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 86
NWS Storm Prediction Center Norman OK
215 AM EDT Wed Apr 8 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Western Maryland
A small part of south central Pennsylvania
Extreme northern Virginia
The eastern West Virginia Panhandle
* Effective this Wednesday morning from 215 AM until 600 AM EDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
Scattered large hail events to 1 inch in diameter possible
SUMMARY...Well-developed squall line in southwestern Pennsylvania
will continue to surge quickly southeastward through the early
morning hours with an attendant threat for damaging gusts. After
crossing the Appalachians, the storms are expected to weaken later
this morning, with a diminishing severe weather threat.
The severe thunderstorm watch area is approximately along and 35
statute miles north and south of a line from 20 miles north of
Martinsburg WV to 85 miles west of Martinsburg WV. 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 84...WW 85...
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
32040.
...Thompson
SEL6
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 86
NWS Storm Prediction Center Norman OK
215 AM EDT Wed Apr 8 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Western Maryland
A small part of south central Pennsylvania
Extreme northern Virginia
The eastern West Virginia Panhandle
* Effective this Wednesday morning from 215 AM until 600 AM EDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
Scattered large hail events to 1 inch in diameter possible
SUMMARY...Well-developed squall line in southwestern Pennsylvania
will continue to surge quickly southeastward through the early
morning hours with an attendant threat for damaging gusts. After
crossing the Appalachians, the storms are expected to weaken later
this morning, with a diminishing severe weather threat.
The severe thunderstorm watch area is approximately along and 35
statute miles north and south of a line from 20 miles north of
Martinsburg WV to 85 miles west of Martinsburg WV. 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 84...WW 85...
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
32040.
...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 86 SEVERE TSTM MD PA VA WV 080615Z - 081000Z
AXIS..35 STATUTE MILES NORTH AND SOUTH OF LINE..
20N MRB/MARTINSBURG WV/ - 85W MRB/MARTINSBURG WV/
..AVIATION COORDS.. 30NM N/S /48WNW EMI - 37NE EKN/
HAIL SURFACE AND ALOFT..1 INCH. WIND GUSTS..60 KNOTS.
MAX TOPS TO 450. MEAN STORM MOTION VECTOR 32040.
LAT...LON 39187798 38887957 39907957 40207798
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU6.
Watch 86 Status Report Messages:
STATUS REPORT #3 ON WW 86
VALID 080835Z - 080940Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 NE EKN TO
35 N SHD.
..GLEASON..04/08/20
ATTN...WFO...LWX...CTP...
&&
STATUS REPORT FOR WS 86
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
WVC031-080940-
WV
. WEST VIRGINIA COUNTIES INCLUDED ARE
HARDY
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 86
VALID 080735Z - 080840Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 NNE EKN
TO 10 W MRB TO 5 W HGR TO 20 E HGR.
..GLEASON..04/08/20
ATTN...WFO...LWX...CTP...
&&
STATUS REPORT FOR WS 86
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MDC043-080840-
MD
. MARYLAND COUNTIES INCLUDED ARE
WASHINGTON
$$
VAC069-840-080840-
VA
. VIRGINIA COUNTIES INCLUDED ARE
FREDERICK
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
WINCHESTER
$$
WVC003-023-027-031-037-080840-
WV
. WEST VIRGINIA COUNTIES INCLUDED ARE
BERKELEY GRANT HAMPSHIRE
HARDY JEFFERSON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 86
VALID 080650Z - 080740Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 ENE MGW
TO 40 SW AOO TO 30 E AOO.
..GLEASON..04/08/20
ATTN...WFO...LWX...CTP...
&&
STATUS REPORT FOR WS 86
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
MDC001-043-080740-
MD
. MARYLAND COUNTIES INCLUDED ARE
ALLEGANY WASHINGTON
$$
PAC009-055-057-080740-
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
BEDFORD FRANKLIN FULTON
$$
VAC069-840-080740-
VA
. VIRGINIA COUNTIES INCLUDED ARE
FREDERICK
VIRGINIA INDEPENDENT CITIES INCLUDED ARE
WINCHESTER
$$
WVC003-023-027-031-037-057-065-080740-
WV
. WEST VIRGINIA COUNTIES INCLUDED ARE
BERKELEY GRANT HAMPSHIRE
HARDY JEFFERSON MINERAL
MORGAN
$$
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 (<5%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (<2%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (50%)
|
Probability of 1 or more wind events > 65 knots
|
Low (20%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (40%)
|
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 (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.
weather.gov 
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