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.
SEL4
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 314
NWS STORM PREDICTION CENTER NORMAN OK
125 PM EDT FRI MAY 29 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
DISTRICT OF COLUMBIA
DELAWARE
EASTERN MARYLAND
SOUTHERN NEW JERSEY
PARTS OF SOUTHEAST PENNSYLVANIA
PARTS OF NORTHERN AND CENTRAL VIRGINIA
COASTAL WATERS
EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 125 PM UNTIL 800
PM EDT.
HAIL TO 2 INCHES 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 90
STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES NORTH OF
PHILADELPHIA PENNSYLVANIA TO 25 MILES WEST OF RICHMOND VIRGINIA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU4).
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.
DISCUSSION...THUNDERSTORMS WILL INCREASE IN NUMBER AND INTENSITY
ACROSS THE WATCH AREA THRU THE AFTERNOON AS AIR MASS CONTINUES TO
HEAT/DESTABILIZE. WITH 25-30KT OF SHEAR...PRIMARY STORM MODE WILL
BE MULTI-CELLULAR WITH ASSOCIATED DAMAGING WIND AND HAIL THREAT.
AVIATION...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 450. MEAN STORM
MOTION VECTOR 26025.
...HALES
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW4
WW 314 SEVERE TSTM DC DE MD NJ PA VA CW 291725Z - 300000Z
AXIS..90 STATUTE MILES EAST AND WEST OF LINE..
20N PHL/PHILADELPHIA PA/ - 25W RIC/RICHMOND VA/
..AVIATION COORDS.. 80NM E/W /32SE ETX - 21W RIC/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 450. MEAN STORM MOTION VECTOR 26025.
LAT...LON 40137355 37497612 37497941 40137694
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU4.
Watch 314 Status Report Messages:
STATUS REPORT #4 ON WW 314
VALID 292330Z - 300000Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 E LYH TO
30 E CHO TO 40 N RIC TO 25 E BWI TO 5 SE DOV TO 25 SE ACY.
WW 314 WILL BE ALLOWED TO EXPIRE AT 300000Z.
..HURLBUT..05/29/09
ATTN...WFO...LWX...PHI...AKQ...CTP...RNK...
&&
STATUS REPORT FOR WS 314
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
DEC001-005-300000-
DE
. DELAWARE COUNTIES INCLUDED ARE
KENT SUSSEX
$$
MDC011-019-035-039-041-045-047-300000-
MD
. MARYLAND COUNTIES INCLUDED ARE
CAROLINE DORCHESTER QUEEN ANNE'S
SOMERSET TALBOT WICOMICO
WORCESTER
$$
VAC001-033-049-057-075-085-087-097-101-103-109-119-127-133-145-
159-193-760-300000-
VA
. VIRGINIA COUNTIES INCLUDED ARE
ACCOMACK CAROLINE CUMBERLAND
ESSEX GOOCHLAND HANOVER
HENRICO KING AND QUEEN KING WILLIAM
LANCASTER LOUISA MIDDLESEX
NEW KENT NORTHUMBERLAND POWHATAN
RICHMOND WESTMORELAND
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
RICHMOND
$$
ANZ453-454-630-300000-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
COASTAL WATERS FROM GREAT EGG INLET TO CAPE MAY NJ OUT 20 NM
COASTAL WATERS FROM CAPE MAY NJ TO CAPE HENLOPEN DE OUT 20 NM
CHESAPEAKE BAY FROM SMITH POINT TO WINDMILL POINT VA
$$
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.
$$
STATUS REPORT #3 ON WW 314
VALID 292240Z - 292340Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 NW LYH TO
10 SE CHO TO 45 E CHO TO 25 SSW DCA TO 10 NNE DCA TO 20 ENE BWI
TO 20 SSE PHL TO 35 SE JFK.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 895
..HURLBUT..05/29/09
ATTN...WFO...LWX...PHI...AKQ...CTP...RNK...
