Severe Thunderstorm Watch 521

Issued

Sep 11, 2013, 2:33 PM EDT (18:33 UTC)

Expired

Sep 12, 2013, 12:00 AM EDT

In force

9 hr

Issued by

the Storm Prediction Center

Largest hail expected

2 in

Strongest gust expected

60 kt

The Burlington radar (KCXX), 80 km from the middle of the area, began a volume at 18:32 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

10%

One or more EF2 to EF5 tornadoes

2%

Ten or more severe wind reports

60%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

20%

One or more hailstones of 2 inches or more

30%

Six or more combined severe hail and wind reports

90%

• Mesoscale Discussion 1872Sep 11, 1:30 PM EDT
• Mesoscale Discussion 1875Sep 11, 6:54 PM EDT
• Mesoscale Discussion 1876Sep 11, 9:44 PM EDT

525 
WWUS20 KWNS 111833
SEL1  
SPC WW 111833
MAZ000-MEZ000-NHZ000-NYZ000-VTZ000-120200-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 521
NWS STORM PREDICTION CENTER NORMAN OK
235 PM EDT WED SEP 11 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
  WESTERN MASSACHUSETTS
  NORTHERN AND CENTRAL MAINE
  NEW HAMPSHIRE
  EASTERN NEW YORK
  VERMONT

* EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 235 PM
  UNTIL 1000 PM EDT.

* PRIMARY THREATS INCLUDE...
  SEVERAL DAMAGING WIND GUSTS TO 70 MPH LIKELY
  A FEW VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE

THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 70 MILES WEST
NORTHWEST OF ALBANY NEW YORK TO 5 MILES SOUTH SOUTHEAST OF
HOULTON MAINE.  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 520...

DISCUSSION...THUNDERSTORMS ARE EXPECTED TO INCREASE IN COVERAGE AND
INTENSITY ACROSS THE WATCH AREA THIS AFTERNOON INTO EVENING.  WHILE
A BRIEF TORNADO IS POSSIBLE OVER NORTHERN OR CENTRAL
MAINE...DAMAGING WINDS AND SOME HAIL WILL BE THE PRIMARY SEVERE
WEATHER HAZARDS.

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 27030.


...MEAD

Severe Thunderstorm Watches in New York, 2013Severe Thunderstorm Watches in Maine, 2013Severe Thunderstorm Watches in Vermont, 2013Every severe thunderstorm watch in 2013

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.