Alert archive / Maryland / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 74, NWS Baltimore/Washington

June 21, 2001Howard County, Prince George's County, Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at Jun 21, 2001, 6:06 PM EDT for Howard County, Prince George's County, Maryland. It was in force for 54 min. 3 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 21, 2001, 6:06 PM EDT (22:06 UTC)
Expired: Jun 21, 2001, 7:00 PM EDT
In force: 54 min
Issued by: NWS Baltimore/Washington
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Howard County, MD, Prince George's County, MD

The radar

The Sterling radar (KLWX), 52 km from the middle of the area, began a volume at 22:08 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 21, 6:10 PM EDT	Thunderstorm Wind	Laurel, MD	A downed power pole blocked a road.
Jun 21, 6:17 PM EDT	Hail 1	Laurel, MD	Nickel to quarter sized hail fell.
Jun 21, 6:20 PM EDT	Thunderstorm Wind	West Friendship, MD	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 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 21, 3:35 PM EDT, 2 hours 31 minutes earlier.

Area forecast discussion, Jun 21, 3:35 PM EDT, 2 hours 31 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
335 PM EDT THU JUN 21 2001

FEW TSRA DVLPG...MAINLY ALNG PERIPHERY OF CWFA. W/ BEST FOCUSING
MECH/FORCING N AND W...WUD XPCT THESE AREAS TO BE MOST UNDER THE GUN
LTR TDA. GOOD OMEGA MVG INTO WRN SXNS THIS EVNG...SO LIKELY POPS
THERE...CHC ELSW.

H5 L/WV TROF DRIVES CDFNT INTO AREA TMRW. HWVR...FLW BCMS
PARALLEL...SO FWD MVMT STALLS. AMS AHD OF FNT EQUALLY UNSTBL AS
TDA...IF NOT SLGTLY MORE SO...PLUS FRNT PROVIDES A FOCUS/TRIGGER. W/
CD/QSTNRY FNT IN VCNTY...WL GO LIKELY POPS 2ND-4TH PDS. NO PD WL BE
TTL WASHOUT...BUT WL EMPH AFTN AND EVE CNVTN.

XTNDD THROWS A CURVE FM PREV PKG AS MRF DVLPS H5 CUTOFF LO OVR
APPALACHIA...AND LETS IT LINGER THRU DAY 5. W/ H3 JET STRK ON E SIDE
OF SYSTM...THINK THIS IS A LTL OVRDN. UKMET SHWS LTL MORE THAN WK
TROF/SFC REFLCTN IN AREA. WENT W/ A MRF WEIGHTED COMPROMISE...CLS TO
CNDN SOLN. ADDED MIX CLDS/SUN AND SCT AFTN SHRA TO SUN-TUE FCST. W/
FRNT STL IN VCNTY...INCL TSRA TO SUNDAY FCST AS WELL.  FOR DAY 6 & 7
WENT PTCLDY...AND LATER SHIFTS CAN LEAN IN APPRO DIRECTION.

ZFP/RDF BY 1945 UTC. LATER

FCSTID = 50...HTS
DCA   70  86  70  82 /  40  60  60  60
BWI   69  85  67  80 /  40  60  60  60
MRB   66  84  65  78 /  60  60  60  60
IAD   68  84  67  79 /  40  60  60  60
CHO   66  86  66  81 /  60  60  60  60
HGR   64  83  64  77 /  60  60  60  60
NHK   70  85  70  81 /  30  60  60  60

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

In the hours before

Local storm report, Jun 21, 3:09 PM EDT, 2 hours 57 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
309 PM EDT THU JUN 21 2001

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

0830 PM    BALTIMORE                 MD   WIND DAMAGE
06/20/01   BALTIMORE                      NUMEROUS TREES DOWN
                                          REPORTED BY PUBLIC WORKS

1030 PM    CHARLOTTESVILLE           VA   WIND DAMAGVE
06/20/01   ALBEMARLE                      NUMEROUS TREES AND
                                          POWERLINES DOWN

JLW/MM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 8:41 PM EDT	Severe Thunderstorm Warning	LWX	Greene, Madison	49 min
Jun 20, 9:34 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, City of Charlottesville	41 min
Jun 20, 10:11 PM EDT	Severe Thunderstorm Warning	LWX	Albemarle, City of Charlottesville	49 min
Jun 21, 7:50 PM EDT	Flash Flood Warning	LWX	Nelson	115 min
Jun 20, 8:10 PM EDT	Severe Thunderstorm Warning	LWX	Anne Arundel, Howard	65 min
Jun 20, 8:28 PM EDT	Severe Thunderstorm Warning	LWX	Baltimore, City of Baltimore	62 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; verification from NCEI's Storm Data; radar from the NEXRAD Level II archive.