Severe Thunderstorm Warning 76, NWS Baltimore/Washington

Issued

May 13, 2000, 6:30 PM EDT (22:30 UTC)

Expired

May 13, 2000, 7:00 PM EDT

In force

30 min

Issued by

NWS Baltimore/Washington

Area

Whole counties; the outline is the Mesonet’s reconstruction

Counties City of Fairfax, VA, Fairfax County, VA

The Sterling radar (KLWX), 22 km from the middle of the area, began a volume at 22:31 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.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

285 
WUUS51 KLWX 132231
SVRWBC
VAC059-153-600-683-685-132300-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON
ISSUED BY NATIONAL WEATHER SERVICE WAKEFIELD VA
630 PM EDT SAT MAY 13 2000

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CITY OF FAIRFAX IN NORTHERN VIRGINIA
  CITY OF MANASSAS IN NORTHERN VIRGINIA
  CITY OF MANASSAS PARK IN NORTHERN VIRGINIA
  FAIRFAX COUNTY IN NORTHERN VIRGINIA
  PRINCE WILLIAM COUNTY IN NORTHERN VIRGINIA

* UNTIL 700 PM EDT

* AT 630 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES NORTHWEST OF NOKESVILLE...MOVING EAST
  AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR
  LOCH LOMOND AT 630 PM EDT
  CENTREVILLE AND MANASSAS PARK AT 635 PM EDT
  CENTREVILLE AND CLIFTON AT 640 PM EDT
  FAIRFAX STATION AND JERMANTOWN AT 645 PM EDT
  BURKE AND FAIRFAX AT 650 PM EDT
  LORTON AND MERRIFIELD AT 655 PM EDT

THE SEVERE THUNDERSTORM IS CAPABLE OF PRODUCING
  DAMAGING HAIL UP TO THE SIZE OF GOLFBALLS.
  DAMAGING WINDS GREATER THAN 60 MILES AN HOUR.
  VERY HEAVY RAINFALL...WHICH MAY CAUSE LOCALIZED FLOODING.
  VERY FREQUENT AND DEADLY CLOUD-TO-GROUND LIGHTNING.

THE STORM HAS A HISTORY OF PRODUCING DAMAGING WINDS AND LARGE HAIL.
HEAVY RAINS FLOOD ROADS QUICKLY...SO DO NOT DRIVE INTO AREAS WHERE
WATER COVERS THE ROAD.

LAT...LON 3882 7764 3865 7760 3869 7719 3890 7722

$$

HESS

NWS Baltimore/Washington wrote its last area forecast discussion before this severe thunderstorm warning went out at May 13, 2:40 PM EDT, 3 hours 50 minutes earlier.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
240 PM EDT SAT MAY 13 2000

...SHORT TERM...

AT 18Z...WK BNDRY DRAPED OVR THE NE ZNS SLOWLY MOVING NEWD IN RESPONSE
TO SW FLO AHEAD OF APPROACHING CDFNT. S OF THE BNDRY...OVER MUCH OF
THE CWA...ATMS IS VERY UNSTABLE WITH LIS AROUND -10...CAPES OF 3500 TO
4500...AND DWPTS IN THE 70S. ATMS ALSO BEGINNING TO DESTABILIZE OVR NE
ZNS AS BNDRY MVS NWD. OLD OUTFLOW BNDRY OVR WRN ZNS NOW ACTING AS A
FOCUS FOR REDVLPMT OF CNVCTN. EXPECT PREFRONTAL CNVCTN TO INTENSIFY AND
MV EWD DURING THE REST OF THE AFTRN. MAIN THREAT WL BE LARGE HAIL AND
SPOTTY DAMAGING WINDS. NOT A LOT OF DIRECTIONAL SHEAR TO SUPPORT
TORNADOES. HWVR...CELLS THAT FORM AT THE INTERSECTION OF THE
APPROACHING BNDRY WITH THE OLD BNDRY DRAPED OVR THE NE ZNS WL HAVE TO
BE WATCHED CLOSELY. WATCHBOX OUT.

CDFNT PUSHES E OF THE CWA BY 03Z. WL KEEP A RMDNR OF AFT PD E OF THE
BLUE RDG AND KEEP TSRA GOING IN OUR SE COUNTIES INTO THE EARLY OVRNGT
PD.

...LONG TERM...

LONGWAVE TROF SETS UP OVR ERN PTN OF THE NATION SUN THRU MON. AT THE
SFC...HI PRES BUILDS OVR THE AREA...BUT SLIPS OFFSHR MON. A VORT MAX
ROTATING AROUND THE UPR LVL TROF WL SEND ANOTHER WK BNDRY THRU THE AREA
LATE MON.

FCST WL BE SUNNY SUN AND CLR SUN NGT. AVN AND ETA HINT AT SOME CLNDS ON
MON AS WE GET RETURN FLOW AROUND THE DEPARTING SFC HI AND THE WEAK
FRONT APPROACHES FROM THE NW. WL GO P/S 4TH PD.

DWPTS FCSTD TO FALL INTO THE LWR 40S SUN THRU MON RESULTING IN LOW
HUMIDITY. FOR TEMPS...AVN AND NGM MOS WITHIN A FEW DEG OF ONE ANOTHER
WITH THE AVN LEANING ON THE COOL SIDE. WENT WITH A BLEND OF THE AVN AND
NGM MOS 2ND & 4TH PDS.  WENT SLIGHTLY BELOW GUIDANCE 3RD PD AS SKC
ALONG WITH LGT WINDS WL RESULT IN GOOD RADIATIONAL COOLING.

BEYOND 4TH PD...HIGH PRES BUILDS INTO THE AREA TUE & WED WITH NEAR
NORMAL TEMPS AND LOW HUMIDITY. COULD SEE SOME CLOUDINESS RETURN THU AS
SFC HI SLIPS OFFSHR AND WMFNT APPROACHES FM THE W.

.LWX...NONE.

Severe Thunderstorm Warnings in Virginia, 2000Every severe thunderstorm warning in 2000

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