758

November 11, 20024 states

The Storm Prediction Center issued this tornado watch at Nov 11, 2002, 5:05 AM EST for 4 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Nov 11, 2002, 5:05 AM EST (10:05 UTC)
Expired: Nov 11, 2002, 11:00 AM EST
In force: 6 hr
Issued by: the Storm Prediction Center

All 60 counties

New Castle County, DE, Anne Arundel County, MD, Baltimore County, MD, Calvert County, MD, Caroline County, MD, Cecil County, MD, Charles County, MD, City of Baltimore, MD, Dorchester County, MD, Harford County, MD, Howard County, MD, Kent County, MD, Prince George's County, MD, Queen Anne's County, MD, Saint Mary's County, MD, Talbot County, MD, Salem County, NJ, Amelia County, VA, Arlington County, VA, Brunswick County, VA, Caroline County, VA, Charles City County, VA, Chesterfield County, VA, City of Alexandria, VA, City of Colonial Heights, VA, City of Emporia, VA, City of Fairfax, VA, City of Falls Church, VA, City of Fredericksburg, VA, City of Hopewell, VA, City of Petersburg, VA, City of Richmond, VA, City of Williamsburg, VA, Dinwiddie County, VA, Essex County, VA, Fairfax County, VA, Goochland County, VA, Greensville County, VA, Hanover County, VA, Henrico County, VA, James City County, VA, King and Queen County, VA, King George County, VA, King William County, VA, Lancaster County, VA, Lunenburg County, VA, Mecklenburg County, VA, Middlesex County, VA, New Kent County, VA, Northumberland County, VA, Nottoway County, VA, Powhatan County, VA, Prince George County, VA, Richmond County, VA, Southampton County, VA, Spotsylvania County, VA, Stafford County, VA, Surry County, VA, Sussex County, VA, Westmoreland County, VA

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Nov 11, 5:54 AM EST	Tornado Warning	LWX	Arlington, Fairfax, City of Alexandria, City of Fairfax, City of Falls Church	36 min
Nov 11, 6:05 AM EST	Severe Thunderstorm Warning	LWX	Prince William, Stafford	40 min
Nov 11, 6:17 AM EST	Severe Thunderstorm Warning	AKQ	Cumberland, Goochland	18 min
Nov 11, 6:48 AM EST	Severe Thunderstorm Warning	AKQ	Caroline, Goochland, Hanover	27 min
Nov 11, 6:58 AM EST	Tornado Warning	LWX	Charles	32 min
Nov 11, 6:58 AM EST	Tornado Warning	LWX	Charles	32 min
Nov 11, 7:56 AM EST	Severe Thunderstorm Warning	PHI	Queen Anne's, Talbot	49 min
Nov 11, 8:26 AM EST	Tornado Warning	AKQ	Caroline, Hanover	29 min
Nov 11, 8:54 AM EST	Severe Thunderstorm Warning	LWX	Charles, Saint Mary's	51 min
Nov 11, 8:54 AM EST	Severe Thunderstorm Warning	LWX	King George	51 min

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 10.1 hours before the alert went out and 125 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 81 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 717 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 369 m²/s²
0-3 km storm-relative helicity: 459 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 111007
SEL8  
SPC WW 111005
DCZ000-DEZ000-MDZ000-VAZ000-111600-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 758
STORM PREDICTION CENTER NORMAN OK
505 AM EST MON NOV 11 2002

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

   DISTRICT OF COLUMBIA
   MUCH OF DELAWARE                           
   MUCH OF CENTRAL AND EASTERN MARYLAND                           
   CENTRAL AND EASTERN VIRGINIA                           

EFFECTIVE THIS MONDAY MORNING FROM 505 AM UNTIL 1100 AM EST.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 45 STATUTE MILES EAST AND WEST
OF A LINE FROM 65 MILES SOUTH SOUTHWEST OF RICHMOND VIRGINIA TO 45
MILES NORTHEAST OF BALTIMORE MARYLAND.

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 755...WW 756...WW 757...

DISCUSSION...APPEARS SMALL LINES AND ISOLATED SUPERCELLS WILL
DEVELOP/SPREAD ENEWD THROUGH THE MID MORNING ACROSS NRN/CENTRAL VA
INTO THE DELMARVA REGION...GIVEN SUFFICIENT LARGE SCALE ASCENT
APPROACHING THE REGION.  VERY STRONG LOW LEVEL SHEAR AND SUFFICIENT
INSTABILITY WILL LIKEWISE SUSTAIN A THREAT OF ISOLATED TORNADOES
AND WIND DAMAGE.


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. 
MEAN STORM MOTION VECTOR 25040.


...EVANS

363,0783 393,0765 393,0751 363,0765

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 10, 10:45 PM EST	Tornado Watch	SPC	Garrett	5 hr
Nov 11, 11:00 AM EST	Tornado Watch	SPC	Saint Mary's, Somerset, Wicomico, Worcester	4 hr
Nov 11, 1:10 AM EST	Tornado Watch	SPC	Albemarle, Alleghany, Amherst, Appomattox, Bedford, Bland and 31 more	6 hr
Nov 11, 6:35 AM EST	Tornado Watch	SPC	City of Danville	4 hr

Nearby

Tornado Watches in Virginia, 2002 Tornado Watches in Maryland, 2002 Tornado Watches in Delaware, 2002 Every tornado watch in 2002

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.