Severe Thunderstorm Warning 89, NWS Burlington, VT

134 
WWUS51 KBTV 081940
SVSBTV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
340 PM EDT SAT SEP 8 2012

NYC019-033-082000-
/O.CON.KBTV.SV.W.0089.000000T0000Z-120908T2000Z/
CLINTON NY-FRANKLIN NY-
340 PM EDT SAT SEP 8 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR NORTHEASTERN FRANKLIN AND NORTHWESTERN CLINTON COUNTIES IN
NORTHERN NEW YORK...

AT 335 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH. THE STORM WAS NEAR OWLS HEAD...MOVING NORTHEAST AT 55 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO...
  CHURUBUSCO...CHATEAUGAY...

WHEN YOU CAN DO SO SAFELY...PLEASE REPORT DAMAGING WINDS OR HAIL TO
THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1 800 8 6 3 4 2 7
9...OR BY SUBMITTING A STORM REPORT AT WEATHER.GOV/BURLINGTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

&&

LAT...LON 4469 7404 4478 7426 4500 7409 4501 7376
TIME...MOT...LOC 1940Z 210DEG 50KT 4481 7409

$$
LOCONTO

303 
WWUS51 KBTV 081959
SVSBTV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
359 PM EDT SAT SEP 8 2012

NYC019-033-082010-
/O.EXP.KBTV.SV.W.0089.000000T0000Z-120908T2000Z/
CLINTON NY-FRANKLIN NY-
359 PM EDT SAT SEP 8 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN FRANKLIN AND
NORTHWESTERN CLINTON COUNTIES IN NORTHERN NEW YORK HAS EXPIRED...

THE STORM HAS WEAKENED...THEREFORE THE NATIONAL WEATHER SERVICE HAS
ALLOWED THE SEVERE THUNDERSTORM WARNING TO EXPIRE.

HOWEVER...THUNDERSTORMS WITH SMALL HAIL...BRIEF GUSTY WINDS...HEAVY
DOWNPOURS...AND DEADLY LIGHTNING REMAIN POSSIBLE.

IF YOU HEAR THUNDER...LIGHTNING IS CLOSE ENOUGH TO STRIKE YOU. STAY
IN SAFE SHELTER AT LEAST 30 MINUTES AFTER YOU HEAR THE LAST CLAP OF
THUNDER.

WHEN YOU CAN DO SO SAFELY...PLEASE REPORT DAMAGING WINDS OR HAIL TO
THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1 800 8 6 3 4 2 7
9...OR BY SUBMITTING A STORM REPORT AT WEATHER.GOV/BURLINGTON.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT SATURDAY EVENING
FOR NORTHERN NEW YORK AND VERMONT.

LAT...LON 4469 7404 4478 7426 4500 7409 4501 7376
TIME...MOT...LOC 2000Z 210DEG 50KT 4505 7389

$$
LOCONTO

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BURLINGTON VT
203 PM EDT SAT SEP 8 2012

.SYNOPSIS...
A STRONG COLD FRONT AND ASSOCIATED SURFACE LOW PRESSURE SYSTEM OVER
SOUTHEASTERN ONTARIO AND THE OHIO VALLEY EARLY THIS MORNING WILL
BRING WINDY AND WARM CONDITIONS TO THE NORTH COUNTRY TODAY. SOUTH
WINDS OF 15 TO 25 MPH ARE EXPECTED...WITH GUSTS TO 40 MPH ESPECIALLY
THIS AFTERNOON. DESPITE CONSIDERABLE MID AND HIGH CLOUD
COVER...TEMPERATURES WILL REMAIN ON THE WARM SIDE EAST OF THE
FRONTAL SYSTEM WITH HIGHS IN THE LOWER 80S. THE SURFACE LOW TRACKS
NORTHEASTWARD NORTH OF THE ST. LAWRENCE VALLEY THIS AFTERNOON AND
THIS EVENING...WITH A STRONG SOUTHWARD TRAILING COLD FRONT
SWEEPING EASTWARD ACROSS THE NORTH COUNTRY. THIS FRONT WILL BE
ACCOMPANIED BY A LINE OF SHOWERS AND POTENTIALLY SEVERE
THUNDERSTORMS...MOVING ACROSS NORTHERN NEW YORK LATE THIS
AFTERNOON AND THEN INTO VERMONT EARLY THIS EVENING. LOCALLY
DAMAGING WINDS WILL ACCOMPANY THE THUNDERSTORMS ALONG WITH BRIEF
HEAVY DOWNPOURS. DRIER AND COOLER WEATHER WILL RETURN TO THE NORTH
COUNTRY BEHIND THE FRONT FOR SUNDAY...WITH AN EXTENDED PERIOD OF
DRY AND PLEASANT WEATHER EXPECTED FOR MUCH OF NEXT WEEK.

