Alert archive / Maryland / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 68, NWS Baltimore/Washington

June 20, 2001Baltimore County, City of Baltimore, Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 20, 2001, 7:51 PM EDT for Baltimore County, City of Baltimore, Maryland. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 20, 2001, 7:51 PM EDT (23:51 UTC)
Expired: Jun 20, 2001, 8:30 PM EDT
In force: 39 min
Issued by: NWS Baltimore/Washington
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Baltimore County, MD, City of Baltimore, MD

The radar

The Sterling radar (KLWX), 87 km from the middle of the area, began a volume at 23:55 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.

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 11.9 hours before the alert went out and 46 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: 483 J/kg
Mixed-layer CIN: -208 J/kg
Mixed-layer LCL: 991 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 100 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 Jun 20, 3:08 PM EDT, 4 hours 43 minutes earlier.

Area forecast discussion, Jun 20, 3:08 PM EDT, 4 hours 43 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
308 PM EDT WED JUN 20 2001

MODELS BRING UPPER LEVEL TROUGH SLOWLY EAST ACROSS CWA NEXT FEW
DAYS WITH COLD FRONT AT THE SURFACE. AS IT DOES MOISTURE WILL
INCREASE AND SO WILL DYNAMICS. THIS SHOULD PRODUCE MAINLY AFTERNOON
AND EVENING SHOWERS AND THUNDERSTORMS TOMORROW AND MORE WIDESPREAD
PRECIPITATION FRIDAY. UPPER LEVEL AND SURFACE FEATURES SHOULD MOVE
EAST OF THE AREA ON SUNDAY TAKING THE PRECIPITATION AND CLOUDS WITH
IT.

PLEASANT DRY WEATHER SHOULD FOLLOW EARLY NEXT WEEK.

FCSTID = 1
DCA   69  86  69  83 /  20  40  30  50
BWI   69  86  69  83 /  20  40  30  50
MRB   65  85  65  80 /  20  50  40  50
IAD   66  85  65  81 /  20  40  30  50
CHO   66  85  65  81 /  20  40  30  50
HGR   65  85  65  80 /  30  50  40  50
NHK   69  86  69  83 /  20  40  30  50

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

In the hours before

Local storm report, Jun 20, 4:06 PM EDT, 3 hours 45 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
406 PM EDT WED JUN 20 2001

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0345 PM    ROMNEY                    WV   .88 INCH HAIL
06/20/01   HAMPSHIRE

MKM

Local storm report, Jun 20, 7:29 PM EDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
729 PM EDT WED JUN 20 2001

TIME(EDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0445 PM    MARTINSBURG               WV   WIND DAMAGE
06/20/01   BERKELEY                       TREES AND POWER LINES WERE
                                          DOWNED. REPORTED BY LAW
                                          ENFORCEMENT.

MKM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 7:11 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, Harford	64 min

Nearby

Severe Thunderstorm Warnings in Maryland, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.