&&
STATUS REPORT FOR WS 314
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
DEC001-005-292340-
DE
. DELAWARE COUNTIES INCLUDED ARE
KENT SUSSEX
$$
MDC003-009-011-017-019-029-031-035-037-039-041-045-047-292340-
MD
. MARYLAND COUNTIES INCLUDED ARE
ANNE ARUNDEL CALVERT CAROLINE
CHARLES DORCHESTER KENT
MONTGOMERY QUEEN ANNE'S ST. MARYS
SOMERSET TALBOT WICOMICO
WORCESTER
$$
NJC001-009-011-292340-
NJ
. NEW JERSEY COUNTIES INCLUDED ARE
ATLANTIC CAPE MAY CUMBERLAND
$$
VAC001-009-029-033-049-057-065-075-085-087-097-099-101-103-109-
119-127-133-145-159-193-630-760-292340-
VA
. VIRGINIA COUNTIES INCLUDED ARE
ACCOMACK AMHERST BUCKINGHAM
CAROLINE CUMBERLAND ESSEX
FLUVANNA GOOCHLAND HANOVER
HENRICO KING AND QUEEN KING GEORGE
KING WILLIAM LANCASTER LOUISA
MIDDLESEX NEW KENT NORTHUMBERLAND
POWHATAN RICHMOND WESTMORELAND
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
FREDERICKSBURG RICHMOND
$$
ANZ431-451-452-453-454-532-533-534-537-630-292340-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE
COASTAL WATERS FROM MANASQUAN INLET TO LITTLE EGG INLET NJ OUT 20
NM
COASTAL WATERS FROM LITTLE EGG INLET TO GREAT EGG INLET NJ OUT 20
NM
COASTAL WATERS FROM GREAT EGG INLET TO CAPE MAY NJ OUT 20 NM
COASTAL WATERS FROM CAPE MAY NJ TO CAPE HENLOPEN DE OUT 20 NM
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD
CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA
TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA
CHESAPEAKE BAY FROM SMITH POINT TO WINDMILL POINT VA
$$
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.
$$
STATUS REPORT #2 ON WW 314
VALID 292140Z - 292240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 SSW SHD
TO CHO TO 30 NE CHO TO 30 S MRB TO 25 NNW BWI TO 35 W ILG TO 35
NNW ILG.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 893.
..PETERS..05/29/09
ATTN...WFO...LWX...PHI...AKQ...CTP...RNK...
&&
STATUS REPORT FOR WS 314
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
DEC001-003-005-292240-
DE
. DELAWARE COUNTIES INCLUDED ARE
KENT NEW CASTLE SUSSEX
$$
DCC001-292240-
DC
. DISTRICT OF COLUMBIA COUNTIES INCLUDED ARE
DISTRICT OF COLUMBIA
$$
MDC003-005-009-011-015-017-019-025-027-029-031-033-035-037-039-
041-045-047-510-292240-
MD
. MARYLAND COUNTIES INCLUDED ARE
ANNE ARUNDEL BALTIMORE CALVERT
CAROLINE CECIL CHARLES
DORCHESTER HARFORD HOWARD
KENT MONTGOMERY PRINCE GEORGES
QUEEN ANNE'S ST. MARYS SOMERSET
TALBOT WICOMICO WORCESTER
MARYLAND INDEPENDENT CITIES INCLUDED ARE
BALTIMORE CITY
$$
NJC001-005-007-009-011-015-029-033-292240-
NJ
. NEW JERSEY COUNTIES INCLUDED ARE
ATLANTIC BURLINGTON CAMDEN
CAPE MAY CUMBERLAND GLOUCESTER
OCEAN SALEM
$$
PAC017-029-045-091-101-292240-
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
BUCKS CHESTER DELAWARE
MONTGOMERY PHILADELPHIA
$$
VAC001-003-009-013-029-033-047-049-057-059-061-065-075-085-087-
097-099-101-103-107-109-119-125-127-133-137-145-153-157-159-177-
179-193-510-540-600-610-630-683-685-760-292240-
VA
. VIRGINIA COUNTIES INCLUDED ARE
ACCOMACK ALBEMARLE AMHERST
ARLINGTON BUCKINGHAM CAROLINE
CULPEPER CUMBERLAND ESSEX
FAIRFAX FAUQUIER FLUVANNA
GOOCHLAND HANOVER HENRICO
KING AND QUEEN KING GEORGE KING WILLIAM
LANCASTER LOUDOUN LOUISA
MIDDLESEX NELSON NEW KENT
NORTHUMBERLAND ORANGE POWHATAN
PRINCE WILLIAM RAPPAHANNOCK RICHMOND
SPOTSYLVANIA STAFFORD WESTMORELAND
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
ALEXANDRIA CHARLOTTESVILLE FAIRFAX
FALLS CHURCH FREDERICKSBURG MANASSAS
MANASSAS PARK RICHMOND
$$
ANZ430-431-451-452-453-454-530-531-532-533-534-535-536-537-630-
292240-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE
DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE
COASTAL WATERS FROM MANASQUAN INLET TO LITTLE EGG INLET NJ OUT 20
NM
COASTAL WATERS FROM LITTLE EGG INLET TO GREAT EGG INLET NJ OUT 20
NM
COASTAL WATERS FROM GREAT EGG INLET TO CAPE MAY NJ OUT 20 NM
COASTAL WATERS FROM CAPE MAY NJ TO CAPE HENLOPEN DE OUT 20 NM
CHESAPEAKE BAY NORTH OF POOLES ISLAND MD
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD
CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD
TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA
CHESAPEAKE BAY FROM SMITH POINT TO WINDMILL POINT VA
$$
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.