&&

.NEAR TERM /UNTIL 11 PM THIS EVENING/...
AS OF 1247 PM EDT SATURDAY...TORNADO WATCH 637 JUST ISSUED FOR
ALL OF NORTHERN NEW YORK AND VERMONT. WIND ADVISORY ALSO REMAINS
IN EFFECT ACROSS ENTIRE REGION AS WELL WITH NON-THUNDERSTORM WIND
GUSTS UP TO 50 MPH POSSIBLE. RECENTLY HAD A GUST TO 42 KNOTS AT
SARANAC LAKE AND 33 KNOTS AT MASSENA...AS WELL AS A FEW REPORTS OF
SOME ISOLATED MINOR TREE DAMAGE AND POWER OUTAGES.

MAIN SQUALL LINE NOW PUSHING EASTWARD ACROSS EASTERN LAKE ONTARIO
AND EXTENDING SOUTHWARD TO SYRACUSE AND INTO PENNSYLVANIA. CAPE
CONTINUES TO BE AROUND 1000 J/KG AND THIS COMBINED WITH LARGELY
UNI- DIRECTIONAL 0-6KM WIND SHEAR OF 50 KNOTS WILL CONTINUE TO
SUPPORT DAMAGING WINDS AS THE GREATEST THREAT. HAVE OBSERVED A FEW
WEAK ROTATING COUPLETS ALONG LINE...THUS POTENTIAL FOR A FEW WEAK
TORNADO SPIN-UPS ARE POSSIBLE. EXPECT LINE TO INTENSIFY AS IT
MOVES EASTWARD AND INTO THE REGION. TIMING LOOKS TO BE NOW THROUGH
20Z ACROSS THE ADIRONDACKS AND SAINT LAWRENCE VALLEY...AND 20Z
THROUGH 01Z FROM THE CHAMPLAIN VALLEY EASTWARD.

ADDITIONAL SEPARATE THUNDERSTORMS HAVE DEVELOPED SOUTH OF THE AREA
IN SOUTHERN NEW YORK AND MASSACHUSETTS. THESE STORMS HAVE A HISTORY OF
BEING SEVERE AS WELL AND WILL CONTINUE TO PUSH NORTHWARD INTO
RUTLAND AND WINDSOR COUNTIES.

&&

.SHORT TERM /11 PM THIS EVENING THROUGH MONDAY/...
AS OF 325 AM EDT SATURDAY...COLD FRONT AND CONVECTIVE LINE EXITS
QUICKLY INTO NH AFTER 02Z AND JUST A CHANCE OF A FEW LINGERING
SHOWERS. WEST WINDS AND LOW-LEVEL CAA OVERNIGHT...SHOULD SEE
OVERNIGHT LOWS IN THE LOW-MID 50S ACROSS VT...BUT IN THE UPR 40S
ACROSS NRN NY WITH LONGER PERIOD OF CAA.

COLD FRONT IS EXPECTED TO HAVE PROGRESSED
INTO THE GULF OF MAINE BY 12Z SUNDAY WITH A SIGNIFICANTLY COOLER
AND DRIER AIR MASS IN PLACE ACROSS THE REGION. 850MB TEMPS
EXPECTED TO DECREASE TO AROUND +6C BY 18Z SUNDAY...SUPPORTING
HIGHS ONLY IN THE UPR 60S TO LWR 70S. W-NW WINDS WILL BE IN
PLACE...BUT NOT PARTICULARLY STRONG AS P-GRADIENT IS EXPECTED TO
SLACKEN THROUGH THE DAY. WINDS GENERALLY NW 5-10 MPH. BOUNDARY
LAYER DEWPOINTS ARE EXPECTED TO FALL INTO THE MID-UPR 40S BY
AFTN...SO IT WILL FEEL A BIT CRISP. RESIDUAL MOISTURE BELOW
DEVELOPING SUBSIDENCE INVERSION LAYER 5-6KFT SHOULD RESULT IN SOME
PASSING CLOUDS THRU THE DAY. ALSO...THERE IS A SECOND UPR TROUGH
THAT MOVES THRU DURING THE AFTN...WHICH WILL INCREASE MID-UPR CLOUDS
AND BRING A SLIGHT CHANCE OF A LIGHT RAIN SHOWER OR
TWO...ESPECIALLY ACROSS NRN NY. KEPT JUST A 20 POP AND WITH PARTLY
SUNNY SKIES GENERALLY EXPECTED.

