CANCELED
Severe Thunderstorm Watch
Statement as of 4:47 PM EDT on September 08, 2012
The National Weather Service has cancelled Severe Thunderstorm
Watch 636 for the following areas
The District of Columbia
In Maryland this cancels 6 counties
In central Maryland
Howard Montgomery
In north central Maryland
Carroll Frederick
In northern Maryland
Baltimore Harford
In Virginia this cancels 12 counties
In central Virginia
Albemarle Greene Nelson
Orange
In northern Virginia
Arlington Culpeper Fairfax
Fauquier Loudoun Prince William
In northwest Virginia
Madison Rappahannock
In Maryland this cancels 1 independent city
In northern Maryland
Baltimore City
In Virginia this cancels 5 independent cities
In central Virginia
Charlottesville
In northern Virginia
City of Alexandria City of Fairfax City of Falls Church
City of Manassas
This includes the cities of…Aberdeen…Arlington…Bel Air…
Chantilly…Charlottesville…Columbia…Culpeper…Edgewood…
Fallston…Frederick…Gaithersburg…Greenfield…
Havre de Grace…Joppatowne…Leesburg…Madison…McLean…
Orange…Reston…Stanardsville…Sterling…Towson…Warrenton…
Washington…Washington…Westminster and Woodbridge.
Scroll For City, County, State Outlines
SEVERE THUNDERSTORM WATCH NUMBER 636
URGENT – IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 636
NWS STORM PREDICTION CENTER NORMAN OK
1215 PM EDT SAT SEP 8 2012
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
DISTRICT OF COLUMBIA
DELAWARE
MUCH OF MARYLAND
NEW JERSEY
EASTERN PENNSYLVANIA
NORTHERN VIRGINIA
THE EASTERN PANHANDLE OF WEST VIRGINIA
COASTAL WATERS
EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 1215 PM UNTIL
1000 PM EDT.
HAIL TO 1 INCH IN DIAMETER…THUNDERSTORM WIND GUSTS TO 70
MPH…AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 100
STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTH
NORTHWEST OF ALLENTOWN PENNSYLVANIA TO 55 MILES SOUTHWEST OF
WASHINGTON DISTRICT OF COLUM. FOR A COMPLETE DEPICTION OF THE
WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).
REMEMBER…A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.
OTHER WATCH INFORMATION…CONTINUE…WW 634…WW 635…
DISCUSSION…FRONTAL SQUALL LINE IS EXPECTED TO INTENSIFY THIS
AFTERNOON AS IT ENCOUNTERS THE AREA OF GREATER SURFACE
HEATING/INSTABILITY ACROSS ERN PA/MD/VA. INCREASING LOW-MIDLEVEL
FLOW WITH AN EJECTING SHORTWAVE TROUGH WILL LIKEWISE CONTRIBUTE TO
AN INCREASING RISK FOR WIDESPREAD DAMAGING WINDS THIS AFTERNOON THIS
AFTERNOON/EVENING.
AVIATION…A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS.
A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION
VECTOR 26040.
SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 636
NWS STORM PREDICTION CENTER NORMAN OK
1215 PM EDT SAT SEP 8 2012
SEVERE THUNDERSTORM WATCH 636 IS IN EFFECT UNTIL 1000 PM EDT
FOR THE FOLLOWING LOCATIONS
DCC001-090200-
/O.NEW.KWNS.SV.A.0636.120908T1615Z-120909T0200Z/
DC
. DISTRICT OF COLUMBIA COUNTIES INCLUDED ARE
DISTRICT OF COLUMBIA
DEC001-003-005-090200-
/O.NEW.KWNS.SV.A.0636.120908T1615Z-120909T0200Z/
DE
. DELAWARE COUNTIES INCLUDED ARE
KENT NEW CASTLE SUSSEX
MDC001-003-005-009-011-013-015-017-021-025-027-029-031-033-035-
037-041-043-510-090200-
/O.NEW.KWNS.SV.A.0636.120908T1615Z-120909T0200Z/
MD
. MARYLAND COUNTIES INCLUDED ARE
ALLEGANY ANNE ARUNDEL BALTIMORE
CALVERT CAROLINE CARROLL
CECIL CHARLES FREDERICK
HARFORD HOWARD KENT
MONTGOMERY PRINCE GEORGES QUEEN ANNE’S
ST. MARYS TALBOT WASHINGTON
MARYLAND INDEPENDENT CITIES INCLUDED ARE
BALTIMORE CITY
NJC001-005-007-009-011-015-019-021-023-025-027-029-033-035-037-
041-090200-
/O.NEW.KWNS.SV.A.0636.120908T1615Z-120909T0200Z/
NJ
. NEW JERSEY COUNTIES INCLUDED ARE
ATLANTIC BURLINGTON CAMDEN
CAPE MAY CUMBERLAND GLOUCESTER
HUNTERDON MERCER MIDDLESEX
MONMOUTH MORRIS OCEAN
SALEM SOMERSET SUSSEX
WARREN
PAC001-011-017-025-027-029-035-037-041-043-045-055-057-061-067-
071-075-077-081-087-089-091-093-095-097-099-101-107-109-113-117-
119-133-090200-
/O.NEW.KWNS.SV.A.0636.120908T1615Z-120909T0200Z/
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
ADAMS BERKS BUCKS
CARBON CENTRE CHESTER
CLINTON COLUMBIA CUMBERLAND
DAUPHIN DELAWARE FRANKLIN
FULTON HUNTINGDON JUNIATA
LANCASTER LEBANON LEHIGH
LYCOMING MIFFLIN MONROE
MONTGOMERY MONTOUR NORTHAMPTON
NORTHUMBERLAND PERRY PHILADELPHIA
SCHUYLKILL SNYDER SULLIVAN
TIOGA UNION YORK
VAC003-013-015-043-047-059-061-069-079-091-099-107-113-125-137-
139-153-157-165-171-177-179-187-510-540-600-610-630-660-683-685-
790-820-840-090200-
/O.NEW.KWNS.SV.A.0636.120908T1615Z-120909T0200Z/
VA
. VIRGINIA COUNTIES INCLUDED ARE
ALBEMARLE ARLINGTON AUGUSTA
CLARKE CULPEPER FAIRFAX
FAUQUIER FREDERICK GREENE
HIGHLAND KING GEORGE LOUDOUN
MADISON NELSON ORANGE
PAGE PRINCE WILLIAM RAPPAHANNOCK
ROCKINGHAM SHENANDOAH SPOTSYLVANIA
STAFFORD WARREN
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
ALEXANDRIA CHARLOTTESVILLE FAIRFAX
FALLS CHURCH FREDERICKSBURG HARRISONBURG
MANASSAS MANASSAS PARK STAUNTON
WAYNESBORO WINCHESTER
WVC003-023-027-031-037-057-065-071-090200-
/O.NEW.KWNS.SV.A.0636.120908T1615Z-120909T0200Z/
WV
. WEST VIRGINIA COUNTIES INCLUDED ARE
BERKELEY GRANT HAMPSHIRE
HARDY JEFFERSON MINERAL
MORGAN PENDLETON
ANZ430-431-450-451-452-453-454-455-530-531-532-533-534-535-536-
537-538-539-540-541-542-543-090200-
/O.NEW.KWNS.SV.A.0636.120908T1615Z-120909T0200Z/
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE
DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE
COASTAL WATERS FROM SANDY HOOK TO MANASQUAN INLET NJ OUT 20 NM
COASTAL WATERS FROM MANASQUAN INLET TO LITTLE EGG INLET NJ OUT 20
NM
COASTAL WATERS FROM LITTLE EGG INLET TO GREAT EGG INLET NJ OUT 20
NM
COASTAL WATERS FROM GREAT EGG INLET TO CAPE MAY NJ OUT 20 NM
COASTAL WATERS FROM CAPE MAY NJ TO CAPE HENLOPEN DE OUT 20 NM
COASTAL WATERS FROM CAPE HENLOPEN TO FENWICK ISLAND DE OUT 20 NM
CHESAPEAKE BAY NORTH OF POOLES ISLAND MD
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD
CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD
TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR
CHESTER RIVER TO QUEENSTOWN MD
EASTERN BAY
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER
PATUXENT RIVER TO BROOMES ISLAND MD
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH
ISLAND
ATTN…WFO…LWX…PHI…CTP…
