Alert archive / Virginia / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 176, NWS Baltimore/Washington

July 10, 2000Madison County, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Jul 10, 2000, 5:18 PM EDT for Madison County, Virginia. It was in force for 27 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jul 10, 2000, 5:18 PM EDT (21:18 UTC)
Expired
Jul 10, 2000, 5:45 PM EDT
In force
27 min
Issued by
NWS Baltimore/Washington
Area
Whole counties

County Madison County, VA

The radar

The Sterling radar (KLWX), 93 km from the middle of the area, began a volume at 21:18 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, 5:35 PM EDTThunderstorm WindLeon, VATrees 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, 12:30 PM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 9.3 hours before the alert went out and 97 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

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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, 1 hour 58 minutes earlier.

Area forecast discussion, Jul 10, 3:20 PM EDT, 1 hour 58 minutes 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, 5:21 PM EDTSevere Thunderstorm WarningLWXOrange, Spotsylvania39 min
Jul 10, 5:21 PM EDTSevere Thunderstorm WarningLWXCity of Fredericksburg39 min
Jul 10, 5:56 PM EDTSevere Thunderstorm WarningLWXKing George49 min
Jul 10, 6:02 PM EDTSevere Thunderstorm WarningLWXSpotsylvania, Stafford, City of Fredericksburg28 min
Jul 10, 5:57 PM EDTSevere Thunderstorm WarningLWXCharles, Prince George's48 min
Jul 10, 6:20 PM EDTSevere Thunderstorm WarningLWXCalvert, Saint Mary's40 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.