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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 634
NWS Storm Prediction Center Norman OK
200 PM EDT Sun Aug 18 2024
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
District Of Columbia
Delaware
Central and Eastern Maryland
New Jersey
Southeast New York
Eastern Pennsylvania
Northern Virginia
Eastern Panhandle of West Virginia
Coastal Waters
* Effective this Sunday afternoon and evening from 200 PM until
1000 PM EDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph likely
Isolated large hail events to 1.5 inches in diameter possible
SUMMARY...Scattered thunderstorms will increase in coverage through
the afternoon across the watch area. The more intense storms will
pose a risk of locally damaging wind gusts and hail.
The severe thunderstorm watch area is approximately along and 85
statute miles east and west of a line from 55 miles east of
Charlottesville VA to 40 miles east northeast of Wilkesbarre PA. For
a complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU4).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
&&
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 500. Mean storm motion vector
24025.
...Hart
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW4
WW 634 SEVERE TSTM DC DE MD NJ NY PA VA WV CW 181800Z - 190200Z
AXIS..85 STATUTE MILES EAST AND WEST OF LINE..
55E CHO/CHARLOTTESVILLE VA/ - 40ENE AVP/WILKESBARRE PA/
..AVIATION COORDS.. 75NM E/W /37SSE CSN - 34SSE HNK/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 24025.
LAT...LON 38127900 41547665 41547336 38127587
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU4.
Watch 634 Status Report Messages:
STATUS REPORT #2 ON WW 634
VALID 182135Z - 182Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..WENDT..08/18/24
ATTN...WFO...LWX...PHI...AKQ...OKX...BGM...CTP...
&&
STATUS REPORT FOR WS 634
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
DEC001-003-005-182240-
DE
. DELAWARE COUNTIES INCLUDED ARE
KENT NEW CASTLE SUSSEX
$$
DCC001-182240-
DC
. DISTRICT OF COLUMBIA COUNTIES INCLUDED ARE
DISTRICT OF COLUMBIA
$$
MDC003-005-009-011-013-015-017-019-021-025-027-029-031-033-035-
037-039-041-043-045-047-510-182240-
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
WASHINGTON WICOMICO WORCESTER
MARYLAND INDEPENDENT CITIES INCLUDED ARE
BALTIMORE CITY
$$
NJC001-003-005-007-009-011-013-015-017-019-021-023-025-027-029-
031-033-035-037-039-041-182240-
NJ
. NEW JERSEY COUNTIES INCLUDED ARE
ATLANTIC BERGEN BURLINGTON
CAMDEN CAPE MAY CUMBERLAND
ESSEX GLOUCESTER HUDSON
HUNTERDON MERCER MIDDLESEX
MONMOUTH MORRIS OCEAN
PASSAIC SALEM SOMERSET
SUSSEX UNION WARREN
$$
NYC005-025-047-061-071-079-081-085-087-105-119-182240-
NY
. NEW YORK COUNTIES INCLUDED ARE
BRONX DELAWARE KINGS
NEW YORK (MANHATTAN) ORANGE PUTNAM
QUEENS RICHMOND ROCKLAND
SULLIVAN WESTCHESTER
$$
PAC001-011-017-025-029-037-041-043-045-055-069-071-075-077-079-
089-091-093-095-097-099-101-103-107-115-127-131-133-182240-
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
ADAMS BERKS BUCKS
CARBON CHESTER COLUMBIA
CUMBERLAND DAUPHIN DELAWARE
FRANKLIN LACKAWANNA LANCASTER
LEBANON LEHIGH LUZERNE
MONROE MONTGOMERY MONTOUR
NORTHAMPTON NORTHUMBERLAND PERRY
PHILADELPHIA PIKE SCHUYLKILL
SUSQUEHANNA WAYNE WYOMING
YORK
$$
VAC003-013-015-043-047-059-061-069-079-099-107-113-125-137-139-
153-157-165-171-177-179-187-510-540-600-610-630-660-683-685-790-
820-840-182240-
VA
. VIRGINIA COUNTIES INCLUDED ARE
ALBEMARLE ARLINGTON AUGUSTA
CLARKE CULPEPER FAIRFAX
FAUQUIER FREDERICK GREENE
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
$$
WVC003-037-182240-
WV
. WEST VIRGINIA COUNTIES INCLUDED ARE
BERKELEY JEFFERSON
$$
ANZ338-430-431-530-531-532-533-534-535-536-537-538-539-540-541-
542-543-182240-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
NEW YORK HARBOR
DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE
DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE
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 634
VALID 181955Z - 182Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..BENTLEY..08/18/24
ATTN...WFO...LWX...PHI...AKQ...OKX...BGM...CTP...
