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
TORNADO WATCH NUMBER 594
NWS STORM PREDICTION CENTER NORMAN OK
155 PM EDT FRI JUL 17 2009
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
FAR NORTHEAST NORTH CAROLINA
SOUTHEAST VIRGINIA
COASTAL WATERS
EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 155 PM UNTIL 700
PM EDT.
TORNADOES...HAIL TO 1.5 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 55 STATUTE
MILES EAST AND WEST OF A LINE FROM 20 MILES WEST OF WALLOPS
VIRGINIA TO 40 MILES EAST OF ROANOKE RAPIDS NORTH CAROLINA. FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU4).
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 592...WW 593...
DISCUSSION...ORGANIZED CLUSTER OF TSTMS WITH EMBEDDED SUPERCELLS
REMAINS COINCIDENT WITH MESOLOW DEVELOPING ENEWD THROUGH S-CNTRL VA.
AIR MASS IN ADVANCE OF THESE STORMS IS HOT AND MOIST WITH MLCAPE OF
1000-2000 J/KG. ISALLOBARIC RESPONSE TO SURFACE LOW WILL MAINTAIN A
CORRIDOR OF BACKED LOW-LEVEL WINDS AHEAD OF STORMS...RESULTING IN A
FAVORABLE ENVIRONMENT FOR ISOLATED TORNADOES.
AVIATION...TORNADOES AND 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
500. MEAN STORM MOTION VECTOR 27030.
...MEAD/IMY
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW4
WW 594 TORNADO NC VA CW 171755Z - 172300Z
AXIS..55 STATUTE MILES EAST AND WEST OF LINE..
20W WAL/WALLOPS VA/ - 40E RZZ/ROANOKE RAPIDS NC/
..AVIATION COORDS.. 50NM E/W /29SSW SBY - 41WNW ECG/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 27030.
LAT...LON 37937483 36437600 36437798 37937684
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU4.
Watch 594 Status Report Messages:
STATUS REPORT #4 ON WW 594
VALID 172130Z - 172240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 WNW ECG
TO 30 NW ECG TO 10 SE ORF TO 25 S NHK.
..GRAMS..07/17/09
ATTN...WFO...AKQ...
&&
STATUS REPORT FOR WT 594
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NCC015-029-041-053-139-143-172240-
NC
. NORTH CAROLINA COUNTIES INCLUDED ARE
BERTIE CAMDEN CHOWAN
CURRITUCK PASQUOTANK PERQUIMANS
$$
VAC001-131-810-172240-
VA
. VIRGINIA COUNTIES INCLUDED ARE
ACCOMACK NORTHAMPTON
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
VIRGINIA BEACH
$$
ANZ630-631-633-652-654-656-172240-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
CHESAPEAKE BAY FROM SMITH POINT TO WINDMILL POINT VA
CHESAPEAKE BAY FROM WINDMILL POINT TO NEW POINT COMFORT VA
CURRITUCK SOUND
COASTAL WATERS FROM CHINCOTEAGUE TO PARRAMORE ISLAND VA OUT 20 NM
COASTAL WATERS FROM PARRAMORE ISLAND TO CAPE CHARLES LIGHT VA OUT
20 NM
COASTAL WATERS FROM CAPE CHARLES LIGHT VA TO NC VA BORDER OUT 20
NM
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 594
VALID 172035Z - 172140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM RZZ TO 30
SSE RIC TO 25 SSW NHK.
..MEAD..07/17/09
ATTN...WFO...AKQ...
&&
STATUS REPORT FOR WT 594
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NCC015-029-041-053-073-091-131-139-143-172140-
NC
. NORTH CAROLINA COUNTIES INCLUDED ARE
BERTIE CAMDEN CHOWAN
CURRITUCK GATES HERTFORD
NORTHAMPTON PASQUOTANK PERQUIMANS
$$
VAC001-073-093-095-103-115-119-131-133-175-181-199-550-620-650-
700-710-735-740-800-810-830-172140-
VA
. VIRGINIA COUNTIES INCLUDED ARE
ACCOMACK GLOUCESTER ISLE OF WIGHT
JAMES CITY LANCASTER MATHEWS
MIDDLESEX NORTHAMPTON NORTHUMBERLAND
SOUTHAMPTON SURRY YORK
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
CHESAPEAKE FRANKLIN HAMPTON
NEWPORT NEWS NORFOLK POQUOSON
PORTSMOUTH SUFFOLK VIRGINIA BEACH
WILLIAMSBURG
$$
ANZ630-631-632-633-652-654-656-172140-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
CHESAPEAKE BAY FROM SMITH POINT TO WINDMILL POINT VA
CHESAPEAKE BAY FROM WINDMILL POINT TO NEW POINT COMFORT VA
CHESAPEAKE BAY FROM NEW POINT COMFORT TO CAPE HENRY VA
CURRITUCK SOUND
COASTAL WATERS FROM CHINCOTEAGUE TO PARRAMORE ISLAND VA OUT 20 NM
COASTAL WATERS FROM PARRAMORE ISLAND TO CAPE CHARLES LIGHT VA OUT
20 NM
COASTAL WATERS FROM CAPE CHARLES LIGHT VA TO NC VA BORDER OUT 20
NM
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 594
VALID 171950Z - 172040Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1600.
