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.
SEL1
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 501
NWS STORM PREDICTION CENTER NORMAN OK
255 PM EDT TUE JUN 10 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
DISTRICT OF COLUMBIA
WESTERN AND CENTRAL MARYLAND
CENTRAL NEW YORK
CENTRAL AND NORTHEAST PENNSYLVANIA
NORTHERN VIRGINIA
EASTERN WEST VIRGINIA PANHANDLE
LAKE ONTARIO
COASTAL WATERS
EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 255 PM UNTIL
1000 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 55
STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES EAST
SOUTHEAST OF STAUNTON VIRGINIA TO 30 MILES NORTH NORTHWEST OF
UTICA NEW YORK. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).
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 499...WW 500...
DISCUSSION...THUNDERSTORMS ARE LIKELY TO INTENSIFY RAPIDLY THIS
AFTERNOON ALONG WEST EDGE OF VERY UNSTABLE AIR EXTENDING FROM
CENTRAL NY INTO NORTHERN VA. MULTICELL TO SUPERCELL STORMS CAPABLE
OF DAMAGING WINDS AND HAIL ARE ANTICIPATED THROUGH THE EVENING.
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 500. MEAN STORM
MOTION VECTOR 25035.
...HART
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW1
WW 501 SEVERE TSTM DC MD NY PA VA WV LO CW 101855Z - 110200Z
AXIS..55 STATUTE MILES EAST AND WEST OF LINE..
20ESE SHD/STAUNTON VA/ - 30NNW UCA/UTICA NY/
..AVIATION COORDS.. 50NM E/W /43SW CSN - 35NE SYR/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 25035.
LAT...LON 38157956 43547670 43547451 38157755
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU1.
Watch 501 Status Report Messages:
STATUS REPORT #3 ON WW 501
VALID 110045Z - 110140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM CHO TO 15 NW
BWI.
..SPC..06/11/08
ATTN...WFO...LWX...BGM...BUF...CTP...
&&
STATUS REPORT FOR WS 501
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
DCC001-110140-
DC
. DISTRICT OF COLUMBIA COUNTIES INCLUDED ARE
DISTRICT OF COLUMBIA
$$
MDC003-005-009-017-025-027-031-033-037-510-110140-
MD
. MARYLAND COUNTIES INCLUDED ARE
ANNE ARUNDEL BALTIMORE CALVERT
CHARLES HARFORD HOWARD
MONTGOMERY PRINCE GEORGES ST. MARYS
MARYLAND INDEPENDENT CITIES INCLUDED ARE
BALTIMORE CITY
$$
NYC025-105-110140-
NY
. NEW YORK COUNTIES INCLUDED ARE
DELAWARE SULLIVAN
$$
PAC103-127-110140-
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
PIKE WAYNE
$$
VAC003-013-047-059-061-099-125-137-153-177-179-510-540-600-610-
630-683-685-110140-
VA
. VIRGINIA COUNTIES INCLUDED ARE
ALBEMARLE ARLINGTON CULPEPER
FAIRFAX FAUQUIER KING GEORGE
NELSON ORANGE PRINCE WILLIAM
SPOTSYLVANIA STAFFORD
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
ALEXANDRIA CHARLOTTESVILLE FAIRFAX
FALLS CHURCH FREDERICKSBURG MANASSAS
MANASSAS PARK
$$
ANZ530-531-532-533-534-535-536-537-110140-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
CHESAPEAKE BAY NORTH OF POOLES ISLAND MD
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD
CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD
TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA
$$
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.
$$
STATUS REPORT #2 ON WW 501
VALID 102335Z - 110040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 N UNV TO
45 NE UCA.
..SPC..06/10/08
ATTN...WFO...LWX...BGM...BUF...CTP...
&&
STATUS REPORT FOR WS 501
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
DCC001-110040-
DC
. DISTRICT OF COLUMBIA COUNTIES INCLUDED ARE
DISTRICT OF COLUMBIA
$$
MDC001-003-005-009-013-017-021-025-027-031-033-037-043-510-
110040-
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
$$
NYC007-015-017-023-025-053-065-077-105-107-109-110040-
NY
. NEW YORK COUNTIES INCLUDED ARE
BROOME CHEMUNG CHENANGO
CORTLAND DELAWARE MADISON
ONEIDA OTSEGO SULLIVAN
TIOGA TOMPKINS
$$
PAC001-009-013-015-027-035-037-041-043-055-057-061-067-069-071-
075-079-081-087-093-097-099-103-107-109-113-115-117-119-127-131-
133-110040-
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
ADAMS BEDFORD BLAIR
BRADFORD CENTRE CLINTON
COLUMBIA CUMBERLAND DAUPHIN
FRANKLIN FULTON HUNTINGDON
JUNIATA LACKAWANNA LANCASTER
LEBANON LUZERNE LYCOMING
MIFFLIN MONTOUR NORTHUMBERLAND
PERRY PIKE SCHUYLKILL
SNYDER SULLIVAN SUSQUEHANNA
TIOGA UNION WAYNE
WYOMING YORK
$$
VAC003-013-015-043-047-059-061-069-079-091-099-107-113-125-137-
139-153-157-165-171-177-179-187-510-540-600-610-630-660-683-685-
790-820-840-110040-
VA
. VIRGINIA COUNTIES INCLUDED ARE
ALBEMARLE ARLINGTON AUGUSTA
CLARKE CULPEPER FAIRFAX
FAUQUIER FREDERICK GREENE
HIGHLAND KING GEORGE LOUDOUN
MADISON NELSON ORANGE
PAGE PRINCE WILLIAM RAPPAHANNOCK
ROCKINGHAM SHENANDOAH SPOTSYLVANIA
STAFFORD WARREN
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
ALEXANDRIA CHARLOTTESVILLE FAIRFAX
FALLS CHURCH FREDERICKSBURG HARRISONBURG
MANASSAS MANASSAS PARK STAUNTON
WAYNESBORO WINCHESTER
$$
WVC003-023-027-031-037-057-065-071-110040-
WV
. WEST VIRGINIA COUNTIES INCLUDED ARE
BERKELEY GRANT HAMPSHIRE
HARDY JEFFERSON MINERAL
MORGAN PENDLETON
$$
ANZ530-531-532-533-534-535-536-537-110040-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
CHESAPEAKE BAY NORTH OF POOLES ISLAND MD
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD
CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD
TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA
$$
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.
