Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
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Watch Status Reports.
SEL3
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 233
NWS STORM PREDICTION CENTER NORMAN OK
125 PM EDT WED APR 27 2011
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
CENTRAL MARYLAND
CENTRAL NORTH CAROLINA
CENTRAL VIRGINIA
EASTERN WEST VIRGINIA
COASTAL WATERS
EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 125 PM UNTIL
800 PM EDT.
TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 25 MILES NORTH NORTHWEST OF
MARTINSBURG WEST VIRGINIA TO 25 MILES SOUTH OF SOUTHERN PINES
NORTH CAROLINA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU3).
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.
OTHER WATCH INFORMATION...CONTINUE...WW 230...WW 231...WW 232...
DISCUSSION...SCATTERED THUNDERSTORMS ARE INCREASING ACROSS PORTIONS
OF NC/VA IN REGION OF WARM/MOIST AND UNSTABLE AIR MASS. INCREASING
MID AND LOW LEVEL WIND FIELDS THROUGH THE DAY SUGGEST A RISK OF
ORGANIZED/SUPERCELL STORMS CAPABLE OF LARGE HAIL AND DAMAGING WINDS.
THE TORNADO THREAT IS NOT PARTICULARLY HIGH...BUT SUFFICIENT LOW
LEVEL SHEAR IS PRESENT FOR A RISK OF ISOLATED SPIN UPS IN THE MOST
INTENSE SUPERCELLS.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 22035.
...HART
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW3
WW 233 TORNADO MD NC VA WV CW 271725Z - 280000Z
AXIS..60 STATUTE MILES EAST AND WEST OF LINE..
25NNW MRB/MARTINSBURG WV/ - 25S SOP/SOUTHERN PINES NC/
..AVIATION COORDS.. 50NM E/W /47SE JST - 40NNE FLO/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 22035.
LAT...LON 39727702 34847831 34848044 39727929
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU3.
Watch 233 Status Report Messages:
STATUS REPORT #4 ON WW 233
VALID 272140Z - 272240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 NNW RIC
TO 40 S CHO TO 20 N LYH TO 35 S EKN.
..BROYLES..04/27/11
ATTN...WFO...LWX...RAH...RNK...AKQ...
&&
STATUS REPORT FOR WT 233
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
DCC001-272240-
DC
. DISTRICT OF COLUMBIA COUNTIES INCLUDED ARE
DISTRICT OF COLUMBIA
$$
MDC001-003-005-009-013-017-021-025-027-031-033-037-043-510-
272240-
MD
. MARYLAND COUNTIES INCLUDED ARE
ALLEGANY ANNE ARUNDEL BALTIMORE
CALVERT CARROLL CHARLES
FREDERICK HARFORD HOWARD
MONTGOMERY PRINCE GEORGES ST. MARYS
WASHINGTON
MARYLAND INDEPENDENT CITIES INCLUDED ARE
BALTIMORE CITY
$$
VAC003-013-015-043-047-059-061-065-069-079-091-099-107-109-113-
125-137-139-153-157-165-171-177-179-187-510-540-600-610-630-660-
683-685-790-820-840-272240-
VA
. VIRGINIA COUNTIES INCLUDED ARE
ALBEMARLE ARLINGTON AUGUSTA
CLARKE CULPEPER FAIRFAX
FAUQUIER FLUVANNA FREDERICK
GREENE HIGHLAND KING GEORGE
LOUDOUN LOUISA 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
$$
WVC003-023-027-031-037-057-065-071-272240-
WV
. WEST VIRGINIA COUNTIES INCLUDED ARE
BERKELEY GRANT HAMPSHIRE
HARDY JEFFERSON MINERAL
MORGAN PENDLETON
$$
ANZ530-531-532-533-534-535-536-537-538-539-540-541-542-543-
272240-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
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
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 233
VALID 272045Z - 272140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 NNW RIC
TO 40 S CHO TO 20 NNE LYH TO 35 S EKN.
..BROYLES..04/27/11
ATTN...WFO...LWX...RAH...RNK...AKQ...
