Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL0
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 280
NWS Storm Prediction Center Norman OK
1020 PM EDT Wed Jun 10 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Western New York
Northwest/North-central Pennsylvania
Lake Erie
* Effective this Wednesday night and Thursday morning from 1020
PM until 200 AM EDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
A tornado or two possible
SUMMARY...A fast-moving of storms may continue to pose mostly a
damaging wind threat as storms continue northeastward late this
evening across western New York/northern Pennsylvania. Storms should
gradually weaken by early in the overnight, but strong to severe
thunderstorms will remain a possibility for a few more hours.
The severe thunderstorm watch area is approximately along and 45
statute miles east and west of a line from 55 miles north northeast
of Jamestown NY to 30 miles southeast of Dubois PA. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU0).
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 279...
AVIATION...A few severe thunderstorms with hail surface and aloft to
0.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 450. Mean storm motion vector
25045.
...Guyer
SEL0
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 280
NWS Storm Prediction Center Norman OK
1020 PM EDT Wed Jun 10 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Western New York
Northwest/North-central Pennsylvania
Lake Erie
* Effective this Wednesday night and Thursday morning from 1020
PM until 200 AM EDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
A tornado or two possible
SUMMARY...A fast-moving of storms may continue to pose mostly a
damaging wind threat as storms continue northeastward late this
evening across western New York/northern Pennsylvania. Storms should
gradually weaken by early in the overnight, but strong to severe
thunderstorms will remain a possibility for a few more hours.
The severe thunderstorm watch area is approximately along and 45
statute miles east and west of a line from 55 miles north northeast
of Jamestown NY to 30 miles southeast of Dubois PA. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU0).
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 279...
AVIATION...A few severe thunderstorms with hail surface and aloft to
0.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 450. Mean storm motion vector
25045.
...Guyer
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW0
WW 280 SEVERE TSTM NY PA LE 110220Z - 110600Z
AXIS..45 STATUTE MILES EAST AND WEST OF LINE..
55NNE JHW/JAMESTOWN NY/ - 30SE DUJ/DUBOIS PA/
..AVIATION COORDS.. 40NM E/W /9WSW BUF - 23W PSB/
HAIL SURFACE AND ALOFT..0.5 INCH. WIND GUSTS..60 KNOTS.
MAX TOPS TO 450. MEAN STORM MOTION VECTOR 25045.
LAT...LON 42887794 40877762 40877936 42887972
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU0.
Watch 280 Status Report Messages:
STATUS REPORT #3 ON WW 280
VALID 110430Z - 110540Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 W UNV TO
15 E BFD TO 25 SSE BUF TO 20 SW ROC.
..KERR..06/11/20
ATTN...WFO...BUF...CTP...
&&
STATUS REPORT FOR WS 280
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NYC003-051-121-110540-
NY
. NEW YORK COUNTIES INCLUDED ARE
ALLEGANY LIVINGSTON WYOMING
$$
PAC023-105-110540-
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
CAMERON POTTER
$$
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.
$$
STATUS REPORT #2 ON WW 280
VALID 110350Z - 110440Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 SE DUJ TO
5 N BFD TO 30 N JHW TO 5 SW BUF.
..KERR..06/11/20
ATTN...WFO...BUF...CTP...
&&
STATUS REPORT FOR WS 280
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NYC003-009-029-051-121-110440-
NY
. NEW YORK COUNTIES INCLUDED ARE
ALLEGANY CATTARAUGUS ERIE
LIVINGSTON WYOMING
$$
PAC023-033-047-083-105-110440-
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
CAMERON CLEARFIELD ELK
MCKEAN POTTER
$$
LEZ041-110440-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
DUNKIRK TO BUFFALO NY
$$
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.
$$
STATUS REPORT #1 ON WW 280
VALID 110330Z - 110440Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 S DUJ TO
25 SW BFD TO 30 SSW JHW.
..KERR..06/11/20
ATTN...WFO...BUF...CTP...
&&
STATUS REPORT FOR WS 280
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
NYC003-009-013-029-051-121-110440-
NY
. NEW YORK COUNTIES INCLUDED ARE
ALLEGANY CATTARAUGUS CHAUTAUQUA
ERIE LIVINGSTON WYOMING
$$
PAC023-033-047-083-105-123-110440-
PA
. PENNSYLVANIA COUNTIES INCLUDED ARE
CAMERON CLEARFIELD ELK
MCKEAN POTTER WARREN
$$
LEZ040-041-110440-
CW
. ADJACENT COASTAL WATERS INCLUDED ARE
RIPLEY TO DUNKIRK NY
DUNKIRK TO BUFFALO NY
$$
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 (EF2-EF5) tornadoes
|
Low (<2%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (40%)
|
Probability of 1 or more wind events > 65 knots
|
Low (<5%)
|
Hail
Probability of 10 or more severe hail events
|
Low (<5%)
|
Probability of 1 or more hailstones > 2 inches
|
Low (<5%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
Mod (50%)
|
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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