Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL6
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 186
NWS Storm Prediction Center Norman OK
555 PM EDT Mon May 1 2017
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
District Of Columbia
Northern Maryland
Central North Carolina
South central Pennsylvania
Central and northern Virginia
The eastern West Virginia Panhandle
Coastal Waters
* Effective this Monday afternoon and evening from 555 PM until
1100 PM EDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
Isolated large hail events to 1 inch in diameter possible
SUMMARY...Broken bands of strong/severe storms will persist through
the evening with a primary risk for damaging winds, prior to the
convection weakening tonight.
The severe thunderstorm watch area is approximately along and 65
statute miles east and west of a line from 30 miles northeast of
Martinsburg WV to 25 miles west southwest of Southern Pines NC. For
a complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU6).
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.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 185...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few
cumulonimbi with maximum tops to 450. Mean storm motion vector
24040.
...Thompson
SEL6
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 186
NWS Storm Prediction Center Norman OK
555 PM EDT Mon May 1 2017
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
District Of Columbia
Northern Maryland
Central North Carolina
South central Pennsylvania
Central and northern Virginia
The eastern West Virginia Panhandle
Coastal Waters
* Effective this Monday afternoon and evening from 555 PM until
1100 PM EDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
Isolated large hail events to 1 inch in diameter possible
SUMMARY...Broken bands of strong/severe storms will persist through
the evening with a primary risk for damaging winds, prior to the
convection weakening tonight.
The severe thunderstorm watch area is approximately along and 65
statute miles east and west of a line from 30 miles northeast of
Martinsburg WV to 25 miles west southwest of Southern Pines NC. For
a complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU6).
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.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 185...
AVIATION...A few severe thunderstorms with hail surface and aloft to
1 inch. Extreme turbulence and surface wind gusts to 60 knots. A few
cumulonimbi with maximum tops to 450. Mean storm motion vector
24040.
...Thompson
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW6
WW 186 SEVERE TSTM DC MD NC PA VA WV CW 012155Z - 020300Z
AXIS..65 STATUTE MILES EAST AND WEST OF LINE..
30NE MRB/MARTINSBURG WV/ - 25WSW SOP/SOUTHERN PINES NC/
..AVIATION COORDS.. 55NM E/W /30WNW EMI - 51N FLO/
HAIL SURFACE AND ALOFT..1 INCH. WIND GUSTS..60 KNOTS.
MAX TOPS TO 450. MEAN STORM MOTION VECTOR 24040.
LAT...LON 39707636 35087863 35088094 39707880
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU6.
Watch 186 Status Report Messages:
STATUS REPORT #2 ON WW 186
VALID 020035Z - 020140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 SW SOP TO
40 ENE DAN TO 20 E CHO TO 35 WSW NHK.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 629.
..LEITMAN..05/02/17
ATTN...WFO...LWX...RAH...RNK...CTP...AKQ...
&&
STATUS REPORT FOR WS 186
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NCC037-063-069-077-085-093-105-125-165-181-183-185-020140-
NC
. NORTH CAROLINA COUNTIES INCLUDED ARE
CHATHAM DURHAM FRANKLIN
GRANVILLE HARNETT HOKE
LEE MOORE SCOTLAND
VANCE WAKE WARREN
$$
PAC001-041-043-055-071-075-099-107-133-020140-
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
ADAMS CUMBERLAND DAUPHIN
FRANKLIN LANCASTER LEBANON
PERRY SCHUYLKILL YORK
$$
VAC007-025-033-041-049-053-075-085-087-109-111-117-135-145-147-
760-020140-
VA
. VIRGINIA COUNTIES INCLUDED ARE
AMELIA BRUNSWICK CAROLINE
CHESTERFIELD CUMBERLAND DINWIDDIE
GOOCHLAND HANOVER HENRICO
LOUISA LUNENBURG MECKLENBURG
NOTTOWAY POWHATAN PRINCE EDWARD
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
RICHMOND
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 186
VALID 012330Z - 020040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 45 WSW SOP
TO 25 SSW DAN TO 15 E LYH TO 35 WSW SHD.
..LEITMAN..05/01/17
ATTN...WFO...LWX...RAH...RNK...CTP...AKQ...
&&
STATUS REPORT FOR WS 186
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
DCC001-020040-
DC
. DISTRICT OF COLUMBIA COUNTIES INCLUDED ARE
DISTRICT OF COLUMBIA
$$
MDC001-005-013-017-021-025-027-031-033-043-510-020040-
MD
. MARYLAND COUNTIES INCLUDED ARE
ALLEGANY BALTIMORE CARROLL
CHARLES FREDERICK HARFORD
HOWARD MONTGOMERY PRINCE GEORGES
WASHINGTON
MARYLAND INDEPENDENT CITIES INCLUDED ARE
BALTIMORE CITY
$$
NCC001-037-063-069-077-085-093-105-125-135-145-153-165-181-183-
185-020040-
NC
. NORTH CAROLINA COUNTIES INCLUDED ARE
ALAMANCE CHATHAM DURHAM
FRANKLIN GRANVILLE HARNETT
HOKE LEE MOORE
ORANGE PERSON RICHMOND
SCOTLAND VANCE WAKE
WARREN
$$
PAC001-041-043-055-071-075-099-107-133-020040-
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
ADAMS CUMBERLAND DAUPHIN
FRANKLIN LANCASTER LEBANON
PERRY SCHUYLKILL YORK
$$
VAC003-007-011-013-015-025-029-031-033-037-041-043-047-049-053-
059-061-065-069-075-079-083-085-087-091-099-107-109-111-113-117-
125-135-137-139-145-147-153-157-165-171-177-179-187-510-540-600-
610-630-660-683-685-760-790-820-840-020040-
VA
. VIRGINIA COUNTIES INCLUDED ARE
ALBEMARLE AMELIA APPOMATTOX
ARLINGTON AUGUSTA BRUNSWICK
BUCKINGHAM CAMPBELL CAROLINE
CHARLOTTE CHESTERFIELD CLARKE
CULPEPER CUMBERLAND DINWIDDIE
FAIRFAX FAUQUIER FLUVANNA
FREDERICK GOOCHLAND GREENE
HALIFAX HANOVER HENRICO
HIGHLAND KING GEORGE LOUDOUN
LOUISA LUNENBURG MADISON
MECKLENBURG NELSON NOTTOWAY
ORANGE PAGE POWHATAN
PRINCE EDWARD PRINCE WILLIAM RAPPAHANNOCK
ROCKINGHAM SHENANDOAH SPOTSYLVANIA
STAFFORD WARREN
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
ALEXANDRIA CHARLOTTESVILLE FAIRFAX
FALLS CHURCH FREDERICKSBURG HARRISONBURG
MANASSAS MANASSAS PARK RICHMOND
STAUNTON WAYNESBORO WINCHESTER
$$
WVC003-023-027-031-037-057-065-071-020040-
WV
. WEST VIRGINIA COUNTIES INCLUDED ARE
BERKELEY GRANT HAMPSHIRE
HARDY JEFFERSON MINERAL
MORGAN PENDLETON
$$
ANZ530-531-535-536-538-020040-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
CHESAPEAKE BAY NORTH OF POOLES ISLAND MD
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
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 (40%)
|
Probability of 1 or more wind events > 65 knots
|
Low (10%)
|
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 (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.
weather.gov 
@NWSSPC
