Alert archive / Virginia / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 178, NWS Baltimore/Washington

July 10, 2000City of Fredericksburg, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Jul 10, 2000, 5:21 PM EDT for City of Fredericksburg, Virginia. It was in force for 39 min. 1 report came from 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, with what was reported inside it.

The facts

Issued
Jul 10, 2000, 5:21 PM EDT (21:21 UTC)
Expired
Jul 10, 2000, 6:00 PM EDT
In force
39 min
Issued by
NWS Baltimore/Washington
Area
Whole counties; the outline is the Mesonet’s reconstruction

County City of Fredericksburg, VA

The radar

The Sterling radar (KLWX), 81 km from the middle of the area, began a volume at 21:23 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.

What was reported inside it

TimeReportWhereRemark
Jul 10, 6:10 PM EDTThunderstorm WindFredericksburg, VATwo trees were downed.

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.

The watch it was issued in

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

IssuedProductOfficeLasted
Jul 10, 4:30 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.4 hours before the alert went out and 79 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 2000-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 56 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, Washington/Dulle, VA at 12:00Z on 2000-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 178 square meters per square second.193958Sfc1 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
56 J/kg
Mixed-layer CIN
-108 J/kg
Mixed-layer LCL
1575 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
178 m²/s²
0-3 km storm-relative helicity
182 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.

361 
WUUS51 KLWX 102121
SVRWBC
VAC137-177-630-102200-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON
521 PM EDT MON JUL 10 2000

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CITY OF FREDERICKSBURG IN CENTRAL VIRGINIA
  ORANGE COUNTY IN CENTRAL VIRGINIA
  SPOTSYLVANIA COUNTY IN CENTRAL VIRGINIA

* UNTIL 600 PM EDT

* AT 513 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 22 MILES WEST OF FREDERICKSBURG...MOVING
  SOUTHEAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  6 MILES SOUTHWEST OF FREDERICKSBURG AT 544 PM
  OVER MASSAPONAX AT 546 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.

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 3844 7786 3828 7796 3795 7723 3817 7709

DMW/HTS

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 Jul 10, 3:20 PM EDT, 2 hours 1 minute earlier.

Area forecast discussion, Jul 10, 3:20 PM EDT, 2 hours 1 minute before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
320 PM EDT MON JUL 10 2000

TWO WTCH BOXES OUT IN THE WRN HALF OF OUR CWA..AND WL NOT BE
SURPRISED IF MORE WL BE ISSUED B4 THE EVENG IS OUT. AFTERWARDS
CONTINUING A CHC OF PCPN THROUGH THE MRNG ON TUE AS FNT PUSHES
SWD...THEN MORE VERY COMFORTABLE MID SUMMER WX WL RETURN AS UPR LVL
TRAJECTORY BRINGS US ANOTHER AIR MASS FM THE NW. WED AND THURS LOOK
TO BE VERY NICE DAYS. AS BNDRY STALLS TO THE S AND WVS FORM ALONG IT
I'M BRINGING THE CHC OF PCPN BACK TO THE SRN PART OF THE AREA ON
FRI...AND THE ERN HALF OF THE AREA ON SAT. MRF WANTS TO DVLP A WK
CLOSED LOW E OF THE CST FOR SAT...THIS WOULD KEEP E/NE FLOW OVR THE
AREA AND DAYTIME HIGHS IN THE LM 80S.

WOODY!
DCA   70  85  66  84 /  40  30  10  20
BWI   70  85  66  84 /  40  30  10  20
MRB   69  83  60  82 /  40  20  10  10

.LWX...
    SEVERE THUNDERSTORM WATCH THROUGH 6 PM...
    MDZ002-003-VAZ026>031-WVZ048>055-VAZ039>042-050-051-
    SEVERE THUNDERSTORM WATCH THROUGH 8 PM...
    VAZ036>038-021-025-

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 4:18 PM EDTSevere Thunderstorm WarningLWXShenandoah, Warren27 min
Jul 10, 4:25 PM EDTSevere Thunderstorm WarningLWXPage, Rappahannock50 min
Jul 10, 4:36 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier39 min
Jul 10, 5:09 PM EDTSevere Thunderstorm WarningLWXCulpeper, Fauquier, Stafford51 min
Jul 10, 5:09 PM EDTSevere Thunderstorm WarningLWXPrince William, City of Manassas, City of Manassas Park51 min
Jul 10, 5:18 PM EDTSevere Thunderstorm WarningLWXMadison27 min
Jul 10, 5:21 PM EDTSevere Thunderstorm WarningLWXOrange, Spotsylvania39 min
Jul 10, 5:56 PM EDTSevere Thunderstorm WarningLWXKing George49 min
Jul 10, 6:02 PM EDTSevere Thunderstorm WarningLWXSpotsylvania, Stafford, City of Fredericksburg28 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.