Severe Thunderstorm Watch 331

Issued

Jun 2, 2007, 1:50 PM EDT (17:50 UTC)

Expired

Jun 2, 2007, 8:00 PM EDT

In force

6 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

The Burlington radar (KCXX), 75 km from the middle of the area, began a volume at 17:52 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Two or more tornadoes

20%

One or more EF2 to EF5 tornadoes

5%

Ten or more severe wind reports

30%

One or more gusts of 65 knots or more

20%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 965Jun 2, 1:14 PM EDT
• Mesoscale Discussion 969Jun 2, 6:42 PM EDT

000
WWUS20 KWNS 021753
SEL1  
SPC WW 021753
CTZ000-MAZ000-MEZ000-NHZ000-NYZ000-RIZ000-VTZ000-CWZ000-030000-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 331
NWS STORM PREDICTION CENTER NORMAN OK
150 PM EDT SAT JUN 2 2007

THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 

       NORTHERN CONNECTICUT
       MASSACHUSETTS
       SOUTHERN MAINE
       SOUTHERN NEW HAMPSHIRE
       EASTERN AND NORTHERN NEW YORK
       NORTHERN RHODE ISLAND
       SOUTHERN VERMONT
       COASTAL WATERS

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 150 PM UNTIL
800 PM EDT.

HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70
MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 30 MILES WEST
SOUTHWEST OF SARANAC LAKE NEW YORK TO 20 MILES SOUTH OF
PORTSMOUTH NEW HAMPSHIRE.  FOR A COMPLETE DEPICTION OF THE WATCH
SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).

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 330...

DISCUSSION...SCATTERED THUNDERSTORMS WILL DEVELOP AND INTENSIFY
THOUGH THE AFTERNOON ALONG AND S OF A STATIONARY FRONT ACROSS NRN
NEW ENGLAND.  MODERATE INSTABILITY /SBCAPE VALUES NEAR 1500 J/KG/
AND 0-6 KM BULK SHEAR OF 30-40 KT WILL SUPPORT A FEW STORMS WITH
SUPERCELL STRUCTURES...WHICH WILL LOCALLY ENHANCE THE THREAT FOR
LARGE HAIL AND DAMAGING WINDS.  IN ADDITION...CONVECTION FORMING IN
ONTARIO MAY EVENTUALLY SPREAD INTO UPSTATE NY LATER THIS
AFTERNOON/EVENING.  FARTHER S...VERTICAL SHEAR IS WEAKER ACROSS
INTERIOR SE NY AND SRN NEW ENGLAND...BUT A FEW OF THE STRONGER
STORMS MAY PRODUCE ISOLATED DAMAGING DOWNBURSTS AND SOME HAIL.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM
MOTION VECTOR 30030.


...THOMPSON

Severe Thunderstorm Watches in New York, 2007Severe Thunderstorm Watches in Massachusetts, 2007Severe Thunderstorm Watches in New Hampshire, 2007Every severe thunderstorm watch in 2007

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.