Alert archive / Virginia / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 412

June 2, 20004 states

The Storm Prediction Center issued this severe thunderstorm watch at Jun 2, 2000, 7:45 PM EDT for 4 states. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Jun 2, 2000, 7:45 PM EDT (23:45 UTC)
Expired
Jun 3, 2000, 12:00 AM EDT
In force
4 hr
Issued by
the Storm Prediction Center
All 28 counties

Kent County, DE, Sussex County, DE, Calvert County, MD, Caroline County, MD, Charles County, MD, Dorchester County, MD, Queen Anne's County, MD, Saint Mary's County, MD, Somerset County, MD, Talbot County, MD, Wicomico County, MD, Atlantic County, NJ, Cape May County, NJ, Cumberland County, NJ, Caroline County, VA, Chesterfield County, VA, City of Fredericksburg, VA, City of Richmond, VA, Essex County, VA, Hanover County, VA, King and Queen County, VA, King George County, VA, King William County, VA, Northumberland County, VA, Richmond County, VA, Spotsylvania County, VA, Stafford County, VA, Westmoreland County, VA

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 2, 7:54 PM EDTSevere Thunderstorm WarningPHITalbot36 min
Jun 2, 7:59 PM EDTSevere Thunderstorm WarningLWXAnne Arundel, Calvert, Prince George's46 min
Jun 2, 8:06 PM EDTSevere Thunderstorm WarningLWXCharles39 min
Jun 2, 8:12 PM EDTSevere Thunderstorm WarningLWXStafford48 min
Jun 2, 8:29 PM EDTSevere Thunderstorm WarningPHICaroline, Talbot31 min
Jun 2, 8:36 PM EDTSevere Thunderstorm WarningLWXCalvert, Charles, Saint Mary's39 min
Jun 2, 8:41 PM EDTSevere Thunderstorm WarningPHIKent, Sussex49 min
Jun 2, 9:03 PM EDTSevere Thunderstorm WarningLWXKing George42 min
Jun 2, 9:24 PM EDTSevere Thunderstorm WarningPHISussex21 min
Jun 2, 9:32 PM EDTSevere Thunderstorm WarningAKQWestmoreland28 min
Jun 2, 10:00 PM EDTSevere Thunderstorm WarningAKQWestmoreland30 min

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.8 hours before the alert went out and 96 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 2000-06-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 395 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 2000-06-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 161 square meters per square second.1939Sfc1 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
395 J/kg
Mixed-layer CIN
-233 J/kg
Mixed-layer LCL
1375 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
161 m²/s²
0-3 km storm-relative helicity
164 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.

312 
WWUS9 KMKC 022309
SEL2  

SEL2  
MKC WW 022309
DEZ000-MDZ000-NJZ000-VAZ000-CWZ000-030400-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 412
STORM PREDICTION CENTER NORMAN OK
709 PM EDT FRI JUN 2 2000

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   SOUTHERN DELAWARE                           
   MARYLAND                           
   SOUTHERN NEW JERSEY                         
   EASTERN VIRGINIA                           
   CHESAPEAKE BAY    
   COASTAL WATERS                     

EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 745 PM UNTIL
MIDNIGHT EDT.

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

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 40 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 35 MILES NORTHWEST OF RICHMOND
VIRGINIA TO 50 MILES EAST OF DOVER DELAWARE.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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 408...WW 409...WW
410...WW 411...

DISCUSSION...SEVERE THUNDERSTORMS HAVE DEVELOPED ACROSS DC ON LOW
LEVEL SURFACE TROUGH.  VERY UNSTABLE AIRMASS IN PLACE OVER ERN VA
WITH CAPES APPROACHING 5000 J/KG.  STORMS WILL PROPAGATE SEWD INTO
THIS AIRMASS...WITH SHEAR PROFILES SUFFICIENT GIVEN AMOUNT OF
INSTABILITY TO SUPPORT ISOLATED SUPERCELLS...ENHANCING WIND AND
HAIL THREAT.


AVIATION...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 550.  MEAN STORM
MOTION VECTOR 29020.


...HALES

383,0743 371,0774 382,0774 394,0743

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 2, 7:00 PM EDTSevere Thunderstorm WatchSPCNew Castle5 hr
Jun 2, 5:15 PM EDTSevere Thunderstorm WatchSPCAllegany, Garrett, Washington5 hr
Jun 2, 3:15 PM EDTSevere Thunderstorm WatchSPCBergen, Essex, Hudson, Union6 hr

Nearby

Severe Thunderstorm Watches in Virginia, 2000Severe Thunderstorm Watches in Maryland, 2000Severe Thunderstorm Watches in New Jersey, 2000Every severe thunderstorm watch in 2000

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.