Alert archive / Maryland / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 123, NWS Baltimore/Washington

August 10, 2001Calvert County, Charles County, Prince George's County, Maryland

NWS Baltimore/Washington issued this severe thunderstorm warning at Aug 10, 2001, 6:23 PM EDT for Calvert County, Charles County, Prince George's County, Maryland. It was in force for 37 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
Aug 10, 2001, 6:23 PM EDT (22:23 UTC)
Expired
Aug 10, 2001, 7:00 PM EDT
In force
37 min
Issued by
NWS Baltimore/Washington
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Calvert County, MD, Charles County, MD, Prince George's County, MD

What was reported inside it

TimeReportWhereRemark
Aug 10, 6:30 PM EDTThunderstorm WindCountywide, MDSeveral trees were downed.
Aug 10, 6:45 PM EDTThunderstorm WindLa Plata, MDTrees were downed onto Route 6.

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 Aug 10, 3:32 PM EDT, 2 hours 51 minutes earlier.

Area forecast discussion, Aug 10, 3:32 PM EDT, 2 hours 51 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE/WASHINGTON
332 PM EDT FRI AUG 10 2001

BUSY AFTERNOON DEVELOPING. HEAT WAVE WILL GIVE WAY TO SOME SVR
ACTVTY...THEN A STATIONARY FRONT WILL LAST WELL INTO THE EXTENDED.
HEAT ADV EAST OF THE BLUE RIDGE...AND EXCSVE HEAT WARN FOR THE
CITIES WILL LIKELY CONT UNTIL THE NEXT UPDATE.

TSTSM ACTVTY HAS BEEN DISORGNZED FOR THE MOST PART SO FAR.  INSTAB
IS VERY HIGH BUT SHR IS LOW. STATNTY CELLS DEF HAVE THE POTNTL FOR
FLSH FLDDNG WITH HIGH PRECIP H20.

STAT FRONT WILL WAVER AS SMALL IMPLSES MOVE NE ALONG IT. GENRNLY
WILL BE A CHC OF SHRA AND TSRA FOR MOST OF THE EXNDED.

STRONG
FCSTID = 78
DCA   74  88  73  88 /  50  50  40  40
BWI   72  87  71  87 /  50  50  40  40
MRB   71  86  67  85 /  40  40  40  30
IAD   72  87  71  87 /  50  50  40  40
CHO   72  87  71  87 /  50  50  40  40
HGR   70  85  66  84 /  40  40  40  30
NHK   74  87  71  87 /  60  50  40  40
W99   71  86  67  85 /  40  40  40  30

.LWX...
DC...EXCESSIVE HEAT WARNING FOR THIS AFTERNOON AND EVENING FOR ZONE
DCZ001.

MD...EXCESSIVE HEAT WARNING FOR THIS AFTERNOON AND EVENING FOR ZONE
MDZ011.

HEAT ADVISORY FOR THIS AFTERNOON AND EVENING FOR ZONES MDZ004>007...
MDZ009>010...MDZ013>014...MDZ016>018.

VA...HEAT ADVISORY FOR THIS AFTERNOON AND EVENING FOR ZONES
VAZ036>042...VAZ050>057.

WV...NONE.

In the hours before

Special weather statement, Aug 10, 2:11 PM EDT, 4 hours 12 minutes before
DCZ001-MDZ013-014-101815-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON
211 PM EDT FRI AUG 10 2001

...SCATTERED THUNDERSTORMS DEVELOPING ACROSS THE DISTRICT OF COLUMBIA
INTO CENTRAL MARYLAND...

AT 210 PM DOPPLER WEATHER RADAR INDICATED SCATTERED THUNDERSTORMS
DEVELOPING FROM THE DISTRICT OF COLUMBIA EASTWARD ACROSS NORTHERN
PRINCE GEORGES COUNTY MARYLAND INTO CENTRAL ANNE ARUNDEL COUNTY.

THE THUNDERSTORMS ARE MOVING EAST-NORTHEAST AT 15 TO 20 MPH AND WILL
AFFECT THE DISTRICT OF COLUMBIA...NORTHERN AND CENTRAL PRINCE
GEORGES COUNTY AND ANNE ARUNDEL COUNTY DURING THE NEXT HOUR.

THUNDERSTORMS COULD PRODUCE HEAVY RAIN...LIGHTNING AND WIND GUSTS TO
40 MPH.

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER.

