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Active severe wx day possible on Wednesday across parts of PA/NY


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MESOSCALE DISCUSSION 0600 NWS STORM PREDICTION CENTER NORMAN OK 0551 PM CDT TUE APR 26 2011 AREAS AFFECTED...CNTRL PA...CNTRL/NERN NY...WRN VT CONCERNING...SEVERE THUNDERSTORM WATCH 213... VALID 262251Z - 262345Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 213 CONTINUES. SEVERAL STRONG-SVR THUNDERSTORMS ARE ONGOING ACROSS CNTRL PA AND CNTRL NY...WITH MANY DISPLAYING THE POTENTIAL FOR PRODUCING DMGG WINDS AND/OR LARGE HAIL. THE ENVIRONMENT REMAINS FAVORABLE FOR MAINTAINING CONVECTION ACROSS THE AREA...WITH MLCAPE VALUES RANGING BETWEEN 500-1000 J/KG N TO 1000-1500 J/KG S PER RUC OBJECTIVE ANALYSIS FIELDS. A WARM FRONT SUBJECTIVELY ANALYZED FROM 30 N SYR TO 40 E UCA TO 30 SE GFL REMAINS NEARLY STATIONARY...WITH NELY STORM MOTION RESULTING IN STORMS CROSSING THE FRONT AND QUICKLY BECOMING ELEVATED/WEAKENING. ONE STORM THAT HAS MAINTAINED INTENSITY HAS MOVED INTO WARREN COUNTY...THOUGH IT IS UNCERTAIN WHETHER IT IS SURFACE BASED GIVEN A COOLER/STABLE BOUNDARY LAYER. HOWEVER...THIS MAY POSE A LOCALIZED THREAT FOR PRODUCING LARGE HAIL AND DMGG WINDS AS IT MOVES ENE. THE RISK FOR STRONG-SVR CONVECTION IS EXPECTED TO CONTINUE THROUGH THE DURATION OF THE WATCH /EVEN WITH THE LOSS OF SFC HEATING/...AS LLJ/WAA STRENGTHENS THIS EVENING AND MAINTAINS SBCAPE. HI-RESOLUTION SHORT-TERM MODEL GUIDANCE /INCLUDING THE WRF-NMM AND EXPERIMENTAL HRRR MODELS/ INDICATE ANOTHER ROUND OF CONVECTION MAY INITIATE OVER SWRN PA AND CONGEAL INTO A LINE. TRENDS WILL CONTINUE TO BE MONITORED IN CASE A LOCAL EXTENSION IN TIME OR A NEW WW WILL BE REQUIRED LATER THIS EVENING.

..ROGERS.. 04/26/2011

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Latest SPC SREF continues to indicate some very nice potential these next two days, with tomorrow mainly a chunk of NY/PA then Thursday E NY/PA and perhaps western SNE...the only issue is the degree of instability. What's going to suck the next few days is ML lapse rates may not be as great as today so that alone will decrease the level at which the atmosphere can destabilize. Anyways, if we can get sufficient heating over the next two days there could be some decent localized severe.

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Latest SPC SREF continues to indicate some very nice potential these next two days, with tomorrow mainly a chunk of NY/PA then Thursday E NY/PA and perhaps western SNE...the only issue is the degree of instability. What's going to suck the next few days is ML lapse rates may not be as great as today so that alone will decrease the level at which the atmosphere can destabilize. Anyways, if we can get sufficient heating over the next two days there could be some decent localized severe.

You guys should have a solid two days of potential....out here in CNY, tomorrow may be last go around.....but honestly, with about 8+" of rain the last 3 weeks, we could skip a few potential events.....unless someone has a combine harvester for my lawn in a couple weeks when it'll be dry enough to cut!!

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You guys should have a solid two days of potential....out here in CNY, tomorrow may be last go around.....but honestly, with about 8+" of rain the last 3 weeks, we could skip a few potential events.....unless someone has a combine harvester for my lawn in a couple weeks when it'll be dry enough to cut!!

