Alert archive / Virginia / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 252, NWS Baltimore/Washington

August 9, 2000City of Alexandria, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Aug 9, 2000, 5:25 PM EDT for City of Alexandria, Virginia. It was in force for 65 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 9, 2000, 5:25 PM EDT (21:25 UTC)
Expired
Aug 9, 2000, 6:30 PM EDT
In force
65 min
Issued by
NWS Baltimore/Washington
Area
Whole counties

County City of Alexandria, VA

The radar

The Sterling radar (KLWX), 43 km from the middle of the area, began a volume at 21:29 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 9, 1:00 PM EDTSevere Thunderstorm WatchSPC6 hr
Aug 9, 5:00 PM EDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.4 hours before the alert went out and 35 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 2000-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 12:00Z on 2000-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1259 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
71 m²/s²
0-3 km storm-relative helicity
117 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.

000 
WUUS51 KLWX 092127
SVRWBC
DCC001-MDC017-031-033-VAC013-059-099-153-179-510-600-610-092230-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON
525 PM EDT WED AUG 9 2000

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DISTRICT OF COLUMBIA
  MONTGOMERY COUNTY IN CENTRAL MARYLAND
  PRINCE GEORGES COUNTY IN CENTRAL MARYLAND
  KING GEORGE COUNTY IN CENTRAL VIRGINIA
  ARLINGTON COUNTY IN NORTHERN VIRGINIA
  CITY OF ALEXANDRIA IN NORTHERN VIRGINIA
  CITY OF FAIRFAX IN NORTHERN VIRGINIA
  CITY OF FALLS CHURCH IN NORTHERN VIRGINIA
  FAIRFAX COUNTY IN NORTHERN VIRGINIA
  PRINCE WILLIAM COUNTY IN NORTHERN VIRGINIA
  STAFFORD COUNTY IN NORTHERN VIRGINIA
  CHARLES COUNTY IN SOUTHERN MARYLAND

* UNTIL 630 PM EDT

* AT 524 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM POOLESVILLE TO 14 MILES SOUTH OF
  STAFFORD...MOVING EAST AT 30 MPH.

* SEVERE THUNDERSTORMS WILL BE...
  OVER RESTON AT 528 PM
  OVER DALE CITY...DUMFRIES AT 530 PM
  OVER BOYDS AT 532 PM
  OVER FAIRFAX...QUANTICO AT 534 PM
  OVER VIENNA...BURKE AT 536 PM

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER
AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE
THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN
EXCESS OF 55 MPH...DEAD>LY LIGHTNING...AND VERY HEAVY RAIN.

AS THE STORM APPROACHES MOVE TO A PLACE OF SAFETY. TUNE INTO NOAA
WEATHER RADIO OR YOUR LOCAL RADIO OR TV STATION FOR THE LATEST
WEATHER INFORMATION.

The office that day

Everything else NWS Baltimore/Washington issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 9, 2:46 PM EDTSevere Thunderstorm WarningLWXAugusta, City of Staunton44 min
Aug 9, 2:46 PM EDTSevere Thunderstorm WarningLWXHighland44 min
Aug 9, 3:01 PM EDTSevere Thunderstorm WarningLWXPage, Rockingham, Shenandoah44 min
Aug 9, 3:01 PM EDTSevere Thunderstorm WarningLWXCity of Harrisonburg44 min
Aug 9, 3:24 PM EDTSevere Thunderstorm WarningLWXFrederick, Shenandoah, Warren66 min
Aug 9, 3:24 PM EDTSevere Thunderstorm WarningLWXCity of Winchester66 min
Aug 9, 3:44 PM EDTSevere Thunderstorm WarningLWXAlbemarle, City of Charlottesville46 min
Aug 9, 3:44 PM EDTSevere Thunderstorm WarningLWXGreene, Madison, Page, Rockingham46 min
Aug 9, 3:44 PM EDTSevere Thunderstorm WarningLWXAugusta, City of Staunton, City of Waynesboro46 min
Aug 9, 3:44 PM EDTSevere Thunderstorm WarningLWXCulpeper, Rappahannock46 min
Aug 9, 3:44 PM EDTSevere Thunderstorm WarningLWXCity of Harrisonburg46 min
Aug 9, 4:24 PM EDTSevere Thunderstorm WarningLWXClarke, Frederick66 min
Aug 9, 4:24 PM EDTSevere Thunderstorm WarningLWXFairfax, Loudoun, Prince William, City of Fairfax, City of Falls Church66 min
Aug 9, 4:24 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Stafford, Warren66 min
Aug 9, 4:24 PM EDTSevere Thunderstorm WarningLWXSpotsylvania, City of Fredericksburg66 min
Aug 9, 4:24 PM EDTSevere Thunderstorm WarningLWXOrange66 min
Aug 9, 4:24 PM EDTSevere Thunderstorm WarningLWXCity of Winchester66 min
Aug 9, 4:24 PM EDTSevere Thunderstorm WarningLWXCity of Manassas, City of Manassas Park66 min
Aug 9, 5:25 PM EDTSevere Thunderstorm WarningLWXKing George, Prince William, Stafford65 min
Aug 9, 5:25 PM EDTSevere Thunderstorm WarningLWXFairfax65 min
Aug 9, 5:25 PM EDTSevere Thunderstorm WarningLWXArlington65 min
Aug 9, 5:25 PM EDTSevere Thunderstorm WarningLWXCity of Fairfax65 min
Aug 9, 5:25 PM EDTSevere Thunderstorm WarningLWXCity of Falls Church65 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2000Every severe thunderstorm warning 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; radar from the NEXRAD Level II archive.