$$
STATUS REPORT #1 ON WW 501
VALID 102045Z - 102140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..DIAL..06/10/08
ATTN...WFO...LWX...BGM...BUF...CTP...
&&
STATUS REPORT FOR WS 501
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
DCC001-102140-
DC
. DISTRICT OF COLUMBIA COUNTIES INCLUDED ARE
DISTRICT OF COLUMBIA
$$
MDC001-003-005-009-013-017-021-025-027-031-033-037-043-510-
102140-
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
$$
NYC007-011-015-017-023-025-045-049-053-065-067-069-075-077-097-
099-101-105-107-109-117-123-102140-
NY
. NEW YORK COUNTIES INCLUDED ARE
BROOME CAYUGA CHEMUNG
CHENANGO CORTLAND DELAWARE
JEFFERSON LEWIS MADISON
ONEIDA ONONDAGA ONTARIO
OSWEGO OTSEGO SCHUYLER
SENECA STEUBEN SULLIVAN
TIOGA TOMPKINS WAYNE
YATES
$$
PAC001-009-013-015-027-035-037-041-043-055-057-061-067-069-071-
075-079-081-087-093-097-099-103-107-109-113-115-117-119-127-131-
133-102140-
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
ADAMS BEDFORD BLAIR
BRADFORD CENTRE CLINTON
COLUMBIA CUMBERLAND DAUPHIN
FRANKLIN FULTON HUNTINGDON
JUNIATA LACKAWANNA LANCASTER
LEBANON LUZERNE LYCOMING
MIFFLIN MONTOUR NORTHUMBERLAND
PERRY PIKE SCHUYLKILL
SNYDER SULLIVAN SUSQUEHANNA
TIOGA UNION WAYNE
WYOMING YORK
$$
VAC003-013-015-043-047-059-061-069-079-091-099-107-113-125-137-
139-153-157-165-171-177-179-187-510-540-600-610-630-660-683-685-
790-820-840-102140-
VA
. VIRGINIA COUNTIES INCLUDED ARE
ALBEMARLE ARLINGTON AUGUSTA
CLARKE CULPEPER FAIRFAX
FAUQUIER FREDERICK GREENE
HIGHLAND KING GEORGE LOUDOUN
MADISON NELSON ORANGE
PAGE PRINCE WILLIAM RAPPAHANNOCK
ROCKINGHAM SHENANDOAH SPOTSYLVANIA
STAFFORD WARREN
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
ALEXANDRIA CHARLOTTESVILLE FAIRFAX
FALLS CHURCH FREDERICKSBURG HARRISONBURG
MANASSAS MANASSAS PARK STAUNTON
WAYNESBORO WINCHESTER
$$
WVC003-023-027-031-037-057-065-071-102140-
WV
. WEST VIRGINIA COUNTIES INCLUDED ARE
BERKELEY GRANT HAMPSHIRE
HARDY JEFFERSON MINERAL
MORGAN PENDLETON
$$
ANZ530-531-532-533-534-535-536-537-LOZ044-045-064-065-102140-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
SODUS BAY TO MEXICO BAY NY
MEXICO BAY NY TO THE ST. LAWRENCE RIVER
SODUS BAY TO MEXICO BAY NY BEYOND 5NM OFF SHORELINE TO
US/CANADIAN BORDER
MEXICO BAY NY TO THE ST. LAWRENCE RIVER BEYOND 5NM OFF SHORELINE
TO US/CANADIAN BORDER
CHESAPEAKE BAY NORTH OF POOLES ISLAND MD
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD
CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD
TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA
$$
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 (20%)
|
Probability of 1 or more strong (F2-F5) tornadoes
|
Low (5%)
|
Wind
Probability of 10 or more severe wind events
|
High (70%)
|
Probability of 1 or more wind events > 65 knots
|
Mod (30%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (50%)
|
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 (90%)
|
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.