What really complicates the forecast, especially out my way is the southerly winds at the sfc...I have Long Island Sound to my south and southerly sfc winds and southerly low-level winds means a flow right off the Sound, which this time of year is still pretty cool. This could really keep things rather stable throughout much of CT (except Litchfield and NW Fairfield counties). Climo would suggest that's what will happen.

However, looking at forecast soundings for HFD/BDL the atmosphere is only completely saturated in the lowest 900mb or so...above this the atmosphere is actually fairly dry...this leads me to believe we have a chance to actually see a bit more sun than what models are showing. If this holds true though the next question is what are we looking at for timing of the front?

I could def see E NY/PA as solid threat areas with perhaps extreme western MA/CT but threat decreasing rapidly east of that as the airmass is much more stable...elevated storms would be possible though!

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TORNADO WARNINGNYC077-270245-/O.NEW.KBGM.TO.W.0004.110427T0159Z-110427T0245Z/BULLETIN - EAS ACTIVATION REQUESTEDTORNADO WARNINGNATIONAL WEATHER SERVICE BINGHAMTON NY959 PM EDT TUE APR 26 2011THE NATIONAL WEATHER SERVICE IN BINGHAMTON HAS ISSUED A* TORNADO WARNING FOR... EASTERN OTSEGO COUNTY IN CENTRAL NEW YORK...* UNTIL 1045 PM EDT.* AT 957 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR LAURENS... MOVING NORTHEAST AT 45 MPH.* THE STORM CAPABLE OF PRODUCING THE TORNADO WILL BE NEAR... HARTWICK AND MILFORD BY 1005 PM EDT... HYDE PARK AND INDEX BY 1010 PM EDT... BOWERSTOWN...COOPERSTOWN AND 6 MILES NORTHWEST OF ELK CREEK BY 1015 PM EDT... MIDDLEFIELD BY 1020 PM EDT... CHERRY VALLEY BY 1030 PM EDT...WHEN YOU CAN DO SO SAFELY...PLEASE REPORT HAIL...OR DAMAGING WINDS TOTHE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE AT1-877-633-6772...OR BY EMAIL AT [email protected]/PREPAREDNESS ACTIONS...IF YOU ARE IN THE PATH OF THIS TORNADO...SEEK SHELTER IN A BASEMENTOR AN INTERIOR ROOM...AWAY FROM WINDOWS.&&LAT...LON 4250 7506 4262 7519 4288 7477 4284 7466 4282 7465 4279 7466 4273 7466 4267 7464TIME...MOT...LOC 0200Z 236DEG 38KT 4259 7507$$DJP

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Surprised this thread doesn't have more action. The latest AFD out of CTP is quite concerning....

.NEAR TERM /THROUGH 6 PM TODAY/...

-- Changed Discussion --BKN-OVC STRATO CU CONTINUING TO THIN OUT ACROSS THE CENTRAL RIDGE

AND VALLEY THROUGH THE MID AFTERNOON HOURS. CLOUDS WILL BE LAST TO

BREAK ACROSS THE LOWER SUSQ VALLEY WHERE AN UPSTREAM FEED OF LLVL

MOISTURE FROM THE MD/VA PIEDMONT WILL CONTINUE THROUGH AT LEAST

20Z.

MU CAPES ALREADY EXCEEDING 1000 J/KG ACROSS THE WRN HIGH

TERRAIN...AND THIS INSTABILITY WILL GRADUALLY SPREAD EAST INTO THE

CENTRAL ZONES LATER THIS AFTERNOON AS THE CLOUDS BREAK.

STRONG SOUTHERLY/SW WINDS ALOFT...RESULTING IN A BROAD LOOP

HODOGRAPH /COMBINED WITH THE INCREASING CAPE/...IS READILY SEEN

IN RARELY SEEN 0-1KM EHI VALUES OF 3-4M2/S2 LATER THIS AFTERNOON

BETWEEN 19-22Z.

IF TSRA CELLS CAN FIRE AHEAD OF THE ADVANCING...CURRENTLY

WEAKENING SQUALL LINE FROM CENTRAL OHIO...SUPER-CELLULAR STRUCTURE

WILL BE QUITE EASILY ATTAINED.

