Here is the SPC message:
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 644
NWS STORM PREDICTION CENTER NORMAN OK
120 PM EDT FRI JUL 31 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
WESTERN CONNECTICUT
DISTRICT OF COLUMBIA
DELAWARE
MARYLAND
NEW JERSEY
SOUTHERN NEW YORK
EASTERN PENNSYLVANIA
NORTHERN VIRGINIA
COASTAL WATERS
EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 120 PM UNTIL 900
PM EDT.
HAIL TO 1.5 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 80
STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES EAST
NORTHEAST OF POUGHKEEPSIE NEW YORK TO 15 MILES WEST OF PATUXENT
RIVER MARYLAND. 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...MESSY EVOLUTION OF THUNDERSTORMS TODAY AHEAD OF BROAD
UPPER TROUGH AND ASSOCIATED SURFACE COLD FRONT. PREFRONTAL AIR MASS
IS VERY MOIST...ALMOST TROPICAL...AND WILL BECOME MARGINAL TO
MODERATELY UNSTABLE THIS AFTERNOON. SHEAR WILL BE FAIRLY STRONG AND
SUPPORT SUPERCELLS AND LINES OF STRONGER STORMS...WITH PRIMARY
THREATS OF DAMAGING WINDS/HAIL WITHIN NEARLY UNIDIRECTIONAL WIND
PROFILES. HOWEVER...LOW LEVEL SHEAR WILL BE SUFFICIENT FOR AN
ISOLATED TORNADO WITH ANY PERSISTENT SUPERCELL. HEAVY RAINFALL WILL
BE AN ADDITIONAL HAZARD THROUGH THE EVENING.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
MOTION VECTOR 25030.
...EVANS
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
Moderate Low
Note: See the experimental Public Watch (SEL) product with explicit hazard information section below. The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
SEL4
0-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 644
NWS STORM PREDICTION CENTER NORMAN OK
120 PM EDT FRI JUL 31 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
WESTERN CONNECTICUT
DISTRICT OF COLUMBIA
DELAWARE
MARYLAND
NEW JERSEY
SOUTHERN NEW YORK
EASTERN PENNSYLVANIA
NORTHERN VIRGINIA
COASTAL WATERS
EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 120 PM UNTIL 900
PM EDT.
SCATTERED DAMAGING WINDS
ISOLATED WIND GUSTS TO 70 MPH POSSIBLE
WIDELY SCATTERED LARGE HAIL TO 1.5 INCHES IN DIAMETER
ISOLATED TORNADOES
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 80
STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES EAST
NORTHEAST OF POUGHKEEPSIE NEW YORK TO 15 MILES WEST OF PATUXENT
RIVER MARYLAND. 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...MESSY EVOLUTION OF THUNDERSTORMS TODAY AHEAD OF BROAD
UPPER TROUGH AND ASSOCIATED SURFACE COLD FRONT. PREFRONTAL AIR MASS
IS VERY MOIST...ALMOST TROPICAL...AND WILL BECOME MARGINAL TO
MODERATELY UNSTABLE THIS AFTERNOON. SHEAR WILL BE FAIRLY STRONG AND
SUPPORT SUPERCELLS AND LINES OF STRONGER STORMS...WITH PRIMARY
THREATS OF DAMAGING WINDS/HAIL WITHIN NEARLY UNIDIRECTIONAL WIND
PROFILES. HOWEVER...LOW LEVEL SHEAR WILL BE SUFFICIENT FOR AN
ISOLATED TORNADO WITH ANY PERSISTENT SUPERCELL. HEAVY RAINFALL WILL
BE AN ADDITIONAL HAZARD THROUGH THE EVENING.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
MOTION VECTOR 25030.
...EVANS
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
Moderate Low
SEL4
0-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 644
NWS STORM PREDICTION CENTER NORMAN OK
120 PM EDT FRI JUL 31 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
WESTERN CONNECTICUT
DISTRICT OF COLUMBIA
DELAWARE
MARYLAND
NEW JERSEY
SOUTHERN NEW YORK
EASTERN PENNSYLVANIA
NORTHERN VIRGINIA
COASTAL WATERS
EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 120 PM UNTIL 900
PM EDT.
HAIL TO 1.5 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 80
STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES EAST
NORTHEAST OF POUGHKEEPSIE NEW YORK TO 15 MILES WEST OF PATUXENT
RIVER MARYLAND. 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...MESSY EVOLUTION OF THUNDERSTORMS TODAY AHEAD OF BROAD
UPPER TROUGH AND ASSOCIATED SURFACE COLD FRONT. PREFRONTAL AIR MASS
IS VERY MOIST...ALMOST TROPICAL...AND WILL BECOME MARGINAL TO
MODERATELY UNSTABLE THIS AFTERNOON. SHEAR WILL BE FAIRLY STRONG AND
SUPPORT SUPERCELLS AND LINES OF STRONGER STORMS...WITH PRIMARY
THREATS OF DAMAGING WINDS/HAIL WITHIN NEARLY UNIDIRECTIONAL WIND
PROFILES. HOWEVER...LOW LEVEL SHEAR WILL BE SUFFICIENT FOR AN
ISOLATED TORNADO WITH ANY PERSISTENT SUPERCELL. HEAVY RAINFALL WILL
BE AN ADDITIONAL HAZARD THROUGH THE EVENING.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
MOTION VECTOR 25030.
...EVANS
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
Moderate Low
Note: Click for Watch Status Reports.