..MEAD..07/17/09
ATTN...WFO...AKQ...
&&
STATUS REPORT FOR WT 594
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NCC015-029-041-053-073-091-131-139-143-172040-
NC
. NORTH CAROLINA COUNTIES INCLUDED ARE
BERTIE CAMDEN CHOWAN
CURRITUCK GATES HERTFORD
NORTHAMPTON PASQUOTANK PERQUIMANS
$$
VAC001-025-036-053-073-081-093-095-103-115-119-127-131-133-149-
175-181-183-199-550-595-620-650-670-700-710-735-740-800-810-830-
172040-
VA
. VIRGINIA COUNTIES INCLUDED ARE
ACCOMACK BRUNSWICK CHARLES CITY
DINWIDDIE GLOUCESTER GREENSVILLE
ISLE OF WIGHT JAMES CITY LANCASTER
MATHEWS MIDDLESEX NEW KENT
NORTHAMPTON NORTHUMBERLAND PRINCE GEORGE
SOUTHAMPTON SURRY SUSSEX
YORK
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
CHESAPEAKE EMPORIA FRANKLIN
HAMPTON HOPEWELL NEWPORT NEWS
NORFOLK POQUOSON PORTSMOUTH
SUFFOLK VIRGINIA BEACH WILLIAMSBURG
$$
ANZ630-631-632-633-652-654-656-172040-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
CHESAPEAKE BAY FROM SMITH POINT TO WINDMILL POINT VA
CHESAPEAKE BAY FROM WINDMILL POINT TO NEW POINT COMFORT VA
CHESAPEAKE BAY FROM NEW POINT COMFORT TO CAPE HENRY VA
CURRITUCK SOUND
COASTAL WATERS FROM CHINCOTEAGUE TO PARRAMORE ISLAND VA OUT 20 NM
COASTAL WATERS FROM PARRAMORE ISLAND TO CAPE CHARLES LIGHT VA OUT
20 NM
COASTAL WATERS FROM CAPE CHARLES LIGHT VA TO NC VA BORDER OUT 20
NM
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 594
VALID 171850Z - 171940Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..MEAD..07/17/09
ATTN...WFO...AKQ...
&&
STATUS REPORT FOR WT 594
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NCC015-029-041-053-073-091-131-139-143-171940-
NC
. NORTH CAROLINA COUNTIES INCLUDED ARE
BERTIE CAMDEN CHOWAN
CURRITUCK GATES HERTFORD
NORTHAMPTON PASQUOTANK PERQUIMANS
$$
VAC001-025-036-053-073-081-093-095-115-127-131-149-175-181-183-
199-550-595-620-650-670-700-710-735-740-800-810-830-171940-
VA
. VIRGINIA COUNTIES INCLUDED ARE
ACCOMACK BRUNSWICK CHARLES CITY
DINWIDDIE GLOUCESTER GREENSVILLE
ISLE OF WIGHT JAMES CITY MATHEWS
NEW KENT NORTHAMPTON PRINCE GEORGE
SOUTHAMPTON SURRY SUSSEX
YORK
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
CHESAPEAKE EMPORIA FRANKLIN
HAMPTON HOPEWELL NEWPORT NEWS
NORFOLK POQUOSON PORTSMOUTH
SUFFOLK VIRGINIA BEACH WILLIAMSBURG
$$
ANZ630-631-632-633-652-654-656-171940-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
CHESAPEAKE BAY FROM SMITH POINT TO WINDMILL POINT VA
CHESAPEAKE BAY FROM WINDMILL POINT TO NEW POINT COMFORT VA
CHESAPEAKE BAY FROM NEW POINT COMFORT TO CAPE HENRY VA
CURRITUCK SOUND
COASTAL WATERS FROM CHINCOTEAGUE TO PARRAMORE ISLAND VA OUT 20 NM
COASTAL WATERS FROM PARRAMORE ISLAND TO CAPE CHARLES LIGHT VA OUT
20 NM
COASTAL WATERS FROM CAPE CHARLES LIGHT VA TO NC VA BORDER OUT 20
NM
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
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.