...FROM EARLY MORNING DISCUSSION...

2 TO 3 STANDARD-DEVIATION ABOVE-NORMAL PRECIPITABLE WATER VALUES

WILL RESIDE OVER THE REGION THROUGH FROPA WED NIGHT/THURSDAY

MORNING. A DECENT SHORT WAVE TROUGH WILL MOVE INTO WRN PA THIS

AFTN...AND WILL PROBABLY KICK OFF OR MAKE MORE-WIDESPREAD ANY ON-

GOING CONVECTION. A LOOK AT THE HODOGRAPHS FROM THE NAM AND GFS

FOR THIS AFTN/EVENING ARE EYE-POPPING. AT UNV...A FANTASTIC CURVE

WITH 50KTS STORM MOTION TO THE NE. HELICITY IN THE 200-400 RANGE

AND CAPE AROUND 1000. THESE VALUES ARE ENOUGH TO PROMPT A SLIGHT

RISK FROM SPC AND COULD BE SIGNIFICANT ENOUGH FOR A MOD RISK...BUT

NOT YET...AS FOCUS MECHS TOUGH TO FIND. HIGHER CAPES WITH THE

HIGHER MSTR TO THE SOUTH...BUT MTS AND THE APPCH OF THE TROUGH

WILL KEEP BEST CHCS FOR THE TSTMS IN THE CENTRAL AND WRN MTS THIS

AFTN. THE STORM MOTIONS WOULD RIDE THEM UP INTO THE NRN AND NERN

MTS AGAIN. THUS...HEAVY RAIN IS ALSO A CONCERN - ESP IN THE PLACES

WHERE THE HEAVY RAIN HAS ALREADY FALLEN THESE PAST FEW DAYS.

TEMPS VERY MUCH ABOVE NORMALS...BUT CLOUDS AND PRECIP SHOULD

AGAIN PRECLUDE ANY RECORDS FROM BEING SET.-- End Changed Discussion --

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BULLETIN - EAS ACTIVATION REQUESTED

TORNADO WARNING

NATIONAL WEATHER SERVICE BUFFALO NY

543 PM EDT WED APR 27 2011

THE NATIONAL WEATHER SERVICE IN BUFFALO HAS ISSUED A

* TORNADO WARNING FOR...

SOUTHWESTERN ALLEGANY COUNTY IN WESTERN NEW YORK...

SOUTHEASTERN CATTARAUGUS COUNTY IN WESTERN NEW YORK...

THIS INCLUDES THE CITY OF OLEAN...

* UNTIL 615 PM EDT

* AT 537 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A

SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 10 MILES SOUTH

OF ST. BONAVENTURE...OR 6 MILES EAST OF BRADFORD...MOVING NORTHEAST

AT 45 MPH.

* THE TORNADO WILL BE NEAR...

WESTON MILLS...

HINSDALE...

CUBA...

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Wow... what a night! And it's still on-going this morning across C & E NY with lots of Flash Flooding and Severe Weather...

Potentially significant tornado damage occurred early this morning near Elmira and Ithaca in Chemung-Tompkins counties...

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE BINGHAMTON NY
530 AM EDT THU APR 28 2011


0130 AM     TORNADO          SWARTWOOD               42.23N  76.62W
04/28/2011                   CHEMUNG            NY   LAW ENFORCEMENT

           EMERGENCY MANAGEMENT REPORTS POSSIBLE TORNADO. 6 HOMES
           DAMAGED AND NOT HABITABLE...NUMEROUS TREES DOWN.


0140 AM     TORNADO          1 NE DANBY              42.36N  76.47W
04/28/2011                   TOMPKINS           NY   EMERGENCY MNGR

           POSSIBLE TORNADO...4 TO 5 HOMES WITH MAJOR STRUCTURAL
           DAMAGE

0150 AM     TSTM WND DMG     SPENCER                 42.22N  76.49W
04/28/2011                   TIOGA              NY   PUBLIC

           NUMEROUS TREES DOWN

0216 AM     TSTM WND DMG     GROTON                  42.59N  76.37W
04/28/2011                   TOMPKINS           NY   FIRE DEPT/RESCUE

           POSSIBLE TORNADO. SEVERAL TREES. ANSD POLES DOWN...ROOF
           OFF HOUSE.

