Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL1
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 471
NWS Storm Prediction Center Norman OK
710 PM EDT Sat Aug 29 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Connecticut
Massachusetts
Southern New Hampshire
Southeast New York
* Effective this Saturday night from 710 PM until Midnight EDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
Isolated large hail events to 1 inch in diameter possible
A tornado or two possible
SUMMARY...A supercell or two may precede an eastward-moving band of
storms across far eastern New York early this evening. Isolated
damaging wind gusts are the primary hazard, but marginally severe
hail and a brief tornado cannot be ruled out.
The severe thunderstorm watch area is approximately along and 55
statute miles east and west of a line from 10 miles east northeast
of Keene NH to 20 miles east southeast of Poughkeepsie NY. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU1).
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 469...WW 470...
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
27030.
...Guyer
SEL1
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 471
NWS Storm Prediction Center Norman OK
710 PM EDT Sat Aug 29 2020
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Connecticut
Massachusetts
Southern New Hampshire
Southeast New York
* Effective this Saturday night from 710 PM until Midnight EDT.
* Primary threats include...
Scattered damaging wind gusts to 70 mph possible
Isolated large hail events to 1 inch in diameter possible
A tornado or two possible
SUMMARY...A supercell or two may precede an eastward-moving band of
storms across far eastern New York early this evening. Isolated
damaging wind gusts are the primary hazard, but marginally severe
hail and a brief tornado cannot be ruled out.
The severe thunderstorm watch area is approximately along and 55
statute miles east and west of a line from 10 miles east northeast
of Keene NH to 20 miles east southeast of Poughkeepsie NY. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU1).
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 469...WW 470...
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
27030.
...Guyer
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW1
WW 471 SEVERE TSTM CT MA NH NY 292310Z - 300400Z
AXIS..55 STATUTE MILES EAST AND WEST OF LINE..
10ENE EEN/KEENE NH/ - 20ESE POU/POUGHKEEPSIE NY/
..AVIATION COORDS.. 50NM E/W /27SW CON - 45SW BDL/
HAIL SURFACE AND ALOFT..1 INCH. WIND GUSTS..60 KNOTS.
MAX TOPS TO 450. MEAN STORM MOTION VECTOR 27030.
LAT...LON 42957100 41517246 41517458 42957317
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU1.
Watch 471 Status Report Messages:
STATUS REPORT #2 ON WW 471
VALID 300135Z - 300240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 SE POU TO
25 WSW BDL TO 10 WSW BDL TO 25 NE BAF TO 15 SSE EEN TO 20 ENE EEN.
..JEWELL..08/30/20
ATTN...WFO...BOX...ALY...GYX...
&&
STATUS REPORT FOR WS 471
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
CTC003-005-013-300240-
CT
. CONNECTICUT COUNTIES INCLUDED ARE
HARTFORD LITCHFIELD TOLLAND
$$
MAC011-013-015-027-300240-
MA
. MASSACHUSETTS COUNTIES INCLUDED ARE
FRANKLIN HAMPDEN HAMPSHIRE
WORCESTER
$$
NYC027-300240-
NY
. NEW YORK COUNTIES INCLUDED ARE
DUTCHESS
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 471
VALID 292345Z - 300040Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1637
..JEWELL..08/29/20
ATTN...WFO...BOX...ALY...GYX...
&&
STATUS REPORT FOR WS 471
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
CTC003-005-013-300040-
CT
. CONNECTICUT COUNTIES INCLUDED ARE
HARTFORD LITCHFIELD TOLLAND
$$
MAC011-013-015-027-300040-
MA
. MASSACHUSETTS COUNTIES INCLUDED ARE
FRANKLIN HAMPDEN HAMPSHIRE
WORCESTER
$$
NHC005-300040-
NH
. NEW HAMPSHIRE COUNTIES INCLUDED ARE
CHESHIRE
$$
NYC027-111-300040-
NY
. NEW YORK COUNTIES INCLUDED ARE
DUTCHESS ULSTER
$$
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 (5%)
|
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 (20%)
|
Probability of 1 or more hailstones > 2 inches
|
Low (<5%)
|
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% (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 
@NWSSPC