DMW
Special weather statement, Aug 10, 2:28 PM EDT, 3 hours 55 minutes before
DCZ001-MDZ013-014-VAZ053-054-101830-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON
228 PM EDT FRI AUG 10 2001

AT 225 PM DOPPLER WEATHER RADAR INDICATED SCATTERED THUNDERSTORMS
EXTENDING FROM FAIRFAX CITY VIRGINIA ACROSS ARLINGTON COUNTY AND
WASHINGTON DC INTO NORTHERN PRINCE GEORGES THEN EASTWARD TO NEAR
CROFTON AND ARNOLD IN ANNE ARUNDEL COUNTY.

THESE STORMS WERE MOVING EAST-NORTHEAST AT 15 TO 20 MPH AND WILL
LIKELY PRODUCE HEAVY RAIN...LIGHTNING AND WIND GUSTS TO 40 MPH.

IF THREATENING WEATHER APPROACHES...SEEK SAFE SHELTER.

DMW
Special weather statement, Aug 10, 2:54 PM EDT, 3 hours 29 minutes before
DCZ001-MDZ013-014-VAZ053-054-101945-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON
254 PM EDT FRI AUG 10 2001

AT 250 PM DOPPLER WEATHER RADAR INDICATED SCATTERED THUNDERSTORMS
EXTENDING FROM FAIRFAX CITY VIRGINIA ACROSS ARLINGTON COUNTY AND
WASHINGTON DC INTO NORTHERN PRINCE GEORGES COUNTY THEN EASTWARD
TO NEAR CROFTON AND ARNOLD IN ANNE ARUNDEL COUNTY.

THE INDIVIDUAL STORMS WERE MOVING EAST-NORTHEAST AT 15 TO 20 MPH
BUT THE LINE OF STORMS WAS NEARLY STATIONARY. THESE THUNDERSTORMS
WILL PRODUCE HEAVY RAIN...LIGHTNING AND WIND GUSTS TO 40 MPH.

HEAVY RAIN MAY RESULT IN FLOODING OF LOW LYING AND POOR DRAINAGE
AREAS. NEVER TRY TO CROSS A FLOODED ROAD. THE WATER DEPTH MAY BE
TOO GREAT TO CROSS SAFELY.

IF THREATENING WEATHER APPROACHES...SEEK SAFE SHELTER.

DMW
Special weather statement, Aug 10, 4:10 PM EDT, 2 hours 13 minutes before
DCZ001-MDZ006-007-011-013-014-VAZ026>031-038>042-051>054-102100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE-WASHINGTON
410 PM EDT FRI AUG 10 2001

AT 405 PM DOPPLER WEATHER RADAR INDICATED SCATTERED THUNDERSTORMS
EXTENDING FROM EASTERN FAIRFAX COUNTY ACROSS ARLINGTON...THE
DISTRICT OF COLUMBIA...PRINCE GEORGES COUNTY AND ANNE ARUNDEL
COUNTY. THESE STORMS ARE MOVING EAST AT 20 MPH AND WILL AFFECT THE
AREA BETWEEN WASHINGTON DC AND THE CHESAPEAKE BAY DURING THE NEXT
HOUR OR SO.

ADDITIONAL THUNDERSTORMS WERE INDICATED OVER PORTIONS OF THE
SHENANDOAH VALLEY. THESE THUNDERSTORMS WERE MOVING EASTWARD AND WILL
MOVE INTO THE WESTERN SUBURBS OF WASHINGTON DC DURING THE NEXT HOUR
OR SO.

THUNDERSTORMS THIS EVENING WILL BE CAPABLE OF PRODUCING STRONG
WINDS...HEAVY RAIN AND LIGHTNING. HEAVY RAIN MAY PRODUCE FLOODING OF
LOW LYING AND POOR DRAINAGE AREAS.  NEVER TRY TO CROSS A FLOODED
ROAD. THE WATER DEPTH MAY BE TOO GREAT TO CROSS SAFELY.

IF THREATENING WEATHER APPROACHES YOUR AREA...SEEK SHELTER.

WALSTON
Special weather statement, Aug 10, 5:54 PM EDT, 29 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 10, 4:19 PM EDTSevere Thunderstorm WarningLWXFauquier, Prince William, City of Manassas41 min
Aug 10, 5:20 PM EDTSevere Thunderstorm WarningLWXStafford40 min
Aug 10, 3:28 PM EDTSevere Thunderstorm WarningLWXPrince George's47 min
Aug 10, 5:14 PM EDTSevere Thunderstorm WarningLWXAllegany46 min
Aug 10, 6:10 PM EDTSevere Thunderstorm WarningLWXCharles50 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2001Every 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.