Alert archive / West Virginia / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 64, NWS Baltimore/Washington

June 12, 2001Jefferson County, West Virginia

NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 12, 2001, 6:25 PM EDT for Jefferson County, West Virginia. It was in force for 35 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: Jun 12, 2001, 6:25 PM EDT (22:25 UTC)
Expired: Jun 12, 2001, 7:00 PM EDT
In force: 35 min
Issued by: NWS Baltimore/Washington
Area: Whole counties

County Jefferson County, WV

The radar

The Sterling radar (KLWX), 49 km from the middle of the area, began a volume at 22:22 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 12, 6:50 PM EDT	Thunderstorm Wind	Northeast Portion, WV	A tree was downed onto Route 230.

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 nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 10.4 hours before the alert went out and 56 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: 290 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 1099 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 45 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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 12, 3:00 PM EDT, 3 hours 25 minutes earlier.

Area forecast discussion, Jun 12, 3:00 PM EDT, 3 hours 25 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
300 PM EDT TUE JUN 12 2001

WITH TEMPS IN THE LOWER 90 AND DEW POINTS AROUND 70. HEAT INDICES
WILL RANGE BETWEEN 95 TO 100 DEGREES. SO HAVE ISSUED HEAT ADVISORY
FOR CWA FOR WEDNESDAY. THE CWA WILL BE SQUEEZED BETWEEN EVENING
CONVECTION TO THE NORTH AND WEST AND THE REMNANTS OF ALLISON TO THE
SOUTH. AS ALLISON MOVES NE IT SHOULD SLOW AS HIGH PRESSURE BUILDS TO
THE NORTH. IN ADDITION REMNANTS OF MCS/CONV ACTVTY OVR THE GRT LKS
AND VCNTY MAY ALSO AFFECT THE CWA. BY LATE WED A WEAKENING H5
IMPULSE PASS TO THE NORTH IN WEAK NW FLOW OF BLDG UPR RDG. SO WILL
INCREASE CLOUDS AND KEEP LOW POPS OF PCPN INTO FRIDAY IN MOST
LOCATIONS. A WEAK COLD FRONT IS PROGED OVER THE WEEKEND SO WILL KEEP
A SLIGHTLY COOLER AND MOSTLY DRY IN THE EXTENDED.

FCSTID = 17
DCA   68  91  68  86 /  20  30  30  30
BWI   68  91  68  87 /  20  30  30  30
MRB   65  91  67  87 /  20  30  30  30
IAD   68  91  68  87 /  20  30  30  30
CHO   65  90  65  85 /  20  30  30  30
HGR   65  91  67  87 /  20  30  30  30
NHK   68  90  68  87 /  20  30  30  30

.LWX...
DC...HEAT ADVISORY FOR WEDNESDAY FOR ZONE DCZ001.

MD...HEAT ADVISORY FOR WEDNESDAY FOR ZONES
MDZ002>007...MDZ009>011...MDZ013>014...MDZ016>018.

VA...HEAT ADVISORY FOR WEDNESDAY FOR ZONES
VAZ021...VAZ025>031...VAZ036>042...VAZ050>057.

WV...HEAT ADVISORY FOR WEDNESDAY FOR ZONES WVZ048>055.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 12, 5:30 PM EDT	Severe Thunderstorm Warning	LWX	Washington	30 min
Jun 12, 7:20 PM EDT	Severe Thunderstorm Warning	LWX	Carroll	40 min
Jun 12, 7:49 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore	41 min
Jun 12, 4:33 PM EDT	Severe Thunderstorm Warning	LWX	Morgan	42 min
Jun 12, 6:02 PM EDT	Severe Thunderstorm Warning	LWX	Berkeley	28 min

Nearby

Severe Thunderstorm Warnings in West Virginia, 2001 Every severe thunderstorm warning in 2001

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.