&&
STATUS REPORT FOR WT 233
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
DCC001-272140-
DC
. DISTRICT OF COLUMBIA COUNTIES INCLUDED ARE
DISTRICT OF COLUMBIA
$$
MDC001-003-005-009-013-017-021-025-027-031-033-037-043-510-
272140-
MD
. MARYLAND COUNTIES INCLUDED ARE
ALLEGANY ANNE ARUNDEL BALTIMORE
CALVERT CARROLL CHARLES
FREDERICK HARFORD HOWARD
MONTGOMERY PRINCE GEORGES ST. MARYS
WASHINGTON
MARYLAND INDEPENDENT CITIES INCLUDED ARE
BALTIMORE CITY
$$
VAC003-013-015-043-047-059-061-065-069-079-091-099-107-109-113-
125-137-139-153-157-165-171-177-179-187-510-540-600-610-630-660-
683-685-790-820-840-272140-
VA
. VIRGINIA COUNTIES INCLUDED ARE
ALBEMARLE ARLINGTON AUGUSTA
CLARKE CULPEPER FAIRFAX
FAUQUIER FLUVANNA FREDERICK
GREENE HIGHLAND KING GEORGE
LOUDOUN LOUISA 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
$$
WVC003-023-027-031-037-057-065-071-272140-
WV
. WEST VIRGINIA COUNTIES INCLUDED ARE
BERKELEY GRANT HAMPSHIRE
HARDY JEFFERSON MINERAL
MORGAN PENDLETON
$$
ANZ530-531-532-533-534-535-536-537-538-539-540-541-542-543-
272140-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
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
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 233
VALID 271945Z - 272040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 5 W RZZ TO
30 E DAN TO 20 ESE LYH TO 45 NE SSU.
..BROYLES..04/27/11
ATTN...WFO...LWX...RAH...RNK...AKQ...
&&
STATUS REPORT FOR WT 233
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
DCC001-272040-
DC
. DISTRICT OF COLUMBIA COUNTIES INCLUDED ARE
DISTRICT OF COLUMBIA
$$
MDC001-003-005-009-013-017-021-025-027-031-033-037-043-510-
272040-
MD
. MARYLAND COUNTIES INCLUDED ARE
ALLEGANY ANNE ARUNDEL BALTIMORE
CALVERT CARROLL CHARLES
FREDERICK HARFORD HOWARD
MONTGOMERY PRINCE GEORGES ST. MARYS
WASHINGTON
MARYLAND INDEPENDENT CITIES INCLUDED ARE
BALTIMORE CITY
$$
VAC003-007-013-015-025-033-041-043-047-049-053-059-061-065-069-
075-079-085-087-091-099-107-109-111-113-117-125-135-137-139-145-
147-153-157-165-171-177-179-187-510-540-600-610-630-660-683-685-
760-790-820-840-272040-
VA
. VIRGINIA COUNTIES INCLUDED ARE
ALBEMARLE AMELIA ARLINGTON
AUGUSTA BRUNSWICK CAROLINE
CHESTERFIELD CLARKE CULPEPER
CUMBERLAND DINWIDDIE FAIRFAX
FAUQUIER FLUVANNA FREDERICK
GOOCHLAND GREENE HANOVER
HENRICO HIGHLAND KING GEORGE
LOUDOUN LOUISA LUNENBURG
MADISON MECKLENBURG NELSON
NOTTOWAY ORANGE PAGE
POWHATAN PRINCE EDWARD PRINCE WILLIAM
RAPPAHANNOCK ROCKINGHAM SHENANDOAH
SPOTSYLVANIA STAFFORD WARREN
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
ALEXANDRIA CHARLOTTESVILLE FAIRFAX
FALLS CHURCH FREDERICKSBURG HARRISONBURG
MANASSAS MANASSAS PARK RICHMOND
STAUNTON WAYNESBORO WINCHESTER
$$
WVC003-023-027-031-037-057-065-071-272040-
WV
. WEST VIRGINIA COUNTIES INCLUDED ARE
BERKELEY GRANT HAMPSHIRE
HARDY JEFFERSON MINERAL
MORGAN PENDLETON
$$
ANZ530-531-532-533-534-535-536-537-538-539-540-541-542-543-
272040-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
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
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 233
VALID 271835Z - 271940Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..BROYLES..04/27/11
ATTN...WFO...LWX...RAH...RNK...AKQ...