&&
STATUS REPORT FOR WS 634
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
DEC001-003-005-182040-
DE
. DELAWARE COUNTIES INCLUDED ARE
KENT NEW CASTLE SUSSEX
$$
DCC001-182040-
DC
. DISTRICT OF COLUMBIA COUNTIES INCLUDED ARE
DISTRICT OF COLUMBIA
$$
MDC003-005-009-011-013-015-017-019-021-025-027-029-031-033-035-
037-039-041-043-045-047-510-182040-
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
WASHINGTON WICOMICO WORCESTER
MARYLAND INDEPENDENT CITIES INCLUDED ARE
BALTIMORE CITY
$$
NJC001-003-005-007-009-011-013-015-017-019-021-023-025-027-029-
031-033-035-037-039-041-182040-
NJ
. NEW JERSEY COUNTIES INCLUDED ARE
ATLANTIC BERGEN BURLINGTON
CAMDEN CAPE MAY CUMBERLAND
ESSEX GLOUCESTER HUDSON
HUNTERDON MERCER MIDDLESEX
MONMOUTH MORRIS OCEAN
PASSAIC SALEM SOMERSET
SUSSEX UNION WARREN
$$
NYC005-025-047-061-071-079-081-085-087-105-119-182040-
NY
. NEW YORK COUNTIES INCLUDED ARE
BRONX DELAWARE KINGS
NEW YORK (MANHATTAN) ORANGE PUTNAM
QUEENS RICHMOND ROCKLAND
SULLIVAN WESTCHESTER
$$
PAC001-011-017-025-029-037-041-043-045-055-069-071-075-077-079-
089-091-093-095-097-099-101-103-107-115-127-131-133-182040-
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
ADAMS BERKS BUCKS
CARBON CHESTER COLUMBIA
CUMBERLAND DAUPHIN DELAWARE
FRANKLIN LACKAWANNA LANCASTER
LEBANON LEHIGH LUZERNE
MONROE MONTGOMERY MONTOUR
NORTHAMPTON NORTHUMBERLAND PERRY
PHILADELPHIA PIKE SCHUYLKILL
SUSQUEHANNA WAYNE WYOMING
YORK
$$
VAC003-013-015-043-047-059-061-069-079-099-107-113-125-137-139-
153-157-165-171-177-179-187-510-540-600-610-630-660-683-685-790-
820-840-182040-
VA
. VIRGINIA COUNTIES INCLUDED ARE
ALBEMARLE ARLINGTON AUGUSTA
CLARKE CULPEPER FAIRFAX
FAUQUIER FREDERICK GREENE
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
$$
WVC003-037-182040-
WV
. WEST VIRGINIA COUNTIES INCLUDED ARE
BERKELEY JEFFERSON
$$
ANZ338-430-431-530-531-532-533-534-535-536-537-538-539-540-541-
542-543-182040-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
NEW YORK HARBOR
DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE
DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE
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
|
Low (10%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (<2%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (60%)
|
Probability of 1 or more wind events > 65 knots
|
Low (20%)
|
Hail
Probability of 10 or more severe hail events
|
Low (20%)
|
Probability of 1 or more hailstones > 2 inches
|
Low (10%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (80%)
|
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% (EF2-EF5 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.
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