Alert archive / Virginia / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 161, NWS Baltimore/Washington

June 27, 2000King George County, Stafford County, Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 27, 2000, 4:19 PM EDT for King George County, Stafford County, Virginia. It was in force for 41 min. 2 reports 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: Jun 27, 2000, 4:19 PM EDT (20:19 UTC)
Expired: Jun 27, 2000, 5:00 PM EDT
In force: 41 min
Issued by: NWS Baltimore/Washington
Area: Whole counties

Counties King George County, VA, Stafford County, VA

The radar

The Sterling radar (KLWX), 72 km from the middle of the area, began a volume at 20:19 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

Time	Report	Where	Remark
Jun 27, 4:45 PM EDT	Thunderstorm Wind	Countywide, VA	A power line was downed.
Jun 27, 4:45 PM EDT	Thunderstorm Wind	Countywide, VA	Trees were downed onto roads.

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.

Issued	Product	Office	Lasted
Jun 27, 3:00 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 8.3 hours before the alert went out and 67 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: 111 J/kg
Mixed-layer CIN: -163 J/kg
Mixed-layer LCL: 1402 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 74 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 Jun 27, 2:15 PM EDT, 2 hours 4 minutes earlier.

Area forecast discussion, Jun 27, 2:15 PM EDT, 2 hours 4 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
215 PM EDT TUE JUN 27 2000

GOING INTO A CLOUDY AND OCNL WET PERIOD. UPR LVL TROF ADVANCES
EWD TO THE ERN US AND H5 RDG OFF THE ATLC COAST MOVES FURTHER EWD
NXT 48 TO 60 HRS. MEANWHILE AT THE SFC...CDFNT WL PUSH INTO THE AREA
TNGT BUT THEN STALL OVR THE CWA WED THRU THU AS UPR LVL FLO BACKS IN
RESPONSE TO H5 HGT FALLS TO OUR W AS MORE ENERGY DIVES INTO THE BASE
OF THE UPR LVL TROF. SERIES OF SHRTWVS COMING OUT OF THE BASE OF THE
TROF WL RESULT IN SFC WAVES DVLPG ALONG THE WAVY FRONT OVR THE AREA
LATE WED INTO THU AND POSSIBLY INTO FRI.

NGM/AVN AND ETA ALL OFFER DIFFERING SOLUTIONS ON TIMING OF SFC WAVES UP
AND ALONG THE WAVY FRONT. MODELS OFTEN HAVE DIFFICULTY IN TIMING SUCH
SYSTEMS IN AND OUT OF THE AREA IN SUCH A PATTERN. DISPARITY IS SEEN IN
THE NGM/AVN POP AND QPF FIELDS. WL LEAVE POPS OUT (HIDDEN 20) FAR NW ZNS ON
WED WHERE I THINK SOME DRIER AIR MAY TEMPORARILY MOVE INTO THAT AREA.
OTHERWISE...I AM ONLY CONFIDENT ENUF TO GO WITH CHC POPS 1ST THRU 4TH
PDS.

FRONT HANGS AROUND INTO FRI SO WILL KEEP THE CHC POPS IN THE FCST. BY
SAT/SUN...MRF INDICATES THE ERN US TROF WL MOVE EWD AND H5 RDG WL BUILD
IN FROM THE WEST. THIS SHUD CAUSE THE FRONTAL BOUNDARY OVR THE AREA TO
MOVE OFFSHR. THUS...AFTER A WEEK FILLED WITH LOTS OF CLOUDS AND SHRA/TSRA
THERE IS STILL HOPE FOR A SUNNY WEEKEND.

FCSTID = 15
DCA   68  83  F70  77 /  50  40  50  50
BWI   68  82  70  77 /  50  40  50  50
MRB   63  82  64  76 /  50  20  50  50

.LWX...
DC...NONE.
MD...NONE.
VA...NONE.
WV...NONE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 27, 2:40 PM EDT	Severe Thunderstorm Warning	LWX	Greene, Madison	50 min
Jun 27, 3:08 PM EDT	Severe Thunderstorm Warning	LWX	Culpeper, Orange	67 min
Jun 27, 3:15 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, City of Charlottesville	45 min
Jun 27, 3:35 PM EDT	Severe Thunderstorm Warning	LWX	Fauquier, Rappahannock	40 min
Jun 27, 3:45 PM EDT	Severe Thunderstorm Warning	LWX	Spotsylvania	45 min
Jun 27, 3:57 PM EDT	Flash Flood Warning	LWX	Albemarle, City of Charlottesville	2 hr
Jun 27, 4:19 PM EDT	Severe Thunderstorm Warning	LWX	City of Fredericksburg	41 min
Jun 27, 4:32 PM EDT	Severe Thunderstorm Warning	LWX	Spotsylvania	43 min
Jun 27, 4:35 PM EDT	Severe Thunderstorm Warning	LWX	Charles	40 min
Jun 27, 6:06 PM EDT	Severe Thunderstorm Warning	LWX	Saint Mary's	39 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.