THE NORTH COUNTRY WILL REMAIN ON ERN PERIPHERY OF LARGE REGION OF
HIGH PRESSURE BUILDING EWD ACROSS THE GREAT LAKES SUNDAY NIGHT AND
MONDAY. THIS WILL RESULT IN MOSTLY CLEAR SKIES AND PLEASANTLY DRY
AND SEASONABLE CONDITIONS...AND LIGHT NORTH WINDS FOR THE DAYLIGHT
HRS MONDAY. SLIGHT CHANCE OF A LINGERING SHOWER EARLY SUNDAY
EVENING/NIGHT AS AFOREMENTIONED UPR TROUGH DEPARTS...BUT THEN
CLEARING WITH NO PRECIP FCST 06Z MON THRU 00Z TUE.  LOW TEMPERATURES
GENERALLY IN THE MID 40S FOR SUNDAY NIGHT...WITH A FEW READINGS IN
THE 30S FOR THE NORMALLY COOLER LOCATIONS IN THE NRN ADIRONDACKS AND
FAR NERN VT. MAY SEE SOME PATCHY FOG IN THE NORMALLY PRONE RIVER
VALLEYS. HIGH TEMPERATURES ON MONDAY WILL GENERALLY BE IN THE
MID-UPR 60S DESPITE NEARLY FULL SUNSHINE. DAYTIME WINDS MONDAY
GENERALLY NW AROUND 10 MPH...WITH A FEW GUSTS TO 20 MPH DURING THE
AFTN.

&&

.LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
AS OF 347 AM EDT SATURDAY...QUIET WEATHER PATTERN FOR THE
EXTENDED PERIOD...INTERRUPTED ONLY BY A WEAK FRONT SAGGING SOUTH
OUT OF CANADA LATE IN THE PERIOD.

HIGH PRESSURE FIRMLY ENTRENCHED AT SURFACE AND ALOFT THROUGH FIRST
FEW DAYS OF THE EXTENDED PERIOD. VERY GOOD RADIATIONAL CONDITIONS
WITH LOW RH THROUGH THE COLUMN FOR CLEAR SKIES...AND RIDGE OF HIGH
PRESSURE PRODUCING LIGHT WINDS. FROM MID WEEK ONWARD...RIDGE
SLOWLY MOVES EAST AND WILL SEE A SLOW WARMING TREND. TOWARD THE
END OF THE WEEK A COLD FRONT MOVES IN FROM THE NORTHWEST...HOWEVER
VERY LITTLE MOISTURE TO WORK WITH. POPS COME UP TO CHANCE CATEGORY
ALONG THE CANADIAN BORDER...TAPERING OFF TO THE SOUTH.

&&

.AVIATION /18Z SATURDAY THROUGH THURSDAY/...
THROUGH 18Z SUNDAY...

...GUSTY SOUTH WINDS AND TURBULENCE EXPECTED 18Z SAT THROUGH 00Z
SUNDAY...
...SQUALL LINE/SVR WINDS POSSIBLE 18Z THROUGH 02Z SAT/SUN...

VRB CONDS THROUGH 02Z AS STRONG SOUTH/SOUTHWEST WINDS AFFECT THE
REGION AND STRONG COLD FRONT WITH ASSOC PRE-FRONTAL SQUALL LINE PUSHES
THROUGH. SOUTH/SOUTHWEST WINDS SUSTAINED 15-25 KT WITH GUSTS 35 TO
45 KT POSSIBLE AHEAD OF THE CONVECTIVE LINE. MODERATE TO STRONG
LOW LEVEL TURBULENCE LIKELY. SEVERE WINDS LOCALLY TO 50+ KTS
WESTERLY ALONG THE CONVECTIVE LINE FROM 18Z-02Z. BEHIND FRONTAL
PASSG A PERIOD OF MVFR CIGS POSSBL AS WINDS BACK TO
SOUTHWESTERLY...THEN WESTERLY OVERNIGHT AND ABATE. NO PCPN
EXPECTED AFTER 06Z. AFTER 12Z WINDS LIGHT WEST TO WEST-
NORTHWESTERLY AS SKIES TREND SCT VFR WITH CIGS GENERALLY IN THE
FL040-060 RANGE.

OUTLOOK 18Z SUNDAY THROUGH WEDNESDAY...