And now another report of potentially significant tornado damage this morning. This one just coming in from Frankfort in Herkimer County...

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ALBANY NY
609 AM EDT THU APR 28 2011

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

0500 AM     TORNADO          FRANKFORT               43.04N 75.07W
04/28/2011                   HERKIMER           NY   EMERGENCY MNGR

           POSSIBLE TORNADO. SIGNIFICANT DAMAGE TO HOUSE ON BROCKWAY
           ROAD.

0500 AM     TORNADO          FRANKFORT CENTER        43.05N 75.14W
04/28/2011                   HERKIMER           NY   TRAINED SPOTTER

           POSSIBLE TORNADO. MULTIPLE TREES UPROOTED AND A SIDE OF
           HOUSE PLASTERED IN MUD.

0515 AM     TSTM WND DMG     FRANKFORT               43.04N 75.07W
04/28/2011                   HERKIMER           NY   TRAINED SPOTTER

           MULTIPLE TREES DOWN

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The vast bulk of it was west of here I guess. Just before I went to sleep that line from central NY was falling to pieces as it reached us. Now this morning I see some stuff moving in here, but I doubt it can be severe at this time of the day. Timing probably not optimal....

That said ...we are a swamp here after the numerous rains in April and the last two days of warm wx was so ovc and damp that it was useless in terms of drying things out. My lawn has come on strong and probably could be cut in a few days, but I wouldn't dare take the lawn tractor on it now ---probably sink in six inches in low spots. The horses are residing in a foot deep muddy swamp out back.

Wow... what a night! And it's still on-going this morning across C & E NY with lots of Flash Flooding and Severe Weather...

Potentially significant tornado damage occurred early this morning near Elmira and Ithaca in Chemung-Tompkins counties...

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE BINGHAMTON NY
530 AM EDT THU APR 28 2011


0130 AM 	TORNADO          SWARTWOOD           	42.23N  76.62W
04/28/2011               	CHEMUNG            NY   LAW ENFORCEMENT

           EMERGENCY MANAGEMENT REPORTS POSSIBLE TORNADO. 6 HOMES
           DAMAGED AND NOT HABITABLE...NUMEROUS TREES DOWN.


0140 AM 	TORNADO          1 NE DANBY              42.36N  76.47W
04/28/2011               	TOMPKINS       	NY   EMERGENCY MNGR

           POSSIBLE TORNADO...4 TO 5 HOMES WITH MAJOR STRUCTURAL
           DAMAGE

0150 AM 	TSTM WND DMG 	SPENCER             	42.22N  76.49W
04/28/2011               	TIOGA              NY   PUBLIC

           NUMEROUS TREES DOWN

0216 AM 	TSTM WND DMG 	GROTON                  42.59N  76.37W
04/28/2011               	TOMPKINS       	NY   FIRE DEPT/RESCUE

           POSSIBLE TORNADO. SEVERAL TREES. ANSD POLES DOWN...ROOF
           OFF HOUSE.

And now another report of potentially significant tornado damage this morning. This one just coming in from Frankfort in Herkimer County...

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ALBANY NY
609 AM EDT THU APR 28 2011

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

0500 AM 	TORNADO          FRANKFORT           	43.04N 75.07W
04/28/2011               	HERKIMER       	NY   EMERGENCY MNGR

           POSSIBLE TORNADO. SIGNIFICANT DAMAGE TO HOUSE ON BROCKWAY
           ROAD.

0500 AM 	TORNADO          FRANKFORT CENTER        43.05N 75.14W
04/28/2011               	HERKIMER       	NY   TRAINED SPOTTER

           POSSIBLE TORNADO. MULTIPLE TREES UPROOTED AND A SIDE OF
           HOUSE PLASTERED IN MUD.

0515 AM 	TSTM WND DMG 	FRANKFORT           	43.04N 75.07W
04/28/2011               	HERKIMER       	NY   TRAINED SPOTTER

           MULTIPLE TREES DOWN

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