&&
STATUS REPORT FOR WT 233
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
DCC001-271940-
DC
. DISTRICT OF COLUMBIA COUNTIES INCLUDED ARE
DISTRICT OF COLUMBIA
$$
MDC001-003-005-009-013-017-021-025-027-031-033-037-043-510-
271940-
MD
. MARYLAND COUNTIES INCLUDED ARE
ALLEGANY ANNE ARUNDEL BALTIMORE
CALVERT CARROLL CHARLES
FREDERICK HARFORD HOWARD
MONTGOMERY PRINCE GEORGES ST. MARYS
WASHINGTON
MARYLAND INDEPENDENT CITIES INCLUDED ARE
BALTIMORE CITY
$$
NCC001-007-033-037-051-057-063-065-067-069-077-081-083-085-093-
101-105-123-125-127-135-145-151-153-157-163-165-167-169-181-183-
185-191-195-271940-
NC
. NORTH CAROLINA COUNTIES INCLUDED ARE
ALAMANCE ANSON CASWELL
CHATHAM CUMBERLAND DAVIDSON
DURHAM EDGECOMBE FORSYTH
FRANKLIN GRANVILLE GUILFORD
HALIFAX HARNETT HOKE
JOHNSTON LEE MONTGOMERY
MOORE NASH ORANGE
PERSON RANDOLPH RICHMOND
ROCKINGHAM SAMPSON SCOTLAND
STANLY STOKES VANCE
WAKE WARREN WAYNE
WILSON
$$
VAC003-005-007-009-011-013-015-017-019-023-025-029-031-033-037-
041-043-047-049-053-059-061-065-067-069-075-079-083-085-087-089-
091-099-107-109-111-113-117-125-135-137-139-143-145-147-153-157-
163-165-171-177-179-187-510-515-530-540-580-590-600-610-630-660-
678-680-683-685-690-760-790-820-840-271940-
VA
. VIRGINIA COUNTIES INCLUDED ARE
ALBEMARLE ALLEGHANY AMELIA
AMHERST APPOMATTOX ARLINGTON
AUGUSTA BATH BEDFORD
BOTETOURT BRUNSWICK BUCKINGHAM
CAMPBELL CAROLINE CHARLOTTE
CHESTERFIELD CLARKE CULPEPER
CUMBERLAND DINWIDDIE FAIRFAX
FAUQUIER FLUVANNA FRANKLIN
FREDERICK GOOCHLAND GREENE
HALIFAX HANOVER HENRICO
HENRY HIGHLAND KING GEORGE
LOUDOUN LOUISA LUNENBURG
MADISON MECKLENBURG NELSON
NOTTOWAY ORANGE PAGE
PITTSYLVANIA POWHATAN PRINCE EDWARD
PRINCE WILLIAM RAPPAHANNOCK ROCKBRIDGE
ROCKINGHAM SHENANDOAH SPOTSYLVANIA
STAFFORD WARREN
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
ALEXANDRIA BEDFORD BUENA VISTA
CHARLOTTESVILLE COVINGTON DANVILLE
FAIRFAX FALLS CHURCH FREDERICKSBURG
HARRISONBURG LEXINGTON LYNCHBURG
MANASSAS MANASSAS PARK MARTINSVILLE
RICHMOND STAUNTON WAYNESBORO
WINCHESTER
$$
WVC003-023-027-031-037-057-065-071-271940-
WV
. WEST VIRGINIA COUNTIES INCLUDED ARE
BERKELEY GRANT HAMPSHIRE
HARDY JEFFERSON MINERAL
MORGAN PENDLETON
$$
ANZ530-531-532-533-534-535-536-537-538-539-540-541-542-543-
271940-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
CHESAPEAKE BAY NORTH OF POOLES ISLAND MD
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD
CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD
TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR
CHESTER RIVER TO QUEENSTOWN MD
EASTERN BAY
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER
PATUXENT RIVER TO BROOMES ISLAND MD
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH
ISLAND
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Mod (40%)
|
Probability of 1 or more strong (F2-F5) tornadoes
|
Low (20%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (30%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (30%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (40%)
|
Probability
of 1 or
more hailstones > 2 inches
|
Mod (30%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (70%)
|
For each watch, probabilities for particular events inside the watch
(listed above in each table) are determined by the issuing forecaster.
The "Low" category contains probability values ranging from less than 2%
to 20% (F2-F5 tornadoes), less than 5% to 20% (all other probabilities),
"Moderate" from 30% to 60%, and "High" from 70% to greater than 95%.
High values are bolded and lighter in color to provide awareness of
an increased threat for a particular event.