Alert archive / Virginia / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 129, NWS Baltimore/Washington

June 15, 2000City of Alexandria, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 15, 2000, 7:34 PM EDT for City of Alexandria, Virginia. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Jun 15, 2000, 7:34 PM EDT (23:34 UTC)
Expired: Jun 15, 2000, 8:15 PM EDT
In force: 41 min
Issued by: NWS Baltimore/Washington
Area: Whole counties; the outline is the Mesonet’s reconstruction

County City of Alexandria, VA

The radar

The Sterling radar (KLWX), 42 km from the middle of the area, began a volume at 23:35 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.

Issued	Product	Office	Lasted
Jun 15, 2:15 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.6 hours before the alert went out and 34 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: 59 J/kg
Mixed-layer CIN: -184 J/kg
Mixed-layer LCL: 598 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 91 m²/s²
0-3 km storm-relative helicity: 103 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.

138 
WUUS51 KLWX 152335
SVRWBC
DCC001-MDC031-033-VAC013-510-160015-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON
734 PM EDT THU JUN 15 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
  ARLINGTON COUNTY IN NORTHERN VIRGINIA
  CITY OF ALEXANDRIA IN NORTHERN VIRGINIA

* UNTIL 815 PM EDT

* AT 725 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 11 MILES WEST OF BALLSTON...MOVING EAST AT 35
  MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  OVER AMERICAN UNIVERSITY...3 MILES SOUTH OF BETHESDA AT 742 PM
  2 MILES NORTH OF GEORGETOWN AT 744 PM
  2 MILES NORTH OF ADAMS MORGAN AT 746 PM
  OVER TAKOMA PARK AT 750 PM
  2 MILES SOUTH OF LANGLEY PARK AT 752 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...DEADLY LIGHTNING...AND VERY HEAVY RAIN.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

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.

LAT...LON 3900 7724 3877 7712 3878 7671 3909 7674

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Baltimore/Washington wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 15, 2:35 PM EDT, 4 hours 59 minutes earlier.

Area forecast discussion, Jun 15, 2:35 PM EDT, 4 hours 59 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
235 PM EDT THU JUN 15 2000

REAL BUSY...AND RUNNING LATE

INSTAB AXIS TO CROSS AREA TAFTN/EVE...COVERED BY WATCHES AS APPRO.
WUD XPCT FG TO RDVLP TNGT IN SOUPY AMS. DONT SEE GOOD TRIGGER
TMRW/TMRW NGT...AND WL KEEP POPS OUT. S/WV/CDFNT APPRCHG AREA SAT WL
SPARK NXT CHC.  TEMP FCST WL SMWHT RFLCT PERSISTENCE...90ISH BY
DAY/ARND 70 BY NGT.

WL DO BEST TO GET ZFP OUT BY 4PM.

.LWX...
DC...SVR TSTM WATCH TIL 8PM.
MD...SVR TSTM WATCH TIL 6PM MDZ002 AND TIL 8PM 003>007-009-011-013-014.
VA...SVR TSTM WATCH TIL 7PM VAZ021-025-026-036-037 AND TIL 8PM NRN
SHEN VLY/DC METRO.
WV...SVR TSTM WATCH TIL 6PM WVZ048>050-054-055 AND TIL 8PM 051-053.

HTS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 15, 2:16 PM EDT	Severe Thunderstorm Warning	LWX	Frederick	44 min
Jun 15, 4:44 PM EDT	Severe Thunderstorm Warning	LWX	Clarke, Loudoun	46 min
Jun 15, 5:12 PM EDT	Severe Thunderstorm Warning	LWX	Loudoun	48 min
Jun 15, 5:31 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, City of Winchester	44 min
Jun 15, 5:31 PM EDT	Severe Thunderstorm Warning	LWX	Shenandoah	44 min
Jun 15, 6:19 PM EDT	Severe Thunderstorm Warning	LWX	Clarke, Fauquier, Loudoun	41 min
Jun 15, 6:19 PM EDT	Severe Thunderstorm Warning	LWX	Frederick, City of Winchester	41 min
Jun 15, 6:19 PM EDT	Severe Thunderstorm Warning	LWX	Warren	41 min
Jun 15, 6:42 PM EDT	Tornado Warning	LWX	Clarke, Fauquier, Loudoun	33 min
Jun 15, 7:10 PM EDT	Severe Thunderstorm Warning	LWX	Fairfax, Loudoun, City of Fairfax, City of Falls Church	50 min
Jun 15, 7:22 PM EDT	Tornado Warning	LWX	Loudoun	23 min
Jun 15, 7:22 PM EDT	Tornado Warning	LWX	Fairfax, City of Falls Church	23 min
Jun 15, 7:22 PM EDT	Tornado Warning	LWX	City of Fairfax	23 min
Jun 15, 7:34 PM EDT	Severe Thunderstorm Warning	LWX	Arlington	41 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2000 Every 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.