$$
STATUS REPORT #1 ON WW 314
VALID 292020Z - 292140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 SSE MRB
TO 35 E CXY.
..SPC..05/29/09
ATTN...WFO...LWX...PHI...AKQ...CTP...RNK...
&&
STATUS REPORT FOR WS 314
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
DEC001-003-005-292140-
DE
. DELAWARE COUNTIES INCLUDED ARE
KENT NEW CASTLE SUSSEX
$$
DCC001-292140-
DC
. DISTRICT OF COLUMBIA COUNTIES INCLUDED ARE
DISTRICT OF COLUMBIA
$$
MDC003-005-009-011-013-015-017-019-021-025-027-029-031-033-035-
037-039-041-045-047-510-292140-
MD
. MARYLAND COUNTIES INCLUDED ARE
ANNE ARUNDEL BALTIMORE CALVERT
CAROLINE CARROLL CECIL
CHARLES DORCHESTER FREDERICK
HARFORD HOWARD KENT
MONTGOMERY PRINCE GEORGES QUEEN ANNE'S
ST. MARYS SOMERSET TALBOT
WICOMICO WORCESTER
MARYLAND INDEPENDENT CITIES INCLUDED ARE
BALTIMORE CITY
$$
NJC001-005-007-009-011-015-029-033-292140-
NJ
. NEW JERSEY COUNTIES INCLUDED ARE
ATLANTIC BURLINGTON CAMDEN
CAPE MAY CUMBERLAND GLOUCESTER
OCEAN SALEM
$$
PAC017-029-045-091-101-292140-
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
BUCKS CHESTER DELAWARE
MONTGOMERY PHILADELPHIA
$$
VAC001-003-009-013-029-033-047-049-057-059-061-065-075-079-085-
087-097-099-101-103-107-109-113-119-125-127-133-137-145-153-157-
159-177-179-193-510-540-600-610-630-683-685-760-292140-
VA
. VIRGINIA COUNTIES INCLUDED ARE
ACCOMACK ALBEMARLE AMHERST
ARLINGTON BUCKINGHAM CAROLINE
CULPEPER CUMBERLAND ESSEX
FAIRFAX FAUQUIER FLUVANNA
GOOCHLAND GREENE HANOVER
HENRICO KING AND QUEEN KING GEORGE
KING WILLIAM LANCASTER LOUDOUN
LOUISA MADISON MIDDLESEX
NELSON NEW KENT NORTHUMBERLAND
ORANGE POWHATAN PRINCE WILLIAM
RAPPAHANNOCK RICHMOND SPOTSYLVANIA
STAFFORD WESTMORELAND
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
ALEXANDRIA CHARLOTTESVILLE FAIRFAX
FALLS CHURCH FREDERICKSBURG MANASSAS
MANASSAS PARK RICHMOND
$$
ANZ430-431-451-452-453-454-530-531-532-533-534-535-536-537-630-
292140-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE
DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE
COASTAL WATERS FROM MANASQUAN INLET TO LITTLE EGG INLET NJ OUT 20
NM
COASTAL WATERS FROM LITTLE EGG INLET TO GREAT EGG INLET NJ OUT 20
NM
COASTAL WATERS FROM GREAT EGG INLET TO CAPE MAY NJ OUT 20 NM
COASTAL WATERS FROM CAPE MAY NJ TO CAPE HENLOPEN DE OUT 20 NM
CHESAPEAKE BAY NORTH OF POOLES ISLAND MD
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD
CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD
TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA
CHESAPEAKE BAY FROM SMITH POINT TO WINDMILL POINT VA
$$
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
|
Low (10%)
|
Probability of 1 or more strong (F2-F5) tornadoes
|
Low (<2%)
|
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 (30%)
|
Probability
of 1 or
more hailstones > 2 inches
|
Low (20%)
|
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.