18Z SUNDAY THROUGH 00Z MONDAY...MVFR TO VFR CIGS IN LINGERING LOW
LEVEL MOISTURE.

00Z MONDAY THROUGH WEDNESDAY...VFR CLEAR EXCEPT
NOCTURNAL IFR TO LIFR MAINLY IN USUAL FOG PRONE LOCATIONS
KSLK/KMPV BUT OTHER SITES IFR POSSIBLE.

&&

.MARINE...
SIGNIFICANT WINDS AND WAVES EXPECTED ON LAKE CHAMPLAIN ON SATURDAY
AND SATURDAY EVENING. SOUTH WINDS HAVE ALREADY EXCEEDED LAKE WIND
ADVISORY CRITERIA THIS MORNING /IN THE 25 TO 35 KNOT RANGE/.
SUSTAINED SOUTH WINDS OF 25 TO 40 KNOTS ARE EXPECTED THROUGH THE
AFTERNOON AND EVENING WITH POSSIBLE HIGHER GUSTS. WINDS WILL
BECOME SOUTHWEST AND TAPER OFF TO 10 TO 20 KNOTS AFTER MIDNIGHT
SATURDAY NIGHT.

WAVES OF 4 TO 6 FEET ARE EXPECTED THIS AFTERNOON AND
EVENING...THOUGH WAVES WILL GRADUALLY LESSEN AFTER MIDNIGHT
SATURDAY NIGHT TO 1 TO 3 FEET.

A PERIOD OF HEAVY RAIN AND STRONG TO POSSIBLY SEVERE THUNDERSTORMS
IS ALSO EXPECTED SATURDAY EVENING WITH POTENTIALLY STRONGER WINDS
AND HIGHER WAVES.

&&

.BTV WATCHES/WARNINGS/ADVISORIES...
VT...WIND ADVISORY UNTIL 8 PM EDT THIS EVENING FOR VTZ001>012-
     016>019.
NY...WIND ADVISORY UNTIL 8 PM EDT THIS EVENING FOR NYZ026>031-034-
     035-087.

&&

SYNOPSIS...BANACOS
NEAR TERM...MUCCILLI
SHORT TERM...BANACOS
LONG TERM...HANSON
AVIATION...JMG/HANSON
MARINE...BTV

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BURLINGTON VT
340 AM EDT SAT SEP 8 2012

NYZ026>031-034-035-087-VTZ001>012-016>019-090745-
NORTHERN ST. LAWRENCE-NORTHERN FRANKLIN-EASTERN CLINTON-
SOUTHEASTERN ST. LAWRENCE-SOUTHERN FRANKLIN-WESTERN CLINTON-
WESTERN ESSEX-EASTERN ESSEX-SOUTHWESTERN ST. LAWRENCE-GRAND ISLE-
WESTERN FRANKLIN-ORLEANS-ESSEX-WESTERN CHITTENDEN-LAMOILLE-CALEDONIA-
WASHINGTON-WESTERN ADDISON-ORANGE-WESTERN RUTLAND-WINDSOR-
EASTERN FRANKLIN-EASTERN CHITTENDEN-EASTERN ADDISON-EASTERN RUTLAND-
340 AM EDT SAT SEP 8 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW YORK...CENTRAL
VERMONT...NORTHEAST VERMONT...NORTHWEST VERMONT AND SOUTHERN
VERMONT.

.DAY ONE...TODAY AND TONIGHT.

A COLD FRONT APPROACHING FROM THE WEST WILL BE PRECEDED BY STRONG
SOUTH TO SOUTHWESTERLY WINDS ACROSS THE NORTH COUNTRY SATURDAY
AFTERNOON INTO SATURDAY EVENING. SUSTAINED WINDS OF 20 TO 30 MPH
ARE EXPECTED...WITH GUSTS UP TO 45 MPH POSSIBLE...ESPECIALLY IN
THE CHAMPLAIN VALLEY. ADDITIONALLY...THERE IS INCREASING
CONFIDENCE THAT A LINE OF STRONG TO SEVERE THUNDERSTORMS WILL
ACCOMPANY THE FRONT AS IT SWEEPS ACROSS THE REGION LATER SATURDAY
AFTERNOON INTO SATURDAY EVENING. THE PRIMARY THREAT FROM THESE
STORMS WILL BE STRONG TO DAMAGING WIND GUSTS AND BRIEF HEAVY
RAINFALL IN THE GENERAL TIME FRAME OF 4 PM TO 9 PM SATURDAY.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED THIS AFTERNOON.