WOUS64 KWNS 311715
WOU4
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 644
NWS STORM PREDICTION CENTER NORMAN OK
120 PM EDT FRI JUL 31 2009
SEVERE THUNDERSTORM WATCH 644 IS IN EFFECT UNTIL 900 PM EDT
FOR THE FOLLOWING LOCATIONS
CTC001-003-005-007-009-011-013-010100-
/O.NEW.KWNS.SV.A.0644.090731T1720Z-090801T0100Z/
CT
. CONNECTICUT COUNTIES INCLUDED ARE
FAIRFIELD HARTFORD LITCHFIELD
MIDDLESEX NEW HAVEN NEW LONDON
TOLLAND
DCC001-010100-
/O.NEW.KWNS.SV.A.0644.090731T1720Z-090801T0100Z/
DC
. DISTRICT OF COLUMBIA COUNTIES INCLUDED ARE
DISTRICT OF COLUMBIA
DEC001-003-005-010100-
/O.NEW.KWNS.SV.A.0644.090731T1720Z-090801T0100Z/
DE
. DELAWARE COUNTIES INCLUDED ARE
KENT NEW CASTLE SUSSEX
MDC003-005-009-011-013-015-017-021-025-027-029-031-033-035-037-
041-510-010100-
/O.NEW.KWNS.SV.A.0644.090731T1720Z-090801T0100Z/
MD
. MARYLAND COUNTIES INCLUDED ARE
ANNE ARUNDEL BALTIMORE CALVERT
CAROLINE CARROLL CECIL
CHARLES FREDERICK HARFORD
HOWARD KENT MONTGOMERY
PRINCE GEORGES QUEEN ANNE'S ST. MARYS
TALBOT
MARYLAND INDEPENDENT CITIES INCLUDED ARE
BALTIMORE CITY
NJC001-003-005-007-009-011-013-015-017-019-021-023-025-027-029-
031-033-035-037-039-041-010100-
/O.NEW.KWNS.SV.A.0644.090731T1720Z-090801T0100Z/
NJ
. NEW JERSEY COUNTIES INCLUDED ARE
ATLANTIC BERGEN BURLINGTON
CAMDEN CAPE MAY CUMBERLAND
ESSEX GLOUCESTER HUDSON
HUNTERDON MERCER MIDDLESEX
MONMOUTH MORRIS OCEAN
PASSAIC SALEM SOMERSET
SUSSEX UNION WARREN
NYC005-027-047-059-061-071-079-081-085-087-103-111-119-010100-
/O.NEW.KWNS.SV.A.0644.090731T1720Z-090801T0100Z/
NY
. NEW YORK COUNTIES INCLUDED ARE
BRONX DUTCHESS KINGS
NASSAU NEW YORK ORANGE
PUTNAM QUEENS RICHMOND
ROCKLAND SUFFOLK ULSTER
WESTCHESTER
PAC011-017-025-029-045-077-089-091-095-101-010100-
/O.NEW.KWNS.SV.A.0644.090731T1720Z-090801T0100Z/
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
BERKS BUCKS CARBON
CHESTER DELAWARE LEHIGH
MONROE MONTGOMERY NORTHAMPTON
PHILADELPHIA
VAC013-047-059-061-099-107-113-137-153-157-177-179-510-600-610-
630-683-685-010100-
/O.NEW.KWNS.SV.A.0644.090731T1720Z-090801T0100Z/
VA
. VIRGINIA COUNTIES INCLUDED ARE
ARLINGTON CULPEPER FAIRFAX
FAUQUIER KING GEORGE LOUDOUN
MADISON ORANGE PRINCE WILLIAM
RAPPAHANNOCK SPOTSYLVANIA STAFFORD
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
ALEXANDRIA FAIRFAX FALLS CHURCH
FREDERICKSBURG MANASSAS MANASSAS PARK
ANZ330-335-338-340-345-350-353-355-430-431-450-451-452-453-454-
455-530-531-532-533-534-535-536-537-010100-
/O.NEW.KWNS.SV.A.0644.090731T1720Z-090801T0100Z/
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
LONG ISLAND SOUND EAST OF NEW HAVEN CT/PORT JEFFERSON NY
LONG ISLAND SOUND WEST OF NEW HAVEN CT/PORT JEFFERSON NY
NEW YORK HARBOR
PECONIC AND GARDINERS BAYS
SOUTH SHORE BAYS FROM JONES INLET THROUGH SHINNECOCK BAY
MORICHES INLET NY TO MONTAUK POINT NY OUT 20 NM
FIRE ISLAND INLET NY TO MORICHES INLET NY OUT 20 NM
SANDY HOOK NJ TO FIRE ISLAND INLET NY OUT 20 NM
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
ATTN...WFO...OKX...LWX...PHI...ALY...BOX...
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Low
Severe Wind 65 kt+ Wind
Moderate Moderate
Severe Hail 2"+ Hail
Moderate Low
Note: The Aviation Watch (SAW) product is an approximation to the watch area. The actual watch is depicted by the shaded areas.
SAW4
WW 644 SEVERE TSTM CT DC DE MD NJ NY PA VA CW 311720Z - 010100Z
AXIS..80 STATUTE MILES EAST AND WEST OF LINE..
40ENE POU/POUGHKEEPSIE NY/ - 15W NHK/PATUXENT RIVER MD/
..AVIATION COORDS.. 70NM E/W /22WSW BDL - 38SSE DCA/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 450. MEAN STORM MOTION VECTOR 25030.
LAT...LON 41847161 38277522 38277816 41847472
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU4.
Watch 644 Status Report Message has not been issued yet.
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