Severe Thunderstorm Warning 21, NWS Baltimore/Washington

Issued

Apr 23, 1999, 4:28 PM EDT (20:28 UTC)

Expired

Apr 23, 1999, 5:15 PM EDT

In force

47 min

Issued by

NWS Baltimore/Washington

Area

Whole counties

County City of Alexandria, VA

The Sterling radar (KLWX), 43 km from the middle of the area, began a volume at 20:30 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.

999 
WUUS1 KWBC 232027 RRA
SVRWBC
VAC059-510-600-610-683-685-232115-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
428 PM EDT FRI APR 23 1999

THE NATIONAL WEATHER SERVICE IN STERLING VA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CITY OF ALEXANDRIA IN NORTHERN VIRGINIA
  FAIRFAX COUNTY IN NORTHERN VIRGINIA
  CITY OF FAIRFAX IN NORTHERN VIRGINIA
  CITY OF FALLS CHURCH IN NORTHERN VIRGINIA
  CITY OF MANASSAS IN NORTHERN VIRGINIA
  CITY OF MANASSAS PARK IN NORTHERN VIRGINIA

* UNTIL 515 PM EDT.

* AT 426 PM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR AND SKYWARN
  SPOTTERS INDICATED A SEVERE THUNDERSTORM WITH DAMAGING WINDS AND
  LARGE HAIL 3 MILES NORTH OF CHANTILLY... MOVING EAST AT 55 MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT...
  CHANTILLY
  RESTON
  OAKTON
  FAIRFAX CITY
  TYSONS CORNER
  BURKE
  FALLS CHURCH
  ANNANDALE
  SPRINGFIELD
  ALEXANDRIA
  GROVETON
  MOUNT VERNON

THIS STORM HAS A HISTORY OF LARGE HAIL.

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

STAY TUNED TO TV...RADIO AND NOAA WEATHER RADIO FOR UPDATES AND
WARNINGS.

.END/

BMW/HTS

NWS Baltimore/Washington wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 23, 2:20 PM EDT, 2 hours 8 minutes earlier.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
220 PM EDT FRI APR 23 1999

DUE TO TIMING OF SVR WX I HAD ALREADY DRAFTED A SET OF EVENG WRK
ZNS...WHICH HAD TO BE TRANSMITTED WITHOUT GETTING TO LOOK AT 12Z
GUIDANCE DUE TO COMPUTER FAILURES AT NCEP. AND THEN THE SVR WX
STARTED AND BOX WAS ISSUED. AS A RESULT...VERSION 1.0 OF EVENG PCKG WAS
RELEASED AT 145 PM. I THINK YOU ALL EXPECT HIGH PRES TO BUILD OVER THE
AREA AFTR THIS FNT MOVES THROUGH...TEMPS TO BE COOL OVER THE WKND AND
BRZY. IF I GET A CHC TO LOOK AT 12Z MDLS ILL UPDATE IF THINGS HAVE
CHGD.

.LWX...SVR TSTM WATCH WRN MD..ERN PANHANDLE WV...XTRM NWRN VA TIL 7 PM.

WOODY

In the hours before

VAZ021-025>031-036>042-050>057-MDZ002>007-009>011-013>014-016>018-
WVZ048>055-240200-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
135 PM EDT FRI APR 23 1999

SEVERE THUNDERSTORMS MAY OCCUR OVER THE EASTERN WEST VIRGINIA
PANHANDLE...NORTHERN VIRGINIA AND MARYLAND LATER THIS AFTERNOON AND
EARLY THIS EVENING.

A COLD FRONT OVER OHIO WILL MOVE INTO MARYLAND LATER THIS AFTERNOON
AND CONTINUE SOUTHWARD THROUGH VIRGINIA THIS EVENING. AN AREA OF
STRONG THUNDERSTORMS HAS MOVED INTO SOUTHWESTERN PENNSYLVANIA... AND
IS EXPECTED TO CONTINUE INTO WESTERN MARYLAND BY MID AFTERNOON.
SOME OF THESE THUNDERSTORMS MAY PRODUCE HAIL IN EXCESS OF 3/4 INCHES
IN DIAMETER...AND WIND GUSTS IN EXCESS OF 55 MPH

SHOWERS AND THUNDERSTORMS WILL END THIS EVENING AFTER THE FRONT MOVES
SOUTH OF THE AREA.

THE NATIONAL WEATHER SERVICE WILL CONTINUE TO PROVIDE FREQUENT
UPDATES THROUGH TIMELY STATEMENTS...NOAA WEATHER RADIO ANDZ OUR
WORLD WIDE WEB SITE AT HTTP://WWW.NWS.NOAA.GOV/ER/LWX/

WOODCOCK

Severe Thunderstorm Warnings in Virginia, 1999Every severe thunderstorm warning in 1999

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.