BANACOS

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
1017 AM EDT SAT SEP 8 2012

NYZ028-031-034-035-VTZ001>012-016>019-081630-
EASTERN CLINTON-WESTERN CLINTON-WESTERN ESSEX-EASTERN ESSEX-
GRAND ISLE-WESTERN FRANKLIN-ORLEANS-ESSEX-WESTERN CHITTENDEN-
LAMOILLE-CALEDONIA-WASHINGTON-WESTERN ADDISON-ORANGE-
WESTERN RUTLAND-WINDSOR-EASTERN FRANKLIN-EASTERN CHITTENDEN-
EASTERN ADDISON-EASTERN RUTLAND-
INCLUDING THE CITIES OF...PLATTSBURGH...DANNEMORA...LAKE PLACID...
PORT HENRY...TICONDEROGA...ALBURGH...SOUTH HERO...ST. ALBANS...
NEWPORT...ISLAND POND...BURLINGTON...JOHNSON...STOWE...
ST. JOHNSBURY...MONTPELIER...MIDDLEBURY...VERGENNES...BRADFORD...
RANDOLPH...RUTLAND...SPRINGFIELD...WHITE RIVER JUNCTION...
ENOSBURG FALLS...RICHFORD...UNDERHILL...BRISTOL...RIPTON...
EAST WALLINGFORD...KILLINGTON
1017 AM EDT SAT SEP 8 2012

...SEVERE THUNDERSTORMS WITH DAMAGING WINDS EXPECTED THIS AFTERNOON
AND EVENING FOR THE NORTH COUNTRY...

STRONG TO LOCALLY SEVERE THUNDERSTORMS ARE EXPECTED THIS AFTERNOON
AND EVENING AS A POTENT COLD FRONT MOVES ACROSS THE NORTH COUNTRY.
ISOLATED TO SCATTERED THUNDERSTORM CELLS WILL BE POSSIBLE BY EARLY
TO MID-AFTERNOON...WITH AN EXPECTED DEVELOPMENT OF A LONG SQUALL
LINE MOVING EASTWARD BY LATE AFTERNOON AND INTO THE EVENING HOURS.
THE MAIN THREAT FROM SEVERE THUNDERSTORMS WILL BE FROM DAMAGING
STRAIGHT LINE WINDS. THE POTENTIAL FOR WIDESPREAD STRONG TO
DAMAGING WINDS IS POSSIBLE WITH THE DEVELOPING SQUALL LINE. THE
BEST TIMING FOR SEVERE THUNDERSTORMS WOULD BE BETWEEN 3 PM AND 8
PM. WHILE A SEVERE THUNDERSTORM WATCH IS CURRENTLY IN EFFECT FOR
SAINT LAWRENCE AND FRANKLIN COUNTIES IN NEW YORK...A SEVERE
WEATHER WATCH WILL LIKELY BECOME NECESSARY FOR THE REST OF THE
NORTH COUNTRY BY LATER TODAY BASED ON CURRENT INDICATIONS.

STATE AND LOCAL EMERGENCY MANAGERS ARE MONITORING THIS DEVELOPING
WEATHER SITUATION. PEOPLE ARE ENCOURAGED TO REVIEW SEVERE WEATHER
SAFETY RULES AND LISTEN TO TELEVISION AND RADIO OUTLETS AND NOAA
WEATHER RADIO FOR LATER STATEMENTS AND POSSIBLE WARNINGS.

LOCONTO/JMG

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BURLINGTON VT
233 PM EDT SAT SEP 08 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0119 PM     NON-TSTM WND DMG CANTON                  44.60N  75.17W
09/08/2012                   ST. LAWRENCE       NY   PUBLIC

            TREES AND POWERLINES DOWN

&&

EVENT NUMBER BTV1200385

MAB

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BURLINGTON VT
234 PM EDT SAT SEP 08 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0119 PM     NON-TSTM WND DMG LAKE PLACID             44.28N  73.98W
09/08/2012                   ESSEX              NY   EMERGENCY MNGR

            TREES AND POWERLINES DOWN

&&

EVENT NUMBER BTV1200386

MAB

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BURLINGTON VT
237 PM EDT SAT SEP 08 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0200 PM     TSTM WND GST     OGDENSBURG              44.69N  75.49W
09/08/2012  M59 MPH          ST. LAWRENCE       NY   TRAINED SPOTTER

            LARGE TREE DOWN ACROSS ROAD AND POWERLINES DOWN AS WELL

&&

EVENT NUMBER BTV1200387

MAB