Alert archive / Virginia / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 93, NWS Baltimore/Washington

May 23, 2000Highland County, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at May 23, 2000, 8:14 PM EDT for Highland County, Virginia. It was in force for 31 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
May 23, 2000, 8:14 PM EDT (00:14 UTC)
Expired
May 23, 2000, 8:45 PM EDT
In force
31 min
Issued by
NWS Baltimore/Washington
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Highland County, VA

The watch it was issued in

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

IssuedProductOfficeLasted
May 23, 7:45 PM EDTTornado WatchSPC5 hr

The nearest sounding before it

Roanoke, VA (KRNK), launched 00:00Z, 0.2 hours before the alert went out and 122 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, Roanoke, VA at 00:00Z on 2000-05-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 191 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, Roanoke, VA at 00:00Z on 2000-05-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 111 square meters per square second.1939587897Sfc1 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
191 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
1048 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
111 m²/s²
0-3 km storm-relative helicity
135 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.9

Open this sounding in Storm Lab

The text

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

815 
WUUS51 KLWX 240014
SVRWBC
VAC091-240045-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON
814 PM EDT TUE MAY 23 2000

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HIGHLAND COUNTY IN WESTERN VIRGINIA

* UNTIL 845 PM EDT

* AT 813 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM WITH LARGE HAIL 3 MILES SOUTH OF MILL GAP...OR
  ABOUT 35 MILES WEST OF STAUNTON...MOVING EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
   MUSTOE AT 816 PM EDT
   CLOVER CREEK...WILLIAMSVILLE AT 830 PM EDT
   MCDOWELL AT 834 PM EDT
   LIBERTY AT 840 PM EDT

SEEK SAFETY INDOORS AWAY FROM WINDOWS. IF CAUGHT OUTSIDE...DO NOT
STAND UNDERNEATH TREES OR OTHER ISOLATED OBJECTS. DO NOT DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD.

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.

.END/ HTS

LAT...LON 3839 7976 3822 7982 3812 7946 3834 7937

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 May 23, 1:45 PM EDT, 6 hours 29 minutes earlier.

Area forecast discussion, May 23, 1:45 PM EDT, 6 hours 29 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
145 PM EDT TUE MAY 23 2000

AT 17Z...1ST WAVE OF SHRA OVER W CWA AND 2ND ROUND W OF MTNS. 1ST
BATCH LEFTOVER FROM MORNING CONVECTION W OF MTNS AND 2ND BATCH ASSOC
WITH SIG UL TROF/VORT. TROF WILL SWING ACROSS CWA 00Z-06Z AND VORT
WILL CROSS ALL BUT FAR S CWA. SIG VVEL GENERATED AT 700/500MB AND
LIS DROP TO -1 TO -2. SPC HAS SLIGHT RISK POSTED W OF APPALACHIAN
SPINE TONIGHT. EXPECT SCT SHRA AND TSRA ASSOC WITH FEATURE IN W OH
AND CENT KY TO REACH W CWA BY LATE AFT AND E CWA THIS EVE. PRECIP
SHUD COME TO AN END BEFORE MIDNIGHT.

SFC REFLECTION OF UL FEATURE IS PRE-FRONTAL TROF THAT WILL CROSS CWA
BEFORE 06Z. THIS WILL SHIFT WINDS W AND HELP DRY OUT AIR MASS. LLJET
OF 30-40KTS SETS UP OVERNIGHT WITH DOWNSLOPE FLOW AND SOUNDING PROGS
SHOW SIG DRYING IN MID TO UPPER LEVELS. ATMOS WILL DECOUPLE
OVERNIGHT SO WINDS WILL NOT BE ABLE TO MIX DOWN UNTIL TOM. EXPECT
SOME CLEARING AFTER PRE-FRONTAL TROF AND PTLY SUNNY SKIES WED
MORNING. MCS FCST TO DEVELOP OVER KY 06Z TONIGHT. ETA FCSTS
CONVECTION TO MOVE INTO SW VA 12Z AND REMANT CLDS INTO NC 18Z. NGM
TRACK SENDS REMNANTS TO SE VA 18Z. WILL NEED TO MONITOR TO SEE IF
CLDS WILL IMPACT CWA TOM MORN IMPACTING HEATING POTENTIAL FOR TSTM
DEVELOPMENT TOM AFT.

GOOD CHANCE OF SCT TSRA ALONG AND AHEAD OF COLD FRONT SWINGING
ACROSS CWA WED EVE. COND DONT LOOK AS IMPRESSIVE TOM AFT AS THEY
DID YEST BUT THERE ARE STILL SEVERAL FACTORS IN FAVOR INCLUDING
STRONG 250MB JET OVERHEAD...35KT LLJET WITH WAA...-2 TO -3 LIS...
TIMING OF FROPA...AND WEAK 500MB DIVERGENCE. BIGGEST NEGATIVE IS
LIMITED MOISTURE. SPC DAY2 OUTLOOK HAS CWA IN SLIGHT RISK. PRECIP
WILL END WED NIGHT AFTER FROPA AND NOT MUCH WIND SHIFT OR COLD AIR
BEHIND FRONT AS UPPER LEVEL FLOW TURNS ZONAL. EXPECT TEMPS
IN THE 80S THURS UNDER PTCLDY SKIES WITH BREEZY DOWNSLOPE FLOW.

LOOKING AHEAD...HI PRES BUILDS INTO CWA THU NITE AND FRI. LOW PRES
DEVELOPS OVER S PLAINS FRI AND PUSHES NEWARD. A WARM FRONT WILL
CROSS CWA SAT AND COLD FRONT WILL CROSS CWA SUN. PLANNING TO ADD
CHANCE SHRA/TSRA TO SAT NIGHT AND SUN FCST.

.LWX..NONE.

MMARGRAF

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.