Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for
Watch Status Reports.
SEL4
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 204
NWS STORM PREDICTION CENTER NORMAN OK
205 PM EDT TUE MAY 21 2013
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHERN CONNECTICUT
WESTERN AND CENTRAL MASSACHUSETTS
SOUTHERN NEW HAMPSHIRE
NORTHERN RHODE ISLAND
* EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 205 PM UNTIL
900 PM EDT.
* PRIMARY THREATS INCLUDE...
SEVERAL LARGE HAIL EVENTS WITH A FEW VERY LARGE HAIL EVENTS TO 2
INCHES IN DIAMETER POSSIBLE
SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 40
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 15 MILES WEST OF
WESTFIELD MASSACHUSETTS TO 30 MILES NORTH NORTHEAST OF PROVIDENCE
RHODE ISLAND. 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.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 201...WW 202...WW 203...
DISCUSSION...AT LEAST SCATTERED VIGOROUS THUNDERSTORM DEVELOPMENT IS
EXPECTED ACROSS PARTS OF SOUTHERN NEW ENGLAND THIS
AFTERNOON...WITHIN THE WARM SECTOR OF A WEAK FRONTAL WAVE. FAIRLY
STEEP MID-LEVEL LAPSE RATES ARE CONTRIBUTING TO SIZABLE CAPE...IN
THE PRESENCE OF MODESTLY STRONG DEEP LAYER SHEAR BENEATH 30-40 KT
WESTNORTHWESTERLY 500 MB FLOW. SUPERCELL STRUCTURES APPEAR
POSSIBLE...CONTRIBUTING TO THE RISK FOR SEVERE HAIL AND POTENTIALLY
DAMAGING WIND GUSTS.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 29025.
...KERR
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW4
WW 204 SEVERE TSTM CT MA NH RI 211805Z - 220100Z
AXIS..40 STATUTE MILES NORTH AND SOUTH OF LINE..
15W BAF/WESTFIELD MA/ - 30NNE PVD/PROVIDENCE RI/
..AVIATION COORDS.. 35NM N/S /19NW BDL - 17SW BOS/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 29025.
LAT...LON 42727301 42707120 41547120 41567301
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU4.
Watch 204 Status Report Messages:
STATUS REPORT #5 ON WW 204
VALID 212355Z - 220040Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..MEAD..05/21/13
ATTN...WFO...BOX...
&&
STATUS REPORT FOR WS 204
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
CTC003-013-015-220040-
CT
. CONNECTICUT COUNTIES INCLUDED ARE
HARTFORD TOLLAND WINDHAM
$$
MAC011-013-015-027-220040-
MA
. MASSACHUSETTS COUNTIES INCLUDED ARE
FRANKLIN HAMPDEN HAMPSHIRE
WORCESTER
$$
NHC005-220040-
NH
. NEW HAMPSHIRE COUNTIES INCLUDED ARE
CHESHIRE
$$
RIC003-007-220040-
RI
. RHODE ISLAND COUNTIES INCLUDED ARE
KENT PROVIDENCE
$$
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.
$$
STATUS REPORT #4 ON WW 204
VALID 212240Z - 212340Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..MEAD..05/21/13
ATTN...WFO...BOX...
&&
STATUS REPORT FOR WS 204
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
CTC003-013-015-212340-
CT
. CONNECTICUT COUNTIES INCLUDED ARE
HARTFORD TOLLAND WINDHAM
$$
MAC011-013-015-027-212340-
MA
. MASSACHUSETTS COUNTIES INCLUDED ARE
FRANKLIN HAMPDEN HAMPSHIRE
WORCESTER
$$
NHC005-212340-
NH
. NEW HAMPSHIRE COUNTIES INCLUDED ARE
CHESHIRE
$$
RIC003-007-212340-
RI
. RHODE ISLAND COUNTIES INCLUDED ARE
KENT PROVIDENCE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 204
VALID 212135Z - 212240Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..MEAD..05/21/13
ATTN...WFO...BOX...
&&
STATUS REPORT FOR WS 204
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
CTC003-013-015-212240-
CT
. CONNECTICUT COUNTIES INCLUDED ARE
HARTFORD TOLLAND WINDHAM
$$
MAC011-013-015-027-212240-
MA
. MASSACHUSETTS COUNTIES INCLUDED ARE
FRANKLIN HAMPDEN HAMPSHIRE
WORCESTER
$$
NHC005-212240-
NH
. NEW HAMPSHIRE COUNTIES INCLUDED ARE
CHESHIRE
$$
RIC003-007-212240-
RI
. RHODE ISLAND COUNTIES INCLUDED ARE
KENT PROVIDENCE
$$
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.
$$
STATUS REPORT #2 ON WW 204
VALID 212045Z - 212140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 757
..ROGERS..05/21/13
ATTN...WFO...BOX...
&&
STATUS REPORT FOR WS 204
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
CTC003-013-015-212140-
CT
. CONNECTICUT COUNTIES INCLUDED ARE
HARTFORD TOLLAND WINDHAM
$$
MAC011-013-015-027-212140-
MA
. MASSACHUSETTS COUNTIES INCLUDED ARE
FRANKLIN HAMPDEN HAMPSHIRE
WORCESTER
$$
NHC005-212140-
NH
. NEW HAMPSHIRE COUNTIES INCLUDED ARE
CHESHIRE
$$
RIC003-007-212140-
RI
. RHODE ISLAND COUNTIES INCLUDED ARE
KENT PROVIDENCE
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 204
VALID 212000Z - 212140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..ROGERS..05/21/13
ATTN...WFO...BOX...
&&
STATUS REPORT FOR WS 204
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
CTC003-013-015-212140-
CT
. CONNECTICUT COUNTIES INCLUDED ARE
HARTFORD TOLLAND WINDHAM
$$
MAC011-013-015-027-212140-
MA
. MASSACHUSETTS COUNTIES INCLUDED ARE
FRANKLIN HAMPDEN HAMPSHIRE
WORCESTER
$$
NHC005-212140-
NH
. NEW HAMPSHIRE COUNTIES INCLUDED ARE
CHESHIRE
$$
RIC003-007-212140-
RI
. RHODE ISLAND COUNTIES INCLUDED ARE
KENT PROVIDENCE
$$
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 (30%)
|
Probability of 1 or more wind events > 65 knots
|
Low (10%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (30%)
|
Probability
of 1 or
more hailstones > 2 inches
|
Mod (30%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
Mod (60%)
|
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
