Severe Thunderstorm Watch 504

Issued

Jul 23, 2012, 1:24 PM EDT (17:24 UTC)

Expired

Jul 23, 2012, 11:00 PM EDT

In force

10 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Ft Drum radar (KTYX), 88 km from the middle of the area, began a volume at 17:26 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

50%

One or more gusts of 65 knots or more

30%

Ten or more severe hail reports

70%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 1550Jul 23, 12:32 PM EDT
• Mesoscale Discussion 1554Jul 23, 4:01 PM EDT
• Mesoscale Discussion 1555Jul 23, 6:43 PM EDT
• Mesoscale Discussion 1557Jul 23, 8:39 PM EDT
• Mesoscale Discussion 1558Jul 23, 10:29 PM EDT

421 
WWUS20 KWNS 231724
SEL4
SPC WW 231724
CTZ000-MAZ000-NJZ000-NYZ000-PAZ000-VTZ000-CWZ000-240300-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 504
NWS STORM PREDICTION CENTER NORMAN OK
125 PM EDT MON JUL 23 2012

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

       WESTERN CONNECTICUT
       WESTERN MASSACHUSETTS
       NORTHERN NEW JERSEY
       CENTRAL AND EASTERN NEW YORK
       NORTHEAST PENNSYLVANIA
       VERMONT
       COASTAL WATERS

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 125 PM UNTIL
1100 PM EDT.

HAIL TO 2 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 95
STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTH
NORTHWEST OF BURLINGTON VERMONT TO 45 MILES SOUTH OF WILKESBARRE
PENNSYLVANIA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).

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.

DISCUSSION...SCATTERED THUNDERSTORMS ARE INCREASING ACROSS PARTS OF
CENTRAL NY AD NORTHERN NJ.  THIS REGION IS CHARACTERIZED BY A MOIST
AND MODERATELY UNSTABLE AIR MASS.  COOL TEMPERATURES ALOFT AND STEEP
LAPSE RATES WILL PROMOTE A RISK OF LOCALLY DAMAGING WINDS AND HAIL
THROUGH THE AFTERNOON IN THE STRONGEST STORMS.  AN MCS OVER ONTARIO
WILL ALSO TRACK INTO PARTS OF NY/VT LATER THIS AFTERNOON AND EVENING
WITH A CONTINUED RISK OF SEVERE WEATHER.

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 28030.


...HART

Severe Thunderstorm Watches in New York, 2012Severe Thunderstorm Watches in Pennsylvania, 2012Severe Thunderstorm Watches in New Jersey, 2012Every severe thunderstorm watch in 2012

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.